Infiniti G35 (V35). Manual - part 244

TROUBLE DIAGNOSIS FOR SYSTEM

BRC-37

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

Engine System

NFS00072

INSPECTION PROCEDURE

1. 

CHECK SELF-DIAGNOSTIC RESULTS

Check the self-diagnostic results.

Is above displayed on self-diagnosis display?

YES

>> GO TO 2.

NO

>> INSPECTION END

2. 

CHECK ENGINE SYSTEM

1.

Perform ECM self-diagnosis. Repair or replace items indicated, then perform ECM self-diagnosis again.

2.

Perform VDC/TCS/ABS control unit self-diagnosis again.

OK or NG

OK

>> INSPECTION END

NG

>> Repair or replace the items indicated. Then perform self-diagnosis again.

VDC/TCS/ABS Control Unit 1

NFS00073

INSPECTION PROCEDURE

1. 

CHECK SELF-DIAGNOSTIC RESULTS

Check the self-diagnostic results.

Is above displayed on self-diagnosis display?

YES

>> Repair or replace the items indicated. Then perform self-diagnosis again.

NO

>> Replace VDC/TCS/ABS control unit. Then perform VDC/TCS/ABS control unit self-diagnosis

again.

Self-diagnostic results

ENGINE SIGNAL 1

ENGINE SIGNAL 2

ENGINE SIGNAL 3

ENGINE SIGNAL 4

ENGINE SIGNAL 5

ENGINE SIGNAL 6

Self-diagnostic results

CONTROLLER FAILURE

BRC-38

[VDC/TCS/ABS]

TROUBLE DIAGNOSIS FOR SYSTEM

Pressure Sensor System

NFS00074

INSPECTION PROCEDURE

1. 

CHECK SELF-DIAGNOSTIC RESULTS

Check the self-diagnostic results.

Is above displayed on self-diagnosis display?

YES

>> GO TO 2.

NO

>> INSPECTION END

2. 

CHECK STOP LAMP SWITCH CONNECTOR

1.

Turn ignition switch OFF and disconnect stop lamp switch connector and VDC/TCS/ABS control unit con-
nector.

2.

Reconnect connectors securely.

3.

Start engine.

4.

Repeat pumping brake pedal carefully several times, then perform self-diagnosis.

Do any self-diagnostic items appear?

YES

>> GO TO 3.

NO

>> Poor connection. Repair or replace connector.

3. 

CHECK STOP LAMP SWITCH

1.

Turn ignition switch OFF and disconnect stop lamp switch har-
ness connector.

2.

Operate stop lamp switch and check continuity between stop
lamp switch harness connector terminals.

OK or NG

OK

>> GO TO 4.

NG

>> Replace stop lamp switch. Refer to 

BR-7, "Components"

 .

Self-diagnostic results

PRESS SEN CIRCUIT

Terminal

Condition

Continuity

3 

−

 4

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

Yes

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

No

SFIA3390E

TROUBLE DIAGNOSIS FOR SYSTEM

BRC-39

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

4. 

CHECK STOP LAMP SWITCH CIRCUIT

1.

Turn ignition switch OFF and disconnect VDC/TCS/ABS control
unit harness connector.

2.

Check continuity between VDC/TCS/ABS control unit harness
connector M93 terminal 48 and ground.

OK or NG

OK

>> GO TO 5.

NG

>> Open or short in harness between VDC/TCS/ABS control unit and stop lamp switch

5. 

CHECK PRESSURE SENSOR CONNECTOR

1.

Turn ignition switch OFF and disconnect VDC actuator (pressure sensor) connector and VDC/TCS/ABS
control unit connector. Then reconnect them securely.

2.

Perform VDC/TCS/ABS control unit self-diagnosis again.

OK or NG

OK

>> Poor connection of connectors. Repair or replace suspect connector. Perform self-diagnosis

again.

NO

>> GO TO 6.

6. 

CHECK PRESSURE SENSOR CIRCUIT

1.

Turn ignition switch OFF and disconnect VDC actuator (pres-
sure sensor) connector and VDC/TCS/ABS control unit connec-
tor.

2.

Check continuity between VDC/TCS/ABS control unit harness
connector M93 and VDC actuator (pressure sensor) harness
connector E50.

OK or NG

OK

>> GO TO 7.

NG

>> Open or short in harness. Repair or replace the suspect harness.

SFIA2450E

VDC/TCS/ABS control unit

Ground

Measurement condition

Voltage

48

—

Brake pedal depressed

Battery voltage (Approx. 12 V)

Brake pedal not depressed

Approx. 0 V

VDC/TCS/ABS control unit

Pressure sensor

Continuity

69

30

Yes

68

31

67

32

SFIA1367E

BRC-40

[VDC/TCS/ABS]

TROUBLE DIAGNOSIS FOR SYSTEM

7. 

CHECK PRESSURE SENSOR

1.

Connect VDC actuator (pressure sensor) connector and VDC/TCS/ABS control unit connector.

2.

Check  “DATA MONITOR” for “PRESS SENSOR”. Check if results are normal.

OK or NG

OK

>> Perform VDC/TCS/ABS control unit self-diagnosis again.

NG

>> Pressure sensor malfunction. Replace VDC actuator (inside pressure sensor).

Steering Angle Sensor System

NFS00075

INSPECTION PROCEDURE

1. 

CHECK SELF-DIAGNOSTIC RESULTS 

Check the self-diagnostic results.

Is above displayed on self-diagnosis display?

YES

>> GO TO 2.

NO

>> INSPECTION END

2. 

CHECK CONNECTOR

1.

Turn ignition switch OFF and disconnect steering angle sensor connector and VDC/TCS/ABS control unit
connector. Then reconnect them securely.

2.

Perform VDC/TCS/ABS control unit self-diagnosis again.

OK or NG

OK

>> Poor connection of connectors. Repair or replace suspect connector. Perform self-diagnosis

again.

NO

>> GO TO 3.

3. 

CHECK STEERING ANGLE SENSOR CIRCUIT

1.

Turn ignition switch OFF and disconnect VDC/TCS/ABS control
unit connector and steering angle sensor connector.

2.

Check continuity between VDC/TCS/ABS control unit harness
connector M93 and steering angle sensor harness connector
M22.

OK or NG

OK

>> GO TO 4.

NG

>> Open or short in harness. Repair or replace the suspect

harness.

Condition

Data monitor display

Brake pedal depressed

−

 40 to 300 bar

When brake pedal is released.

Approx. 0 bar

Self-diagnostic results

ST ANGLE SEN CIRCUIT

VDC/TCS/ABS control unit

Steering angle sensor

Continuity

2

3

Yes

SFIA1368E