Brc

BRAKES

SECTION

BRC

BRAKE CONTROL SYSTEM

A

B

C

D

E

CONTENTS
VDC/TCS/ABS

Component Parts Location .....................................17
.
Component Description ..........................................17
.

BASIC INSPECTION ................................... 4
.
DIAGNOSIS AND REPAIR WORKFLOW ......... 4
.
Work Flow ................................................................ 4
.
Diagnostic Work Sheet ............................................. 7
.

INSPECTION AND ADJUSTMENT .................... 8
.
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT ......................................................... 8
.
CONTROL UNIT : Description ................................. 8
.
CONTROL UNIT : Special Repair Requirement ...... 8
ADJUSTMENT OF STEERING ANGLE SENSOR
NEUTRAL POSITION ................................................. 8
.
NEUTRAL POSITION : Description ......................... 8
.
NEUTRAL POSITION : Special Repair Requirement ......................................................................... 8
.

FUNCTION DIAGNOSIS ............................. 10
.
VDC ...................................................................10
.
System Diagram ..................................................... 10
.
System Description ................................................ 10
.
Component Parts Location ..................................... 11
.
Component Description .......................................... 11
.

TCS ....................................................................13
.
System Diagram ..................................................... 13
.
.
Component Parts Location ..................................... 14
.
Component Description .......................................... 14
.

ABS ...................................................................16
.
System Diagram ..................................................... 16
.
.

Revision: 2008 October

EBD ................................................................... 19
System Diagram .....................................................19
.
System Description .................................................19
.
Component Parts Location .....................................20
.
Component Description ..........................................20
.

DIAGNOSIS SYSTEM [ABS ACTUATOR
AND ELECTRIC UNIT (CONTROL UNIT)] ....... 22
CONSULT-III Function ...........................................22
.

COMPONENT DIAGNOSIS ........................ 27
.

BRC

G

H

I

J

C1101, C1102, C1103, C1104 WHEEL SENSOR ................................................................... 27
Description ..............................................................27
.
DTC Logic ...............................................................27
.
Diagnosis Procedure ..............................................27
.
Special Repair Requirement ...................................28
.

K

L

C1105, C1106, C1107, C1108 WHEEL SENSOR ................................................................... 30
Description ..............................................................30
.
DTC Logic ...............................................................30
.
.
.

M

N

C1109 POWER AND GROUND SYSTEM ........ 33
Description ..............................................................33
.
DTC Logic ...............................................................33
.
.
.

C1110, C1153, C1170 ABS ACTUATOR AND
ELECTRIC UNIT (CONTROL UNIT) ................. 35
DTC Logic ...............................................................35
.
.
.

BRC-1

2009 370Z

O

P

C1111 ABS MOTOR, MOTOR RELAY SYSTEM ................................................................... 36
.
Description ............................................................. 36
.
DTC Logic .............................................................. 36
.
Diagnosis Procedure ............................................. 36
.
Special Repair Requirement .................................. 37
.

C1114 ACTUATOR RELAY SYSTEM .............. 38
.
Description ............................................................. 38
.
DTC Logic .............................................................. 38
.
.
.

C1115 WHEEL SENSOR .................................. 40
.

C1145, C1146 YAW RATE/SIDE G SENSOR... 54
Description ............................................................. 54
.
DTC Logic .............................................................. 54
.
Diagnosis Procedure .............................................. 54
.
.

C1147, C1148, C1149, C1150 USV/HSV LINE 57
...
Description ............................................................. 57
.
DTC Logic .............................................................. 57
.
.
.

C1155 BRAKE FLUID LEVEL SWITCH .......... 59
.

Description ............................................................. 40
.
DTC Logic .............................................................. 40
.
.
.

Description ............................................................. 59
.
DTC Logic .............................................................. 59
.
.
Component Inspection ........................................... 60
.
.

C1116 STOP LAMP SWITCH ........................... 42
.

U1000, U1002 CAN COMM CIRCUIT .............. 61
.

Description ............................................................. 42
.
DTC Logic .............................................................. 42
.
.
.
.

Description ............................................................. 61
.
DTC Logic .............................................................. 61
.
.
.

C1120, C1122, C1124, C1126 IN ABS SOL .... 44
.
Description ............................................................. 44
.
DTC Logic .............................................................. 44
.
.
.

C1121, C1123, C1125, C1127 OUT ABS SOL... 46
Description ............................................................. 46
.
DTC Logic .............................................................. 46
.
.
.

C1130 ENGINE SIGNAL .................................. 48
.
Description ............................................................. 48
.
DTC Logic .............................................................. 48
.
.
.

C1142 PRESS SENSOR .................................. 49
.
Description ............................................................. 49
.
DTC Logic .............................................................. 49
.
.
.

C1143 STEERING ANGLE SENSOR ............... 51
.
Description ............................................................. 51
.
DTC Logic .............................................................. 51
.
.
.

C1144 INCOMPLETE STEERING ANGLE
SENSOR ADJUSTMENT .................................. 53
.
DTC Logic .............................................................. 53
.
.
.


POWER SUPPLY AND GROUND CIRCUIT .... 62
.
Description ............................................................. 62
.
.

PARKING BRAKE SWITCH ............................. 64
.
Description ............................................................. 64
.
.
.

VDC OFF SWITCH ........................................... 66
.
Description ............................................................. 66
.
.
.
.

ABS WARNING LAMP ..................................... 68
.
Description ............................................................. 68
.
Component Function Check .................................. 68
.
.
.

BRAKE WARNING LAMP ................................ 69
.
Description ............................................................. 69
.
.
.
.

VDC OFF INDICATOR LAMP .......................... 70
.
Description ............................................................. 70
.
.
.
.

SLIP INDICATOR LAMP .................................. 71
.
Description ............................................................. 71
.
.

BRC-2

2009 370Z

.
.

ECU DIAGNOSIS ........................................ 72
.
ABS ACTUATOR AND ELECTRIC UNIT
(CONTROL UNIT) .............................................72
.
Reference Value .................................................... 72
.
Wiring Diagram - BRAKE CONTROL SYSTEM -.... 76
Fail-Safe ................................................................. 79
.
DTC Inspection Priority Chart ................................ 80
.
DTC Index .............................................................. 81
.

SYMPTOM DIAGNOSIS ............................. 82
.
EXCESSIVE ABS FUNCTION OPERATION
FREQUENCY ....................................................82
.
.

UNEXPECTED PEDAL REACTION .................83
.

Precautions for Harness Repair .............................90
.

PREPARATION .......................................... 91
.

A

PREPARATION ................................................. 91
Special Service Tool ...............................................91
.

B

ON-VEHICLE REPAIR ................................ 92
.
WHEEL SENSOR .............................................. 92

C

FRONT WHEEL SENSOR ........................................92
.
FRONT WHEEL SENSOR : Exploded View ..........92
.
FRONT WHEEL SENSOR : Removal and Installation .......................................................................92
.

D

REAR WHEEL SENSOR ..........................................93
.
REAR WHEEL SENSOR : Exploded View .............93
.
REAR WHEEL SENSOR : Removal and Installation ..........................................................................93
.

.

FRONT SENSOR ROTOR ........................................94
.
FRONT SENSOR ROTOR : Exploded View ..........94
.
FRONT SENSOR ROTOR : Removal and Installation .......................................................................94
.

BRC

SENSOR ROTOR .............................................. 94

THE BRAKING DISTANCE IS LONG ...............84
.

E

.

ABS FUNCTION DOES NOT OPERATE ..........85
.
.

.

REAR SENSOR ROTOR ..........................................94
.
REAR SENSOR ROTOR : Exploded View .............94
.
REAR SENSOR ROTOR : Removal and Installation ..........................................................................94
.

VEHICLE JERKS DURING VDC/TCS/ABS
CONTROL .........................................................87
.

ABS ACTUATOR AND ELECTRIC UNIT
(CONTROL UNIT) ............................................. 95

.

Exploded View ........................................................95
.
Removal and Installation ........................................95
.

PEDAL VIBRATION OR ABS OPERATION
SOUND OCCURS .............................................86
.

NORMAL OPERATING CONDITION ................88
.
Description ............................................................. 88
.

Exploded View ........................................................97
.
.

PRECAUTIONS .................................................89
.

H

I

J

K

YAW RATE/SIDE G SENSOR .......................... 97

PRECAUTION ............................................. 89
.

