Infiniti FX35 / FX45. Manual - part 265

BRC-46

< SERVICE INFORMATION >

[VDC/TCS/ABS]

TROUBLE DIAGNOSIS FOR SYSTEM

Does anything besides “ST ANG SEN SIGNAL” appear on self-diagnostic results display?

YES

>> Inspect and repair the indicated items. Then perform self-diagnosis again.

NO

>> Perform adjustment of steering angle sensor neutral position. Then GO TO 2.

2.

CHECK SELF DIAGNOSIS RESULTS (2)

Turn ignition switch OFF and ON to erase self-diagnostic results, and perform ABS actuator and electric unit
(control unit) self-diagnosis again.

Does anything appear on self-diagnostic results display?

YES

>> Replace steering angle sensor. Then perform adjustment of neutral position and perform self-

diagnosis again.

NO

>> INSPECTION END

DTC C1145 YAW RATE SENSOR

INFOID:0000000001569717

Refer to 

BRC-38, "DTC C1113 G-SENSOR"

.

DTC C1146 SIDE G-SEN CIRCUIT

INFOID:0000000001569718

Refer to 

BRC-38, "DTC C1113 G-SENSOR"

.

DTC C1155 BR FLUID LEVEL LOW

INFOID:0000000001327687

INSPECTION PROCEDURE

1.

CHECK SELF-DIAGNOSTIC RESULTS

1.

Check fluid level in brake fluid reservoir tank. If the level is low, add brake fluid.

2.

Clear the stored self-diagnostic results and check self-diagnostic results.

Is the above displayed in the self-diagnosis display item?

YES

>> GO TO 2.

NO

>> INSPECTION END

2.

CHECK CONNECTOR

1.

Disconnect brake fluid level switch connector and ABS actuator and electric unit (control unit) connector
and check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found,
repair or replace terminal.

2.

Securely reconnect connectors and perform self-diagnosis again.

OK or NG

OK

>> Connector terminal contact is loose, damaged, open or shorted.

NG

>> GO TO 3.

3.

CHECK HARNESS BETWEEN BRAKE FLUID LEVEL SWITCH AND ABS ACTUATOR AND ELECTRIC

UNIT (CONTROL UNIT)

Self-diagnostic results

ST ANG SEN SIGNAL

Self-diagnostic results

BR FLUID LEVEL LOW

TROUBLE DIAGNOSIS FOR SYSTEM

BRC-47

< SERVICE INFORMATION >

[VDC/TCS/ABS]

C

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BRC

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1.

Turn ignition switch OFF and disconnect brake fluid level switch
connector E52 and ABS actuator and electric unit (control unit)
connector E56.

2.

Check continuity between brake fluid level switch harness con-
nector and ABS actuator and electric unit (control unit) harness
connector.

OK or NG

OK

>> Connect connectors and perform an ABS actuator and electric unit (control unit) self-diagnosis.

NG

>> If open or short in harness, repair or replace applied harness.

DTC C1156 ST ANG SEN COM CIR

INFOID:0000000001569719

Refer to 

BRC-48, "DTC U1000 CAN COMM CIRCUIT"

.

DTC C1160 DECEL G SEN SET

INFOID:0000000001327689

INSPECTION PROCEDURE

1.

CHECK SELF- DIAGNOSTIC RESULTS (1)

Check self-diagnostic results.

Does anything besides “DECEL G SEN SET” appear on self-diagnostic results display?

YES

>> Inspect and repair the indicated items. Then perform self-diagnosis again.

NO

>> Perform calibration of decel G sensor. Then GO TO 2.

2.

CHECK SELF-DIAGNOSIS RESULTS (2)

Turn ignition switch OFF and ON to erase self-diagnostic results, and perform ABS actuator and electric unit
(control unit) self-diagnosis again.

Does anything appear on self-diagnostic results display?

YES

>> Replace yaw rate/side/decel G sensor. Then perform calibration of decel G sensor and perform

self-diagnosis again.

NO

>> INSPECTION END

DTC C1164 CV 1

INFOID:0000000001569724

Refer to 

BRC-40, "DTC C1120 FR LH IN ABS SOL"

.

DTC C1165 CV 2

INFOID:0000000001569725

Refer to 

BRC-40, "DTC C1120 FR LH IN ABS SOL"

.

