Infiniti G35 (V35). Manual - part 246

TROUBLE DIAGNOSIS FOR SYSTEM

BRC-45

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

3. 

CHECK ABS MOTOR AND MOTOR RELAY POWER SYSTEM

1.

Turn ignition switch OFF and disconnect VDC relay box connec-
tor.

2.

Check voltage between VDC relay box harness connector E48
and ground.

OK or NG

OK

>> GO TO 4.

NG

>>

●

Check fuse 50A.

●

Make sure there is continuity between battery positive terminal and VDC relay box harness
connector E48 terminal No. 10.

4. 

CHECK ABS MOTOR AND MOTOR RELAY CIRCUIT

1.

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

2.

Check for continuity between VDC/TCS/ABS control unit har-
ness connector M93 and VDC relay box harness connector E47.

OK or NG

OK

>> GO TO 5.

NG

>> Open or short in harness between VDC/TCS/

ABS control unit and VDC relay box

5. 

CHECK ACTUATOR MOTOR

Check if actuator motor operates after energizing approximately 12
V to the connector terminal 15 at the VDC relay box harness connec-
tor E222.

CAUTION:

To prevent overheating, do not drive actuator motor more than
4 seconds.

OK or NG

OK

>> GO TO 6.

NG

>> Actuator motor or actuator motor circuit open or short in

harness. Replace VDC actuator. 

6. 

CHECK MOTOR RELAY UNIT

Check motor relay as a unit. Refer to 

BRC-52, "ABS MOTOR RELAY AND ACTUATOR RELAY"

 .

OK or NG

OK

>> Replace VDC actuator.

NG

>> Replace VDC relay box (motor relay).

VDC relay box

Ground

Voltage

10

—

Battery voltage

(Approx. 12 V)

SFIA1372E

VDC/TCS/ABS control unit

VDC relay box

Continuity

20

4

Yes

7

8

SFIA2448E

SFIA2368E

BRC-46

[VDC/TCS/ABS]

TROUBLE DIAGNOSIS FOR SYSTEM

Actuator Relay System

NFS00079

INSPECTION PROCEDURE

1. 

CHECK SELF-DIAGNOSTIC RESULTS

Check the self-diagnostic results.

Is above displayed in the self-diagnosis item?

YES

>> GO TO 2.

NO

>> INSPECTION END

2. 

CHECK CONNECTOR

1.

Turn ignition switch OFF and disconnect VDC/TCS/ABS control unit connector and VDC relay box con-
nectors. Then reconnect it securely.

2.

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

Do any self-diagnosis items appear?

YES

>> GO TO 3.

NO

>> Poor connection. Repair or replace connector.

3. 

CHECK VDC/TCS/ABS CONTROL UNIT GROUND CIRCUIT

1.

Turn ignition switch OFF and disconnect VDC/TCS/ABS control
unit connector M93.

2.

Check VDC/TCS/ABS control unit ground circuit.

OK or NG

OK

>> GO TO 4.

NG

>>

●

Poor connection of VDC/TCS/ABS control unit, or
harness malfunction.

4. 

CHECK ACTUATOR RELAY POWER SUPPLY CIRCUIT

1.

Disconnect VDC relay box connector. 

2.

Check voltage between VDC relay box harness connector E48
and ground.

OK or NG

OK

>> GO TO 5.

NG

>>

●

Check fuse 30 A.

●

Check continuity between battery positive terminal
and VDC relay box harness connector E48 terminal No. 9. If it is not OK, replace fuse or har-
ness.

Self-diagnostic results

MAIN RELAY

VDC/TCS/ABS control unit

Ground

Continuity

28, 29

—

Yes

SFIA1374E

VDC relay box

Ground

Voltage

9

—

Battery voltage

(Approx. 12 V)

SFIA1375E

TROUBLE DIAGNOSIS FOR SYSTEM

BRC-47

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

5. 

CHECK ACTUATOR RELAY POWER SUPPLY CIRCUIT

1.

Disconnect VDC/TCS/ABS control unit connector and VDC
relay box connector and steering angle sensor connector.

2.

Check continuity between VDC/TCS/ABS control unit harness
connector M93 and VDC relay box harness connector E47.

OK or NG

OK

>> GO TO 6.

NG

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

6. 

CHECK SOLENOID VALVE RELAY UNIT

Check solenoid valve relay as a unit. Refer to 

BRC-52, "ABS MOTOR RELAY AND ACTUATOR RELAY"

 .

OK or NG

OK

>> Replace VDC actuator.

NG

>> Replace solenoid valve relay.

Stop Lamp Switch System

NFS0007A

INSPECTION PROCEDURE

1. 

CHECK SELF-DIAGNOSTIC RESULTS 

Check the self-diagnostic results.

Is above displayed in the self-diagnosis item?

YES

>> GO TO 2.

NO

>> INSPECTION END

2. 

CHECK 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.

VDC/TCS/ABS control unit

VDC relay box

Continuity

2

5

Yes

36

7

SFIA1376E

Self-diagnostic results

STOP LAMP SW

BRC-48

[VDC/TCS/ABS]

TROUBLE DIAGNOSIS FOR SYSTEM

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"

 .

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

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

NG

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

VDC/TCS/ABS Control Unit Power and Ground System

NFS0007B

INSPECTION PROCEDURE

1. 

CHECK SELF-DIAGNOSTIC RESULTS 

Check the self-diagnostic results.

Is above displayed in the self-diagnosis item?

YES

>> GO TO 2.

NO

>> INSPECTION END

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

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

Self-diagnostic results

BATTERY VOLTAGE [ABNORMAL]