G

STEERING ANGLE SENSOR ........................... 98

Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER" ................................................................ 89
.
Precaution for Procedure without Cowl Top Cover 89
....
Precaution for Brake System ................................. 89
.
Precaution for Brake Control .................................. 90
.

Exploded View ........................................................98
.
.

L

M

VDC OFF SWITCH ............................................ 99
.

N

O

P


BRC-3

2009 370Z

DIAGNOSIS AND REPAIR WORKFLOW
[VDC/TCS/ABS]

< BASIC INSPECTION >

BASIC INSPECTION
Work Flow

INFOID:0000000004497232

PRECAUTIONS FOR DIAGNOSIS
If steering angle sensor, steering system parts, suspension system parts, ABS actuator and electric unit (control unit) or tires have been replaced, or if wheel alignment has been adjusted, be sure to adjust neutral position of steering angle sensor before driving. Refer to BRC-8, "ADJUSTMENT OF STEERING ANGLE
SENSOR NEUTRAL POSITION : Description".


BRC-4

2009 370Z

[VDC/TCS/ABS]

OVERALL SEQUENCE

A

B

C

D

E

BRC

G

H

I

J

K

L

M

N

O
JSFIA0239GB

P

DETAILED FLOW

1.COLLECT THE INFORMATION FROM THE CUSTOMER
Get the detailed information from the customer about the symptom (the condition and the environment when
the incident/malfunction occurred) using the diagnosis work sheet. Refer to BRC-7, "Diagnostic Work Sheet".
>> GO TO 2.

BRC-5

2009 370Z

[VDC/TCS/ABS]


2.PERFORM THE SELF-DIAGNOSIS
Check the DTC display with the self-diagnosis function.
Is there any DTC displayed?
YES >> GO TO 3.
NO
>> GO TO 4.

3.PERFORM THE SYSTEM DIAGNOSIS
Perform the diagnosis applicable to the displayed DTC. Refer to BRC-81, "DTC Index".
>> GO TO 7.

4.CHECK THE SYMPTOM THAT IS NOT CONSIDERED A SYSTEM MALFUNCTION
Check that the symptom is a normal operation that is not considered a system malfunction. Refer to BRC-88,
"Description".
Is the symptom a normal operation?
YES >> INSPECTION END
NO
>> GO TO 5.

5.CHECK THE WARNING LAMP AND INDICATOR LAMP FOR ILLUMINATION
Check that the warning lamp and indicator lamp illuminate.
• ABS warning lamp: refer to BRC-68, "Description".
• Brake warning lamp: refer to BRC-69, "Description".
• VDC OFF indicator lamp: refer to BRC-70, "Description".
• SLIP indicator lamp: refer to BRC-71, "Description".
Is ON/OFF timing normal?
YES >> GO TO 6.
NO
>> GO TO 2.

6.PERFORM THE DIAGNOSIS BY SYMPTOM
Perform the diagnosis applicable to the symptom.
>> GO TO 7.

7.REPAIR OR REPLACE THE MALFUNCTIONING PARTS
Repair or replace the specified malfunctioning parts.
>> GO TO 8.

8.MEMORY CLEAR
Perform self-diagnosis memory clear.
>> GO TO 9.

9.FINAL CHECK
Perform the self-diagnosis again, and check that the malfunction is repaired completely.
Is no other DTC present and the repair completed?
NO
>> GO TO 3.


BRC-6

2009 370Z

[VDC/TCS/ABS]


Diagnostic Work Sheet

INFOID:0000000004497233

A

B

C

D

E

BRC

G

H

I

SFIA3265E

J

K

L

M

N

O

P


BRC-7

2009 370Z

INSPECTION AND ADJUSTMENT
[VDC/TCS/ABS]


ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Description
INFOID:0000000004497234

After replacing the ABS actuator and electric unit (control unit), perform the neutral position adjustment for the
steering angle sensor.

ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement

INFOID:0000000004497235

1.PERFORM THE NEUTRAL POSITION ADJUSTMENT FOR THE STEERING ANGLE SENSOR
Perform the neutral position adjustment for the steering angle sensor.
>> Refer to BRC-8, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Special Repair Requirement".

ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Description
INFOID:0000000004497236

When doing work that applies to the list below, make sure to adjust neutral position of steering angle sensor
before running vehicle.
×: Required –: Not required

Situation

Adjustment of steering angle sensor neutral position

Removing/Installing ABS actuator and electric unit (control unit)

—

Replacing ABS actuator and electric unit (control unit)

×

Removing/Installing steering angle sensor

×

Replacing steering angle sensor

×

Removing/Installing steering components

×

Replacing steering components

×

Removing/Installing suspension components

×

Replacing suspension components

×

Removing/Installing tire

—

Change tires to new ones

—

Tire rotation

—

Adjusting wheel alignment

×

ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Special Repair Requirement

INFOID:0000000004497237

ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
CAUTION:
To adjust neutral position of steering angle sensor, make sure to use CONSULT-III.
(Adjustment cannot be done without CONSULT-III.)

1.ALIGN THE VEHICLE STATUS
Stop vehicle with front wheels in straight-ahead position.
>> GO TO 2.

2.PERFORM THE NEUTRAL POSITION ADJUSTMENT FOR THE STEERING ANGLE SENSOR

BRC-8

2009 370Z

[VDC/TCS/ABS]
1. On the CONSULT-III screen, touch "WORK SUPPORT" and “ST ANGLE SENSOR ADJUSTMENT" in
order.
2. Touch “START”.
CAUTION:
Never touch steering wheel while adjusting steering angle sensor.
3. After approximately 10 seconds, touch “END”.
NOTE:
After approximately 60 seconds, it ends automatically.
4. Turn the ignition switch OFF, then turn it ON again.
CAUTION:
Be sure to perform above operation.

A

B

C

D

>> GO TO 3.

3.CHECK DATA MONITOR
1.
2.

E

Run the vehicle with front wheels in straight-ahead position, then stop.
Select “STR ANGLE SIG” in “DATA MONITOR” and check steering angle sensor signal.
STR ANGLE SIG

BRC

: 0±2.5°

Is the steering angle within the specified range?
YES >> GO TO 4.
NO
>> Perform the neutral position adjustment for the steering angle sensor again, GO TO 1.

G

4.ERASE THE SELF-DIAGNOSIS MEMORY
H

Erase the self-diagnosis memories of the ABS actuator and electric unit (control unit), and ECM.
• ABS actuator and electric unit (control unit): refer to BRC-22, "CONSULT-III Function".
• ECM: refer to EC-115, "Diagnosis Description".
Are the memories erased?
NO
>> Check the items indicated by the self-diagnosis.

I

J

K

L

M

N

O

P


BRC-9

2009 370Z

VDC
[VDC/TCS/ABS]

< FUNCTION DIAGNOSIS >

FUNCTION DIAGNOSIS
VDC
System Diagram

INFOID:0000000004497238

JPFIC0018GB

System Description

INFOID:0000000004497239

• Vehicle Dynamics Control system detects driver′s steering operation amount and brake pedal travel from
steering angle sensor and pressure sensor. Using information from yaw rate/side G sensor and wheel sensor, VDC judges driving condition (conditions of under steer and over steer) to improve vehicle driving stability by controlling brake application to 4 wheels and engine output.
• During VDC operation, it informs driver of system operation by flashing SLIP indicator lamp.
• Electrical system diagnosis by CONSULT-III is available.


BRC-10

2009 370Z

VDC
[VDC/TCS/ABS]


Component Parts Location

INFOID:0000000004497240

A

B

C

D

E

BRC

G

H

I

J

K

L

JPFIC0019ZZ

1.

Steering angle sensor

2.

Front wheel sensor

4.

Yaw rate/side G sensor

5.

Rear wheel sensor

A.

Back of spiral cable assembly

B.

Steering knuckle

D.

Inside brake master cylinder cover

G.

E.

VDC OFF switch: IP-11, "Exploded
View"

3.

C.

ABS warning lamp, brake warning
lamp, VDC OFF indicator lamp, SLIP
indicator lamp: MWI-6, "METER
SYSTEM : System Description"

Rear final drive assembly

Component Description


F.