DTC C1166 SV 1

INFOID:0000000001569726

Refer to 

BRC-40, "DTC C1120 FR LH IN ABS SOL"

.

DTC C1167 SV 2

INFOID:0000000001569727

Refer to 

BRC-40, "DTC C1120 FR LH IN ABS SOL"

.

ABS actuator and electric unit 

(control unit)

Brake fluid level switch

Continuity

8

1

Yes

8

Ground

No

Ground

2

Yes

SFIA1193E

Self-diagnostic results

DECEL G SEN SET

BRC-48

< SERVICE INFORMATION >

[VDC/TCS/ABS]

TROUBLE DIAGNOSIS FOR SYSTEM

DTC C1170 VARIANT CODING

INFOID:0000000001569755

Refer to 

BRC-37, "DTC C1110 CONTROLLER FAILURE"

.

DTC U1000 CAN COMM CIRCUIT

INFOID:0000000001327690

INSPECTION PROCEDURE

1.

CHECK CONNECTOR

1.

Turn ignition switch OFF, disconnect the ABS actuator and electric unit (control unit) connector, and check
the terminal for deformation, disconnection, looseness, and so on. If there is a malfunction, repair or
replace the terminal.

2.

Reconnect connector to perform self-diagnosis.

Is “CAN COMM CIRCUIT” or “ST ANG SEN COM CIR” displayed in the self-diagnosis display items?

YES

>> Print out the self-diagnostic results, and refer to 

LAN-43, "CAN System Specification Chart"

.

NO

>> Connector terminal connection is loose, damaged, open, or shorted.

Component Inspection

INFOID:0000000001327691

VDC OFF SWITCH

• Turn ignition switch OFF and disconnect VDC OFF switch connec-

tor, and check continuity between VDC OFF switch connector M32
terminals 1 and 2.

1 -2

: Continuity should exist when pushing 
switch.
Continuity should not exist when releasing 
switch.

SFIA1203E

TROUBLE DIAGNOSIS FOR SYMPTOMS

BRC-49

< SERVICE INFORMATION >

[VDC/TCS/ABS]

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TROUBLE DIAGNOSIS FOR SYMPTOMS

Excessive ABS Function Operation Frequency

INFOID:0000000001327692

1.

CHECK FRONT AND REAR AXLE 

Make sure there is no excessive looseness in the front and rear axles.
OK or NG

OK

>> GO TO 2.

NG

>> Check front or rear axle system.

2.

CHECK WHEEL SENSOR 

Perform following inspection for wheel sensor:
• Sensor mount and damage inspection
• Sensor rotor mount and damage inspection
• Sensor connector connection inspection
• Sensor harness inspection

OK or NG

OK

>> GO TO 3.

NG

>> Replace sensor or sensor rotor.

3.

CHECK ABS WARNING LAMP DISPLAY 

Make sure warning lamp turns off approximately 2 seconds after the ignition switch is turned ON or when driv-
ing.

OK or NG

OK

>> Normal

NG

>> Perform self-diagnosis. Refer to 

BRC-26, "Self-Diagnosis"

.

Unexpected Pedal Reaction

INFOID:0000000001327693

1.

CHECK BRAKE PEDAL STROKE

Check brake pedal stroke.
Is the stroke too long?

YES

>> • Bleed air from brake piping.

• Check brake pedal, brake booster, and master cylinder mount for play, looseness, and brake

system for fluid leaks, etc. If any malfunctions are found, make repair.

NO

>> GO TO 2.

2.

CHECK FUNCTION

Disconnect ABS actuator and electric unit (control unit) connector E56 and make sure that braking force is suf-
ficient when ABS in not operating. After the inspection, reconnect connector. 

OK or NG

OK

>> CHECK WHEEL SENSOR. Refer to 

BRC-49, "Excessive ABS Function Operation Frequency"

.

NG

>> Check brake system.

The Braking Distance Is Long

INFOID:0000000001327694

CAUTION:

On slippery road surfaces, the stopping distance might be longer with the ABS operating than when
the ABS is not operating.

1.

CHECK FUNCTION

Disconnect ABS actuator and electric unit (control unit) connector E56 to deactivate ABS. In this condition,
check stopping distance. After inspection, connect connector.
OK or NG

OK

>> • Bleed air from brake piping.

• Check brake system.

NG

>> CHECK WHEEL SENSOR. Refer to 

BRC-49, "Excessive ABS Function Operation Frequency"

.