Infiniti G35 (V35). Manual - part 243

TROUBLE DIAGNOSIS

BRC-33

[VDC/TCS/ABS]

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BRC

Basic Inspection

NFS00070

BRAKE FLUID LEVEL AND LEAK INSPECTION

1.

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

2.

Check for leakage in brake piping and around VDC actuator. If leakage or is found, check as follows.

●

If the connections at VDC actuator connector are loose, tighten piping to specified torque. Then inspect
again and confirm that there is no leakage.

●

 If flare nuts or screws of VDC actuator are damaged and loose, replace damaged parts. Then inspect
again and confirm that there is no leakage.

●

If there is leakage at any location other than VDC actuator connections, wipe away leakage with clean
cloth. Then inspect again and confirm that there is no leakage.

●

If there is leakage from VDC actuator, wipe away leakage with clean cloth. Then inspect again. If there
is leakage, replace VDC actuator.

CAUTION:

VDC actuator body cannot be disassembled.

3.

Check brake disc rotor and pads. Refer to 

BR-21, "PAD WEAR INSPECTION"

  (front disc brake), 

BR-27,

"PAD WEAR INSPECTION"

  (rear disc brake).

INSPECTION FOR LOOSENESS OF POWER SYSTEM TERMINALS

Check battery for looseness on battery positive/negative terminals and ground connection. If looseness is
detected, fasten the connections to the specified torque. Make sure battery voltage does not drop and alterna-
tor is normal.

INSPECTION OF ABS WARNING LAMP, VDC OFF INDICATOR LAMP, SLIP INDICATOR LAMP 
AND BRAKE WARNING LAMP

×

: ON

–: OFF

Note1:Brake warning lamp will turn on in case of parking brake operation (when switch is ON) or of brake fluid level switch operation
(when brake fluid is insufficient).
Note2:After starting engine, brake warning lamp is turned off.

1.

Make sure that ABS warning lamp illuminates when ignition switch is turned ON. If it does not illuminate,
inspect ABS warning lamp and circuit, and inspect combination meter. Refer to 

DI-4, "COMBINATION

METERS"

 .

2.

Make sure that VDC OFF indicator lamp illuminates when ignition switch is turned ON. If it does not illumi-
nate, inspect VDC OFF indicator lamp and circuit, and inspect combination meter. Refer to 

DI-4, "COMBI-

NATION METERS"

 . If VDC OFF indicator lamp does not illuminate, inspect VDC OFF switch and circuit

first time. Refer to 

BRC-52, "VDC OFF SWITCH"

 .

3.

Make sure that SLIP indicator lamp illuminates when ignition switch is turned ON. If it does not turn on,
check SLIP indicator lamp and circuit, and inspect combination meter. Refer to 

DI-4, "COMBINATION

METERS"

 .

4.

With engine running, turn VDC OFF switch ON and OFF. Check that VDC OFF indicator lamp turns ON
and OFF. If indicator lamp does not turn ON and OFF in accordance with switch over of VDC OFF switch,
inspect VDC OFF switch and circuit. Refer to 

BRC-52, "VDC OFF SWITCH"

 .

Condition

ABS warning lamp

VDC OFF

 indicator lamp

SLIP indicator lamp

Brake warning lamp 

[Note1]

Ignition switch OFF

–

–

–

–

For 1 second after turning ON igni-
tion switch

×

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×

×

 [Note 2]

1 second later after turning ON 
ignition switch

–

–

–

×

 [Note 2]

VDC OFF switch turned ON.
(VDC function is OFF.)

–

×

–

–

VDC/TCS/ABS error.

×

×

×

–

When VDC/TCS is not functioning 
normally.

–

×

×

–

EBD error.

×

×

×

–

BRC-34

[VDC/TCS/ABS]

TROUBLE DIAGNOSIS

5.