ABS actuator and electric unit (control unit)

M

Under center console

O

P

INFOID:0000000004497241

BRC-11

N

2009 370Z

VDC
[VDC/TCS/ABS]

Component parts

Reference

Pump

BRC-36, "Description"

Motor
Actuator relay (main relay)

Solenoid valve

BRC-44, "Description", BRC-46, "Description"

Pressure sensor


VDC switch-over valve
(USV1, USV2, HSV1, HSV2)


Wheel sensor






VDC OFF switch


ABS warning lamp


Brake warning lamp


VDC OFF indicator lamp


SLIP indicator lamp



BRC-12

2009 370Z

TCS
[VDC/TCS/ABS]


TCS

A

System Diagram

INFOID:0000000004512083

B

C

D

E

BRC

G

H

I
JPFIC0018GB

System Description

INFOID:0000000004497243

• Traction Control System is a function that electronically controls engine torque, brake fluid pressure and A/T
gear position to ensure the optimum slippage ratio at drive wheels by computing wheel speed signals from 4
wheel sensors. When ABS actuator and electric unit (control unit) detects a spin at drive wheels (rear
wheels), it compares wheel speed signals from all 4 wheels. At this time, LH and RH rear brake fluid pre sure
are controlled, while fuel being cut to engine and throttle valve being closed to reduce engine torque by the
control unit. Further more, throttle position is continuously controlled to ensure the optimum engine torque at
all times.
• During TCS operation, TCS informs driver of system operation by flashing SLIP indicator lamp.

J

K

L

M

N

O

P


BRC-13

2009 370Z

TCS
[VDC/TCS/ABS]



INFOID:0000000004512084

JPFIC0019ZZ

1.


2.

Front wheel sensor

3.


4.


5.

Rear wheel sensor

A.


B.

Steering knuckle

C.


D.


E.

View"

F.


G.




INFOID:0000000004512085

BRC-14

2009 370Z

TCS
[VDC/TCS/ABS]

Component parts

Reference

A

Pump


Motor

Solenoid valve


B


Pressure sensor




C

Wheel sensor






VDC OFF switch


ABS warning lamp


Brake warning lamp




SLIP indicator lamp


D

E

BRC

G

H

I

J

K

L

M

N

O

P


BRC-15

2009 370Z

ABS
[VDC/TCS/ABS]


ABS
System Diagram

INFOID:0000000004512086

JPFIC0018GB

System Description

INFOID:0000000004497247

• Anti-Lock Braking System detects wheel revolution while braking, electronically controls braking force, and
prevents wheel locking during sudden braking. It improves handling stability and maneuverability for avoiding obstacles.


BRC-16

2009 370Z

ABS
[VDC/TCS/ABS]



INFOID:0000000004512087

A

B

C

D

E

BRC

G

H

I

J

K

L

JPFIC0019ZZ

1.


2.

Front wheel sensor

4.


5.

Rear wheel sensor

A.


B.

Steering knuckle

D.


G.

E.

View"

3.

C.





F.


M


O

P

INFOID:0000000004512088

BRC-17

N

2009 370Z

ABS
[VDC/TCS/ABS]

Component parts

Reference

Pump


Motor

Solenoid valve


Pressure sensor




Wheel sensor






VDC OFF switch


ABS warning lamp


Brake warning lamp




SLIP indicator lamp



BRC-18

2009 370Z

EBD
[VDC/TCS/ABS]


EBD

A

System Diagram

INFOID:0000000004512089

B

C

D

E

BRC

G

H

I
JPFIC0018GB

System Description

INFOID:0000000004497251

• Electric Brake force Distribution is a following function. ABS actuator and electric unit (control unit) detects
subtle slippages between the front and rear wheels during braking. Then is electronically controls the rear
braking force (brake fluid pressure) to reducing and reduces rear wheel slippage. Accordingly it improves
vehicle stability.

J

K

L

M

N

O

P


BRC-19

2009 370Z

EBD
[VDC/TCS/ABS]



INFOID:0000000004512090

JPFIC0019ZZ

1.


2.

Front wheel sensor

3.


4.


5.

Rear wheel sensor

A.


B.

Steering knuckle

C.


D.


E.

View"

F.


G.




INFOID:0000000004512091

BRC-20

2009 370Z

EBD
[VDC/TCS/ABS]

Component parts

Reference

A

Pump


Motor

Solenoid valve


B


Pressure sensor




C

Wheel sensor






VDC OFF switch


ABS warning lamp


Brake warning lamp




SLIP indicator lamp


D

E

BRC

G

H

I

J

K

L

M

N

O

P


BRC-21

2009 370Z

DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL
UNIT)]
[VDC/TCS/ABS]


UNIT)]
CONSULT-III Function

INFOID:0000000004497254

FUNCTION
CONSULT-III can display each diagnostic item using the diagnostic test modes shown following.
Diagnostic test mode

Function

Work support

This mode enables a technician to adjust some devices faster and more accurately by following
the indications on CONSULT-III.

Self diagnostic result

Self-diagnostic results can be read and erased quickly.

Data monitor

Input/Output data in the ABS actuator and electric unit (control unit) can be read.

Active test

CONSULT-III drives some actuators apart from ABS actuator and electric unit (control unit) and
also shifts some parameters in a specified range.

ECU identification

ABS actuator and electric unit (control unit) part number can be read.

WORK SUPPORT
Item
ST ANGLE SENSOR ADJUSTMENT

Description
Adjusts the neutral position of the steering angle sensor.

SELF DIAGNOSTIC RESULT
Operation Procedure
Before performing the self-diagnosis, start engine and drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute.
Display Item List
Refer to BRC-81, "DTC Index".
How to Erase Self-diagnosis Results
After erasing DTC memory, start the engine and drive the vehicle at 30 km/h (19 MPH) or more for approximately 1 minute as the final inspection, and make sure that the ABS warning lamp, VDC OFF indicator lamp,
SLIP indicator lamp and brake warning lamp turn OFF.
CAUTION:
If memory cannot be erased, perform applicable diagnosis.
NOTE:
• When the wheel sensor malfunctions, after inspecting the wheel sensor system, ABS warning lamp, VDC
OFF indicator lamp, SLIP indicator lamp and brake warning lamp will not turn OFF even when the system is
normal unless the vehicle is driven at approximately 30 km/h (19 MPH) or more for approximately 1 minute.
• Brake warning lamp will turn ON in case of parking brake operation (when switch is ON) or in case of brake
fluid level switch operation (when brake fluid is insufficient).
• VDC OFF switch should not stay “ON” position.

DATA MONITOR MODE
Display Item List


BRC-22

2009 370Z

UNIT)]
[VDC/TCS/ABS]


×: Applicable

: Optional item

A

SELECT MONITOR ITEM
Monitor item (Unit)

ECU INPUT
SIGNALS

MAIN SIGNALS

FR LH SENSOR
[km/h (MPH)]

×

×

FR RH SENSOR
[km/h (MPH)]

×

×

RR LH SENSOR
[km/h (MPH)]

×

×

RR RH SENSOR
[km/h (MPH)]

×

Remarks

×

B

C

Wheel speed

FR RH IN SOL
(On/Off) (Note 1)

×

FR RH OUT SOL
(On/Off) (Note 1)

×

FR LH IN SOL
(On/Off) (Note 1)

×

FR LH OUT SOL
(On/Off) (Note 1)

×

RR RH IN SOL
(On/Off) (Note 1)

×

RR RH OUT SOL
(On/Off) (Note 1)

×

RR LH IN SOL
(On/Off) (Note 1)

×

RR LH OUT SOL
(On/Off) (Note 1)

D

×

STOP LAMP SW
(On/Off)

E

BRC

G

Operation status of each solenoid valve

H

I

×

Stop lamp switch signal status

MOTOR RELAY
(On/Off)

×

Motor and motor relay operation

ACTUATOR RLY
(On/Off) (Note 1)

×

Actuator relay operation

ABS WARN LAMP
(On/Off)

×

ABS warning lamp

OFF LAMP
(On/Off)

×


×

VDC OFF switch

×

SLIP indicator lamp

OFF SW
(On/Off)

×

J

K

L

M
×

SLIP LAMP
(On/Off)

N

BATTERY VOLT
(V)

×

×

Battery voltage supplied to the ABS actuator and electric unit (control
unit)

YAW RATE SEN
(d/s)

×

×

Yaw rate detected by yaw rate/side G sensor

ACCEL POS SIG
(%)

×

Throttle actuator opening/closing is displayed (Linked with accelerator pedal)

×

Transverse G detected by yaw rate/side G sensor

STR ANGLE SIG
(°)

×

Steering angle detected by steering angle sensor

PRESS SENSOR
(bar)

×

Brake fluid pressure detected by pressure sensor

SIDE G-SENSOR
(m/s2)


O

BRC-23

2009 370Z

P

UNIT)]
[VDC/TCS/ABS]

SELECT MONITOR ITEM
Monitor item (Unit)

ECU INPUT
SIGNALS

Remarks

MAIN SIGNALS

EBD SIGNAL
(On/Off)

EBD operation

ABS SIGNAL
(On/Off)

ABS operation

TCS SIGNAL
(On/Off)

TCS operation

VDC SIGNAL
(On/Off)

VDC operation

EBD FAIL SIG
(On/Off)

EBD fail-safe signal

ABS FAIL SIG
(On/Off)

ABS fail-safe signal

TCS FAIL SIG
(On/Off)

TCS fail-safe signal

VDC FAIL SIG
(On/Off)

VDC fail-safe signal

CRANKING SIG
(On/Off)

Crank operation

FLUID LEV SW
(On/Off)

×

Brake fluid level switch signal status

PARK BRAKE SW
(On/Off)

×

Parking brake switch signal status

USV [FR-RL]
(On/Off)
USV [FL-RR]
(On/Off)


HSV [FR-RL]
(On/Off)
HSV [FL-RR]
(On/Off)
V/R OUTPUT
(On/Off)

Solenoid valve relay activated

M/R OUTPUT
(On/Off)

Actuator motor and motor relay activated

ENGINE RPM
[tr/min (rpm)]

×

Engine speed

NOTE:
1: A brief moment of On/Off condition occurs every 20 seconds after ignition switch turned ON. This is not malfunction because it is a operation for checking.

ACTIVE TEST MODE
CAUTION:
• Never perform active test while driving vehicle.
• Make sure to completely bleed air from brake system.
• The active test cannot be started when ABS warning lamp, VDC OFF indicator lamp, SLIP indicator
lamp and brake warning lamp are ON.
• ABS warning lamp, VDC OFF indicator lamp, SLIP indicator lamp and brake warning lamp are ON
during active test.
NOTE:
• When active test is performed while depressing the pedal, the pedal depression amount will change. This is
normal. (Only solenoid valve and ABS motor.)
• “TEST IS STOPPED” is displayed 10 seconds after operation start.
• After “TEST IS STOPPED” is displayed, to perform test again.

BRC-24

2009 370Z

UNIT)]
[VDC/TCS/ABS]

Test Item

A

ABS SOLENOID VALVE

• Touch “Up”, “Keep” and “Down”. Then use screen monitor to check that solenoid valve operates as shown in
the table below.
B
Test item

Display item

Display (Note)

On

On

FR RH OUT SOL

Off

Off

On*

USV [FR-RL]

Off

Off

Off

Off

Off

Off

Off

On

On

FR LH OUT SOL

Off

Off

On*

USV [FL-RR]

Off

Off

Off

HSV [FL-RR]

Off

Off

Off

RR RH IN SOL

Off

On

On

RR RH OUT SOL

Off

Off

On*

USV [FL-RR]

Off

Off

Off

HSV [FL-RR]

Off

Off

Off

RR LH IN SOL

Off

On

On

RR LH OUT SOL

Off

Off

On*

USV [FR-RL]

Off

Off

Off

HSV [FR-RL]

RR LH SOL

Off

FR LH IN SOL

RR RH SOL

Down

HSV [FR-RL]

FR LH SOL

Keep

FR RH IN SOL
FR RH SOL

Up

Off

Off

Off

C

D

E

BRC

G

H

I

*: On for 1 to 2 seconds after the touch, and then Off.
NOTE:
A brief moment of On/Off condition occurs every 20 seconds after ignition switch turned ON. This is not malfunction because it is an
operation for checking.

ABS SOLENOID VALVE (ACT)

• Touch “Up”, “ACT UP” and “ACT KEEP”. Then use screen monitor to check that solenoid valve operates as
shown in the table below.
Test item

Display item

Up

ACT UP

ACT KEEP

Off

Off

Off

FR RH OUT SOL

Off

Off

Off

USV [FR-RL]

Off

On

On

HSV [FR-RL]

Off

On*

Off

FR LH IN SOL

Off

Off

Off

FR LH OUT SOL

Off

Off

Off

USV [FL-RR]

Off

On

On

HSV [FL-RR]

FR LH ABS SOLENOID
(ACT)

Off

On*

Off

RR RH IN SOL


Off

Off

Off

RR RH OUT SOL

Off

Off

Off

USV [FL-RR]

Off

On

On

HSV [FL-RR]

RR RH ABS SOLENOID
(ACT)

K

L

Display (Note)

FR RH IN SOL
FR RH ABS SOLENOID
(ACT)

J

Off

On*

Off

BRC-25

2009 370Z

M

N

O

P

UNIT)]
[VDC/TCS/ABS]

Test item

Display (Note)

Display item

ACT UP

ACT KEEP

RR LH IN SOL

Off

Off

Off

RR LH OUT SOL

RR LH ABS SOLENOID
(ACT)

Up

Off

Off

Off

USV [FR-RL]

Off

On

On

HSV [FR-RL]

Off

On*

Off

*: On for 1 to 2 seconds after the touch, and then Off.
NOTE:

ABS MOTOR

• Touch “On” and “Off” on screen. Make sure motor relay and actuator relay operates as shown in table below.

Test item

ABS MOTOR

Display item

Display
On

Off

MOTOR RELAY

On

Off

ACTUATOR RLY (Note)

On

On

NOTE:

ECU IDENTIFICATION
ABS actuator and electric unit (control unit) part number can be read.


BRC-26

2009 370Z

C1101, C1102, C1103, C1104 WHEEL SENSOR
[VDC/TCS/ABS]

< COMPONENT DIAGNOSIS >

COMPONENT DIAGNOSIS

A

Description

INFOID:0000000004497255

When the sensor rotor rotates, the magnetic field changes. It converts the magnetic field changes to current
signals (rectangular wave) and transmits them to the ABS actuator and electric unit (control unit).

DTC Logic

C

INFOID:0000000004497256

DTC DETECTION LOGIC
DTC

B

D

Display item

Malfunction detected condition

C1101

RR RH SENSOR-1

Circuit of rear RH wheel sensor is open. Or when the sensor power voltage is outside the standard.

C1102

RR LH SENSOR-1

Circuit of rear LH wheel sensor is open. Or when the sensor power voltage is outside the standard.

C1103

FR RH SENSOR-1

Circuit of front RH wheel sensor is open. Or when the
sensor power voltage is outside the standard.

C1104

FR LH SENSOR-1

Possible cause

Circuit of front LH wheel sensor is open. Or when the
sensor power voltage is outside the standard.

E
• Harness or connector
• Wheel sensor
• ABS actuator and electric unit
(control unit)

BRC

G

DTC CONFIRMATION PROCEDURE

1.DTC REPRODUCTION PROCEDURE

H

1. Start the engine and drive the vehicle at 30 km/h (19 MPH) or more for approximately 1 minute.
2. Perform ABS actuator and electric unit (control unit) self-diagnosis.
Is DTC “C1101”, “C1102”, “C1103” or “C1104” detected?
YES >> Proceed to diagnosis procedure. Refer to BRC-27, "Diagnosis Procedure".
NO
>> INSPECTION END

Diagnosis Procedure

I

J

INFOID:0000000004497257

CAUTION:
Never check between wheel sensor harness connector terminals.

K

1.CHECK TIRES
L

Check air pressure, wear and size. Refer to WT-99, "Tire Air Pressure".
Is the inspection result normal?
YES >> GO TO 2.
NO
>> Adjust air pressure or replace error-detected parts.

M

2.CHECK SENSOR AND SENSOR ROTOR
• Check sensor rotor for damage.
- Front: refer to BRC-94, "FRONT SENSOR ROTOR : Exploded View".
- Rear: refer to BRC-94, "REAR SENSOR ROTOR : Exploded View".
• Check wheel sensor for damage, disconnection or looseness.
YES >> GO TO 3.
NO
>> Repair wheel sensor mount or replace sensor rotor.

N

O

P

3.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect ABS actuator and electric unit (control unit) harness connector.
3. Disconnect wheel sensor harness connector.
4. Check connector and terminal to see if it is deformed, disconnected, looseness, etc.

BRC-27

2009 370Z

[VDC/TCS/ABS]

YES >> GO TO 4.
NO
>> Repair or replace error-detected parts.

4.CHECK WHEEL SENSOR HARNESS
1.

Check the continuity between ABS actuator and electric unit (control unit) harness connector and wheel
sensor harness connector. (Also check continuity when steering wheel is turned right and left and when
sensor harness inside the wheel house is moved.)
Measurement connector and terminal for power supply circuit

Connector

Wheel sensor
Connector

9

Terminal

26

E60 (Front LH)

7

B33 (Rear RH)

Continuity

E27 (Front RH)

6

E41

Terminal

B34 (Rear LH)

1

Existed

Measurement connector and terminal for signal circuit

Connector

Wheel sensor

5

E60 (Front LH)

29

Terminal

B33 (Rear RH)

Continuity

E27 (Front RH)

27

2.

Connector

10
E41

Terminal

B34 (Rear LH)

2

Existed

Check the continuity between ABS actuator and electric unit (control unit) harness connector.
Connector

Terminal

Connector

Terminal

E41

1, 4

Continuity

9, 10
E41

26, 5
7, 29

Not existed

6, 27

YES >> GO TO 5.
NO

5.REPLACE WHEEL SENSOR
1.
2.
3.
4.

Replace wheel sensor.
Erase ABS actuator and electric unit (control unit) self-diagnosis results.
Turn the ignition switch OFF.
Turn the ignition switch ON.
CAUTION:
Never start the engine.
YES >> Replace ABS actuator and electric unit (control unit). Refer to BRC-95, "Exploded View"
NO
>> INSPECTION END

Special Repair Requirement

INFOID:0000000004497259

1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
Always perform the neutral position adjustment for the steering angle sensor, when replacing the ABS actuator and electric unit (control unit) or steering angle sensor and removing steering angle sensor. Refer to BRC8, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Special Repair Requirement"


BRC-28

2009 370Z

[VDC/TCS/ABS]

>> END

A

B

C

D

E

BRC

G

H

I

J

K

L

M

N

O

P


BRC-29

2009 370Z

[VDC/TCS/ABS]


Description

INFOID:0000000004497260


DTC Logic

INFOID:0000000004497261

DTC DETECTION LOGIC
DTC

Display item


RR RH SENSOR-2

When the circuit in the rear RH wheel sensor is short-circuited. Or when the distance between the wheel sensor
and sensor rotor is too large and the sensor pulse cannot
be recognized by the control unit.

C1106

RR LH SENSOR-2

When the circuit in the rear LH wheel sensor is short-circuited. Or when the distance between the wheel sensor

C1107

FR RH SENSOR-2

When the circuit in the front RH wheel sensor is short-circuited. Or when the distance between the wheel sensor

FR LH SENSOR-2

Possible cause

When the circuit in the front LH wheel sensor is short-circuited. Or when the distance between the wheel sensor

C1105

C1108

• Wheel sensor
(control unit)


Is DTC “C1105”, “C1106”, “C1107”, or “C1108” detected?
NO
>> INSPECTION END

Diagnosis Procedure

INFOID:0000000004513170

CAUTION:

1.CHECK TIRES
YES >> GO TO 2.
NO

YES >> GO TO 3.
NO

3.CHECK CONNECTOR
1.



BRC-30

2009 370Z

YES >> GO TO 4.
NO

[VDC/TCS/ABS]
A

B

1.


D


Connector

Wheel sensor

Terminal

Connector

9

Terminal

26

E60 (Front LH)

7

B33 (Rear RH)

Continuity

E27 (Front RH)

6

E41

B34 (Rear LH)

1

E
Existed


Connector

Connector

5

E60 (Front LH)

29

Terminal

B33 (Rear RH)

Continuity

E27 (Front RH)

27

2.

Terminal

BRC

G

Wheel sensor

10
E41

C

B34 (Rear LH)

H
2

Existed

I

J

Connector

Terminal

Connector

Terminal

Continuity

9, 10
E41

K

26, 5

E41

7, 29

1, 4

Not existed

L

6, 27

YES >> GO TO 5.
NO

M

1.
2.
3.
4.

CAUTION:
NO
>> INSPECTION END


INFOID:0000000004512093


BRC-31

2009 370Z

N

O

P

[VDC/TCS/ABS]
>> END


BRC-32

2009 370Z

C1109 POWER AND GROUND SYSTEM
[VDC/TCS/ABS]



A

Description

INFOID:0000000004497265

Supplies electric power to the ABS actuator and electric unit (control unit).

B

DTC Logic

INFOID:0000000004497266

C

DTC DETECTION LOGIC
DTC

Display item

C1109


BATTERY VOLTAGE
[ABNORMAL]

Possible cause

When the ABS actuator and electric unit (control unit)
power supply voltage is lower than normal.

(control unit)
• IPDM E/R

D

E



BRC

1. Turn the ignition switch ON.
Is DTC “C1109” detected?
NO
>> INSPECTION END

Diagnosis Procedure

G

INFOID:0000000004497267

H

1.CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY
1.
2.
3.

Disconnect ABS actuator and electric unit (control unit) harness connector.
Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.

I

J
Connector
E41

4.

Terminal
28

—

Condition

Voltage

Ground

Ignition switch: OFF

Approx. 0 V

K

L


5.

CAUTION:
Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.

M

Connector

Terminal

E41

28

—

Condition

Voltage

Ground

Ignition switch: ON

Battery voltage

YES >> GO TO 3.
NO
>> GO TO 2.

2.CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY CIRCUIT
1.
2.
3.

Disconnect IPDM E/R harness connector.
Check continuity between ABS actuator and electric unit (control unit) harness connector and IPDM E/R
harness connector.

IPDM E/R

Connector

Terminal

Connector

Terminal

E41

28

E5

25


BRC-33

Continuity
Existed

2009 370Z

N

O

P

[VDC/TCS/ABS]
YES >> Perform the trouble diagnosis for ignition power supply circuit. Refer to PG-42, "Wiring Diagram IGNITION POWER SUPPLY -".
NO

3.CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND
Check continuity between ABS actuator and electric unit (control unit) harness connector and ground.
Connector
E41

—

Continuity

Ground

Existed

Terminal
1
4

YES >> Replace ABS actuator electric unit (control unit). Refer to BRC-95, "Exploded View".
NO


INFOID:0000000004512094

>> END


BRC-34

2009 370Z

C1110, C1153, C1170 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
[VDC/TCS/ABS]


C1110, C1153, C1170 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL
UNIT)
DTC Logic

A

INFOID:0000000004497269

B

DTC DETECTION LOGIC
DTC

Display item


C1110

CONTROLLER FAILURE
EMERGENCY BRAKE

When ABS actuator and electric unit (control unit) is malfunctioning. (Pressure increase is too much or too little)

C1170

VARIANT CODING

In a case where VARIANT CODING is different.

C

When there is an internal malfunction in the ABS actuator
and electric unit (control unit).

C1153

Possible cause

ABS actuator and electric unit
(control unit)

D

E



BRC

Is DTC “C1110”, “C1153” or “C1170” detected?
NO
>> INSPECTION END

Diagnosis Procedure

G

INFOID:0000000004497270

H

1.REPLACE ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
CAUTION:
Replace ABS actuator and electric unit (control unit) when self-diagnostic result shows items other
than those applicable.

I

J

>> Replace ABS actuator and electric unit (control unit). Refer to BRC-95, "Exploded View".


INFOID:0000000004512095

K


L

M

>> END

N

O

P


BRC-35

2009 370Z

C1111 ABS MOTOR, MOTOR RELAY SYSTEM
[VDC/TCS/ABS]


Description

INFOID:0000000004497272

PUMP
The pump returns the brake fluid stored in the reservoir to the master cylinder by reducing the pressure.

MOTOR
The motor drives the pump according to the signals transmitted by the ABS actuator and electric unit (control
unit).

MOTOR RELAY
Activates or deactivates motor according to the signals transmitted by the ABS actuator and electric unit (control unit).

DTC Logic

INFOID:0000000004497273

DTC DETECTION LOGIC
DTC

C1111

Display item

During the actuator motor operating with ON, when the
actuator motor turns OFF, or when the control line for actuator motor relay is open.

PUMP MOTOR

During the actuator motor operating with OFF, when the
actuator motor turns ON, or when the control line for relay
is shorted to ground.

Possible cause

(control unit)


NO
>> INSPECTION END

Diagnosis Procedure

INFOID:0000000004497274

1.CHECK ABS MOTOR AND MOTOR RELAY POWER SUPPLY
1.
2.
3.
4.

Check the 50A fuse (H).
Check voltage between the ABS actuator and electric unit (control unit) harness connector and ground.
Connector

Terminal

E41

2

—

Voltage

Ground

Battery voltage

YES >> GO TO 2.
NO

2.CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND


BRC-36

2009 370Z

[VDC/TCS/ABS]

Connector
E41

Terminal
1
4

A
—

Continuity

Ground

Existed

B

YES >> Replace ABS actuator and electric unit (control unit). Refer to BRC-95, "Exploded View".
NO


C

INFOID:0000000004512096

D


E

BRC

>> END

G

H

I

J

K

L

M

N

O

P


BRC-37

2009 370Z

C1114 ACTUATOR RELAY SYSTEM
[VDC/TCS/ABS]


Description

INFOID:0000000004497277

Activates or deactivates each solenoid valve according to the signals transmitted by the ABS actuator and
electric unit (control unit).

DTC Logic

INFOID:0000000004497278

DTC DETECTION LOGIC
DTC

C1114

Display item

During the actuator relay operating with OFF, when the
actuator relay turns ON, or when the control line for the
relay is shorted to the ground.

MAIN RELAY

During the actuator relay operating with ON, when the
actuator relay turns ON, or when the control line for the
relay is open.

Possible cause

(control unit)


NO
>> INSPECTION END

Diagnosis Procedure

INFOID:0000000004497279

1.CHECK ACTUATOR RELAY POWER SUPPLY
1.
2.
3.

Check voltage between ABS actuator and electric unit (control unit) harness connector and ground.
Connector

Terminal

E41

3

—

Voltage

Ground

Battery voltage

YES >> GO TO 2.
NO

2.CHECK ACTUATOR RELAY GROUND
Connector
E41

Terminal
1
4

—

Continuity

Ground

Existed

NO


BRC-38

2009 370Z

[VDC/TCS/ABS]



INFOID:0000000004512097

A


B

C

>> END

D

E

BRC

G

H

I

J

K

L

M

N

O

P


BRC-39

2009 370Z

C1115 WHEEL SENSOR
[VDC/TCS/ABS]


C1115 WHEEL SENSOR
Description

INFOID:0000000004497282


DTC Logic

INFOID:0000000004497283

DTC DETECTION LOGIC
DTC

C1115

Display item
ABS SENSOR
[ABNORMAL SIGNAL]


When wheel sensor input signal is malfunctioning.

Possible cause
• Wheel sensor
(control unit)


NO
>> INSPECTION END

Diagnosis Procedure

INFOID:0000000004513172

CAUTION:

1.CHECK TIRES
YES >> GO TO 2.
NO

YES >> GO TO 3.
NO

3.CHECK CONNECTOR
YES >> GO TO 4.
NO

1.



BRC-40

2009 370Z

C1115 WHEEL SENSOR
[VDC/TCS/ABS]


Connector

Wheel sensor
Connector

9

Terminal

26

E60 (Front LH)

7

B33 (Rear RH)

Continuity

B34 (Rear LH)

A

E27 (Front RH)

6

E41

Terminal

B
1

Existed

C


Connector

Wheel sensor

E60 (Front LH)

29

Terminal

B33 (Rear RH)

Continuity

B34 (Rear LH)

2

Existed

Terminal

Connector

Terminal

E41

1, 4

E

BRC


Connector

D

E27 (Front RH)

5

27

2.

Connector

10
E41

Terminal

Continuity

G

9, 10
E41

26, 5
7, 29

Not existed

H

6, 27

YES >> GO TO 5.
NO

I


J

1.
2.
3.
4.

K

CAUTION:
NO
>> INSPECTION END


L

M

INFOID:0000000004512098

N


P

>> END


O

BRC-41

2009 370Z

C1116 STOP LAMP SWITCH
[VDC/TCS/ABS]


Description

INFOID:0000000004497287

The stop lamp switch transmits the stop lamp switch signal (ON/OFF) to the ABS actuator and electric unit
(control unit).

DTC Logic

INFOID:0000000004497288

DTC DETECTION LOGIC
DTC

Display item

C1116


STOP LAMP SW

Possible cause
• Stop lamp switch
(control unit)

When stop lamp switch circuit is open.


NO
>> INSPECTION END

Diagnosis Procedure

INFOID:0000000004497289

1.CHECK STOP LAMP SWITCH SIGNAL
1.
2.
3.

Connector
E41

30

Condition

Terminal

Voltage

Brake pedal is depressed

Battery voltage

Brake pedal is released

Approx. 0 V

NO
>> GO TO 2.

2.CHECK STOP LAMP SWITCH
Check stop lamp switch. Refer to BRC-43, "Component Inspection".
YES >> GO TO 3.
NO
>> Repair stop lamp switch. Refer to BR-18, "Exploded View".

3.CHECK STOP LAMP SWITCH CIRCUIT (1)
Check continuity between stop lamp switch harness connector and ABS actuator electric unit (control unit)
harness connector.
Stop lamp switch

ABS actuator electric unit (control unit)

Connector

Terminal

Connector

Terminal

E110

2

E41

30

Continuity
Existed

YES >> GO TO 4.

BRC-42

2009 370Z

[VDC/TCS/ABS]

NO

4.CHECK STOP LAMP SWITCH CIRCUIT (2)

A

1.
2.
3.
4.

B

Check the 10A fuse (#7).
Check continuity between stop lamp switch harness connector and battery positive terminal.
Disconnect fuse block connector M1.
Check the harness for open between stop lamp switch harness connector and fuse block harness connector.

C
Stop lamp switch

Fuse block

Continuity

Connector

Terminal

Connector

Terminal

E110

1

M1

8F

Existed

YES >> Perform the trouble diagnosis for power supply circuit. Refer to PG-6, "Wiring Diagram - BATTERY POWER SUPPLY -".
NO

Component Inspection

INFOID:0000000004497290

D

E

BRC

1.
2.
3.

G

Disconnect stop lamp switch harness connector.
Check continuity between stop lamp switch harness connector terminals.

H
Stop lamp switch
Terminal

1–2

Condition

Continuity

Release stop lamp switch
(When brake pedal is depressed.)

Existed

Push stop lamp switch
(When brake pedal is released.)

I

J

Not existed

NO
>> Replace stop lamp switch. Refer to BR-18, "Exploded View".


K
INFOID:0000000004512099

L


M

N

>> END

O

P


BRC-43

2009 370Z

C1120, C1122, C1124, C1126 IN ABS SOL
[VDC/TCS/ABS]


C1120, C1122, C1124, C1126 IN ABS SOL
Description

INFOID:0000000004497292

The solenoid valve increases, holds or decreases the fluid pressure of each brake caliper according to the signals transmitted by the ABS actuator and electric unit (control unit).

DTC Logic

INFOID:0000000004497293

DTC DETECTION LOGIC
DTC

Display item


C1120

FR LH IN ABS SOL

When the control unit detects a malfunction in the front
LH inlet solenoid circuit.

C1122

FR RH IN ABS SOL

RH inlet solenoid circuit.

C1124

RR LH IN ABS SOL

When the control unit detects a malfunction in the rear LH
inlet solenoid circuit.

C1126

RR RH IN ABS SOL

Possible cause

When the control unit detects a malfunction in the rear
RH inlet solenoid circuit.

ABS actuator and electric unit
(control unit)


NO
>> INSPECTION END

Diagnosis Procedure

INFOID:0000000004515372

1.CHECK SOLENOID POWER SUPPLY
1.
2.
3.

Connector

Terminal

E41

3

—

Voltage

Ground

Battery voltage

YES >> GO TO 2.
NO

2.CHECK SOLENOID GROUND
Connector
E41

Terminal
1
4

—

Continuity

Ground

Existed

NO


BRC-44

2009 370Z

C1120, C1122, C1124, C1126 IN ABS SOL
[VDC/TCS/ABS]



INFOID:0000000004535409

A


B

C

>> END

D

E

BRC

G

H

I

J

K

L

M

N

O

P


BRC-45

2009 370Z

C1121, C1123, C1125, C1127 OUT ABS SOL
[VDC/TCS/ABS]


C1121, C1123, C1125, C1127 OUT ABS SOL
Description

INFOID:0000000004497297

The solenoid valve increases, holds or decreases the fluid pressure of each brake caliper according to the signals transmitted by the ABS actuator and electric unit (control unit).

DTC Logic

INFOID:0000000004497298

DTC DETECTION LOGIC
DTC

Display item


C1121

FR LH OUT ABS SOL

LH outlet solenoid circuit.

C1123

FR RH OUT ABS SOL

RH outlet solenoid circuit.

C1125

RR LH OUT ABS SOL

LH outlet solenoid circuit.

C1127

RR RH OUT ABS SOL

Possible cause

RH outlet solenoid circuit.

(control unit)


Is DTC “C1121”, “C1123”, “C1125 ” or “C1127” detected?
NO
>> INSPECTION END

Diagnosis Procedure

INFOID:0000000004535488

1.CHECK SOLENOID POWER SUPPLY
1.
2.
3.

Connector

Terminal

E41

3

—

Voltage

Ground

Battery voltage

YES >> GO TO 2.
NO

2.CHECK SOLENOID GROUND
Connector
E41

Terminal
1
4

—

Continuity

Ground

Existed

NO

BRC-46

2009 370Z

C1121, C1123, C1125, C1127 OUT ABS SOL
[VDC/TCS/ABS]



INFOID:0000000004512100

A


B

C

>> END

D

E

BRC

G

H

I

J

K

L

M

N

O

P


BRC-47

2009 370Z

C1130 ENGINE SIGNAL
[VDC/TCS/ABS]


C1130 ENGINE SIGNAL
Description

INFOID:0000000004497302

ABS actuator and electric unit (control unit) and ECM exchange the engine signal with CAN communication
line.

DTC Logic

INFOID:0000000004497303

DTC DETECTION LOGIC
DTC

C1130

Display item

ENGINE SIGNAL 1


Major engine components are malfunctioning.

Possible cause
(control unit)
• ECM
• CAN communication line


NO
>> INSPECTION END

Diagnosis Procedure

INFOID:0000000004497304

1.PERFORM ECM SELF-DIAGNOSIS
Perform ECM self-diagnosis.
Is any DTC detected?
YES >> Check the DTC.
NO
>> GO TO 2.

2.PERFORM ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS
1. Erase ABS actuator and electric unit (control unit) self-diagnosis results.
3. Start the engine. Drive the vehicle for a while.
4. Make sure that malfunction indicator lamp (MIL) turns OFF.
5. Stop the engine. Perform ABS actuator and electric unit (control unit) self-diagnosis.
NO
>> Check ABS actuator and electric unit (control unit) harness connector terminals for damage or
loose connection with harness connector. If any items and damaged, repair or replace errordetected parts.


INFOID:0000000004512800

>> END


BRC-48

2009 370Z

C1142 PRESS SENSOR
[VDC/TCS/ABS]


C1142 PRESS SENSOR

A

Description

INFOID:0000000004497310

The pressure sensor converts the brake fluid pressure to an electric signal and transmits it to the ABS actuator
and electric unit (control unit). [The pressure sensor is integrated in the ABS actuator and electric unit (control
unit).]

B

DTC Logic

C

INFOID:0000000004497311

DTC DETECTION LOGIC
D
DTC

C1142

Display item

PRESS SEN CIRCUIT


Possible cause

Pressure sensor signal line is open or shorted, or pressure sensor is malfunctioning.

• Stop lamp switch
(control unit)


E

BRC

NO
>> INSPECTION END

Diagnosis Procedure

G

H
INFOID:0000000004497312

I

Check stop lamp switch. Refer to BRC-43, "Component Inspection".
YES >> GO TO 2.
NO

J

K

2.CHECK BRAKE SYSTEM
1.
2.
3.
4.
5.
6.

Check brake fluid leakage: refer to BR-10, "Inspection".
Check brake piping: refer to BR-24, "FRONT : Inspection" (front), BR-28, "REAR : Inspection" (rear).
Check brake pedal: refer to BR-7, "Inspection and Adjustment".
Check master cylinder: refer to BR-12, "Inspection".
Check brake booster: refer to BR-13, "Inspection".
Check front disc brake: refer to BR-44, "BRAKE CALIPER ASSEMBLY (2 PISTON TYPE) : Inspection" (2
piston type), BR-48, "BRAKE CALIPER ASSEMBLY (4 PISTON TYPE) : Inspection" (4 piston type).
7. Check rear disc brake: refer to BR-58, "BRAKE CALIPER ASSEMBLY (1 PISTON TYPE) : Inspection" (1
piston type), BR-62, "BRAKE CALIPER ASSEMBLY (2 PISTON TYPE) : Inspection" (2 piston type).
YES >> GO TO 3.
NO

3.PERFORM SELF-DIAGNOSIS
Perform ABS actuator and electric unit (control unit) self-diagnosis.
NO
>> Check ABS actuator and electric unit (control unit) harness connector terminals for damage or
loose connection with harness connector. If any items are damaged, repair or replace errordetected parts.


BRC-49

2009 370Z

L

M

N

O

P

C1142 PRESS SENSOR
[VDC/TCS/ABS]



INFOID:0000000004512802

>> END


BRC-50

2009 370Z

C1143 STEERING ANGLE SENSOR
[VDC/TCS/ABS]



A

Description

INFOID:0000000004497315

The steering angle sensor detects the rotation amount, angular velocity and direction of the steering wheel,
and transmits the data to the ABS actuator and electric unit (control unit) via CAN communication.

DTC Logic

B

INFOID:0000000004497316

C

DTC DETECTION LOGIC
DTC

C1143

Display item


ST ANG SEN CIRCUIT

Steering angle sensor is malfunctioning.

Possible cause
• Steering angle sensor
(control unit)

D

E



BRC

NO
>> INSPECTION END

Diagnosis Procedure

G

H
INFOID:0000000004497317

1.CHECK STEERING ANGLE SENSOR POWER SUPPLY

I

1.
2.
3.

J

Disconnect steering angle sensor harness connector.
Check the voltage between steering angle sensor harness connector and ground.
Connector
M37

4.
5.

Terminal
8

—

Condition

Voltage

Ground


Approx. 0 V

K

CAUTION:
Check the voltage between steering angle sensor harness connector and ground.
Connector

Terminal

M37

8

—

Condition
Ignition switch: ON

M

Voltage

Ground

L

Battery voltage

N

YES >> GO TO 3.
NO
>> GO TO 2.

O

2.CHECK STEERING ANGLE SENSOR CIRCUIT
1.
2.
3.

Check continuity between steering angle sensor harness connector and IPDM E/R harness connector.


BRC-51

2009 370Z

P

[VDC/TCS/ABS]


IPDM E/R

Connector

Terminal

Connector

Terminal

M37

8

E5

25

Continuity
Existed

YES >> Perform the trouble diagnosis for ignition power supply circuit. Refer to PG-42, "Wiring Diagram IGNITION POWER SUPPLY -"
NO

3.CHECK STEERING ANGLE SENSOR GROUND
Check continuity between steering angle sensor harness connector and ground.
Connector

Terminal

M37

7

—

Continuity

Ground

Existed

YES >> GO TO 4.
NO

4.CHECK DATA LINE
Check “STRG BRANCH LINE CIRCUIT”. Refer to LAN-53, "Diagnosis Procedure".
NO
>> Repair or replace error-detected parts. Refer to BRC-90, "Precautions for Harness Repair".


INFOID:0000000004513176

>> END


BRC-52

2009 370Z

C1144 INCOMPLETE STEERING ANGLE SENSOR ADJUSTMENT
[VDC/TCS/ABS]


C1144 INCOMPLETE STEERING ANGLE SENSOR ADJUSTMENT
DTC Logic

A

INFOID:0000000004512950

DTC DETECTION LOGIC
DTC

C1144

B

Display item

ST ANG SEN SIGNAL


Possible cause

Neutral position of steering angle sensor is not finished.

• Steering angle sensor
(control unit)

C

D



E
Select “ST ANG SEN ADJUSTMENT” in “WORK SUPPORT”, and perform adjust the neutral position of
steering angle sensor.
BRC
G
NO
>> INSPECTION END

1.
2.

Diagnosis Procedure

INFOID:0000000004512951

H

1.CHECK STEERING ANGLE SENSOR
Check steering angle sensor. Refer to BRC-51, "Diagnosis Procedure".
YES >> Replace ABS actuator and electric unit (control unit).
NO

I

J


INFOID:0000000004513174


K


L

>> END
M

N

O

P


BRC-53

2009 370Z

C1145, C1146 YAW RATE/SIDE G SENSOR
[VDC/TCS/ABS]


Description

INFOID:0000000004497320

The yaw rate/side G sensor detects the yaw rate/side G affecting the vehicle, and transmits the data to the
ABS actuator and electric unit (control unit) as an analog voltage signal.

DTC Logic

INFOID:0000000004497321

DTC DETECTION LOGIC
DTC

Display item


Possible cause
(control unit)
• Yaw rate/side G sensor

C1145

YAW RATE SENSOR

Yaw rate sensor is malfunctioning, or the yaw rate sensor
signal line is open or shorted.

C1146

SIDE G-SEN CIRCUIT

Side G sensor is malfunctioning, or circuit of side G sensor is open or shorted.


Is DTC “C1145” or “C1146” detected?
NO
>> INSPECTION END

Diagnosis Procedure

INFOID:0000000004497322

CAUTION:
• Sudden turns (such as spin turns, acceleration turns), drifting, etc., when VDC function is off (VDC
OFF switch “ON”) may cause yaw rate/side G sensor system to indicate a malfunction. However, this
is not a malfunction, if normal operation can be resumed after restarting engine. Then erase memory
of self-diagnosis.
• If vehicle is on turn-table at entrance to parking garage, or on other moving surface, VDC OFF indicator lamp may illuminate and CONSULT-III self-diagnosis may indicate yaw rate sensor system malfunction. However, in this case there is no malfunction in yaw rate sensor system. Take vehicle off of
turn-table or other moving surface, and start the engine. Results will return to normal.

INSPECTION PROCEDURE

1.CHECK YAW RATE/SIDE G SENSOR POWER SUPPLY
1.
2.
3.

Disconnect yaw rate/side G sensor harness connector.
Check voltage between yaw rate/side G sensor harness connector and ground.
Connector
M143

4.
5.

Terminal
4

—

Condition

Voltage

Ground


Approx. 0 V

CAUTION:
Check voltage between yaw rate/side G sensor harness connector and ground.
Connector

Terminal

M143

4

—

Condition

Voltage

Ground

Ignition switch: ON

Battery voltage

YES >> GO TO 3.

BRC-54

2009 370Z

[VDC/TCS/ABS]

NO
>> GO TO 2.

2.CHECK YAW RATE/SIDE G SENSOR CIRCUIT
1.
2.
3.

A

Check continuity between yaw rate/side G sensor harness connector and IPDM E/R harness connector.

IPDM E/R

Connector

Terminal

Connector

Terminal

M143

4

E5

25

Continuity

B

C

Existed

YES >> Perform the trouble diagnosis for ignition power supply circuit. Refer to PG-42, "Wiring Diagram IGNITION POWER SUPPLY -".
NO

3.CHECK YAW RATE/SIDE G SENSOR GROUND

D

E

Check continuity between yaw rate/side G sensor harness connector and ground.
BRC

1

Continuity
Existed

Terminal

M143

—
Ground

Connector

G

YES >> GO TO 4.
NO

H

4.CHECK YAW RATE/SIDE G SENSOR CIRCUIT
Check continuity between yaw rate/side G sensor harness connector and ABS actuator electric unit (control
unit) harness connector.
Connector
M143

ABS actuator electric unit (control unit)

Terminal

Connector

2

Terminal

E41

3

25
45

J
Continuity

Existed

YES >> GO TO 5.
NO
1.
2.
3.
4.

Replace yaw rate/side G sensor. Refer to BRC-97, "Exploded View".
CAUTION:
Is DTC “C1145” or “C1146” detected?
NO
>> INSPECTION END
INFOID:0000000004512803


BRC-55

K

L

5.REPLACE YAW RATE/SIDE G SENSOR


I

2009 370Z

M

N

O

P

[VDC/TCS/ABS]

>> END


BRC-56

2009 370Z

C1147, C1148, C1149, C1150 USV/HSV LINE
[VDC/TCS/ABS]


C1147, C1148, C1149, C1150 USV/HSV LINE

A

Description

INFOID:0000000004497325

USV1, USV2 (CUT VALVE)

B

The cut valve shuts off the normal brake fluid path from the master cylinder, when VDC/TCS is activated.

HSV1, HSV2 (SUCTION VALVE)
The suction valve supplies the brake fluid from the master cylinder to the pump, when VDC/TCS is activated.

DTC Logic

C

INFOID:0000000004497326

D

DTC DETECTION LOGIC
DTC

Display item


USV LINE [FL-RR]

VDC switch-over solenoid valve (USV1) on the primary
side is open circuit or shorted, or the control line is open
or shorted to the power supply or the ground.

USV LINE [FR-RL]

VDC switch-over solenoid valve (USV2) on the primary

C1149

HSV LINE [FL-RR]

VDC switch-over solenoid valve (HSV1) on the primary

C1150

HSV LINE [FR-RL]

Possible cause

VDC switch-over solenoid valve (HSV2) on the primary

C1147

C1148

E

BRC
(control unit)

G

H

I


NO
>> INSPECTION END

Diagnosis Procedure

J

K
INFOID:0000000004516999

L

1.CHECK ACTUATOR RELAY POWER SUPPLY
1.
2.
3.

Connector

Terminal

E41

3

N
—

Voltage

Ground

Battery voltage

O

YES >> GO TO 2.
NO

P

2.CHECK ACTUATOR RELAY GROUND


M

BRC-57

2009 370Z

C1147, C1148, C1149, C1150 USV/HSV LINE
[VDC/TCS/ABS]

Connector
E41

Terminal
1
4

—

Continuity

Ground

Existed

NO


INFOID:0000000004512805

>> END


BRC-58

2009 370Z

C1155 BRAKE FLUID LEVEL SWITCH
[VDC/TCS/ABS]



A

Description

INFOID:0000000004497330

The brake fluid level switch converts the brake fluid level to an electric signal and transmits it to the ABS actuator and electric unit (control unit).

DTC Logic

B

INFOID:0000000004497331

C

DTC DETECTION LOGIC
DTC

Display item

C1155

Brake fluid level is low or communication line between
the ABS actuator and electric unit (control unit) and brake
fluid level switch is open or shorted.

BR FLUID LEVEL LOW

Possible cause
• Brake fluid level switch
• Combination meter

D

E



BRC

NO
>> INSPECTION END

Diagnosis Procedure

G

INFOID:0000000004497332

H

1.PERFORM COMBINATION METER SELF-DIAGNOSIS
Perform combination meter self-diagnosis. Refer to MWI-33, "CONSULT-III Function (METER/M&A)".
Is any DTC detected?
YES >> Check the DTC.
NO
>> GO TO 2.

I

J

2.CHECK THE BRAKE FLUID LEVEL
K

Check the brake fluid level. Refer to BR-10, "Inspection".
YES >> GO TO 3.
NO
>> Refill the brake fluid. Refer to BR-10, "Refilling".

L

3.CHECK BRAKE FLUID LEVEL SWITCH CIRCUIT
Check continuity between brake fluid level switch harness connector and combination meter harness connector.
Combination meter

Brake fluid level switch

Connector

Terminal

Connector

Terminal

M53

27

E47

1

M

N

Continuity
Existed

O
Connector

Terminal

E47

1

Connector

Terminal

E47

2


—

Continuity

Ground

Not existed

—

Continuity

Ground

Existed

P

BRC-59

2009 370Z

[VDC/TCS/ABS]

YES >> GO TO 4.
NO

4.CHECK BRAKE FLUID LEVEL SWITCH
Check brake fluid level switch. Refer to BRC-60, "Component Inspection".
YES >> Check combination meter. Refer to MWI-32, "Diagnosis Description".
NO
>> Replace reservoir tank. Refer to BR-29, "Exploded View".

Component Inspection

INFOID:0000000004497333

1.CHECK BRAKE FLUID LEVEL SWITCH
1.
2.
3.

Disconnect brake fluid level switch harness connector.
Check continuity between brake fluid level switch harness connector.

Condition

Terminal
1−2

Continuity

When brake fluid is full in the reservoir tank.
When brake fluid is empty in the reservoir tank.

Not existed
Existed

NO
>> Replace reservoir tank. Refer to BR-29, "Exploded View".


INFOID:0000000004512806

>> END


BRC-60

2009 370Z

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