With VDC OFF switch OFF (not operating), make sure that VDC OFF indicator lamp turns off after
engine starts. If VDC OFF indicator lamp does not turn OFF after 10 seconds have passed since engine-
start, perform self-diagnosis of VDC/TCS/ABS control unit. Refer to 

BRC-25, "Self-Diagnosis"

 . Be sure to

erase memory after performing self-diagnosis. Refer to 

BRC-26, "ERASE MEMORY"

 .

TROUBLE DIAGNOSIS FOR SYSTEM

BRC-35

[VDC/TCS/ABS]

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BRC

TROUBLE DIAGNOSIS FOR SYSTEM

PFP:00000

Wheel Sensor System

NFS00071

First use CONSULT-II self-diagnostic results to determine positions of malfunctioning wheel sensors. Then
inspect parts and determine which parts to replace.

CAUTION:

●

Do not measure the resistance value and also voltage between sensor terminal with tester etc.,
because sensor is an active sensor.

●

Do not expand terminal of connector with a tester terminal stick, when it does the inspection with
tester.

INSPECTION PROCEDURE

1. 

CHECK SELF-DIAGNOSTIC RESULTS

Check the self-diagnostic results.

Is above displayed in the self-diagnosis display item?

YES

>> GO TO 2.

NO

>> INSPECTION END.

2. 

CHECK TIRE 

Check air pressure, wear and size.

Are air pressure, wear, and size within standards?

YES

>> GO TO 3.

NO

>> Adjust air pressure or replace tire.

3. 

CHECK CONNECTOR

Turn ignition switch OFF and disconnect VDC/TCS/ABS control unit connector and connector of wheel sensor
where malfunction was detected. Check terminals for deformation and connectors for poor contact. Then
reconnect connectors. Also make sure interference with other parts has not cut wheel sensor cables.

Drive vehicle at 30 km/h (19 MPH) or above for at least 1minute. Does ABS warning lamp turn off?

YES

>> INSPECTION END

NO

>> GO TO 4.

4. 

CHECK SENSOR ROTOR 

Check sensor rotor teeth and surface of rubber for damage.

OK or NG

OK

>> GO TO 5.

NG

>> Replace sensor rotor.

Self-diagnostic results

FR RH SENSOR -1, -2

FR LH SENSOR -1, -2

RR RH SENSOR -1, -2

RR LH SENSOR -1, -2

ABS SENSOR [ABNORMAL SIGNAL]

BRC-36

[VDC/TCS/ABS]

TROUBLE DIAGNOSIS FOR SYSTEM

5. 

CHECK WHEEL SENSOR HARNESS 

1.

Turn ignition switch OFF and disconnect malfunctioning wheel
sensor connector and VDC/TCS/ABS control unit connector.

2.

Check the continuity between terminals. (Also check the conti-
nuity when steering wheel is turned right and left and when sen-
sor harness inside wheel well is moved.)

OK or NG

OK

>> GO TO 6.

NG

>> Repair or replace harness and connector that have malfunction.

6. 

CHECK WHEEL SENSOR POWER SUPPLY CIRCUIT

1.

Disconnect malfunctioning wheel sensor connector.

2.

Turn ignition switch OFF and check voltage between wheel sen-
sor harness connector power supply terminal and ground,

OK or NG?

OK

>> Replace wheel sensor.

NG

>> Replace VDC/TCS/ABS control unit.

SFIA2710E

Power supply circuit

Signal circuit

Ground circuit

Wheel

VDC/TCS/ABS 

control unit 

Wheel sensor

VDC/TCS/ABS 

control unit 

Wheel sensor

VDC/TCS/ABS 

control unit 

(Signal)

VDC/TCS/ABS 

control unit

(Ground)

Front RH

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2

15, 16

—

Front LH

10

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8, 10

Rear RH 

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2

11, 12

Rear LH 

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13

4

13, 14

Power supply circuit

: Continuity should exist.

Signal circuit

: Continuity should exist.

Ground circuit

: Continuity should not exist.

SFIA3342E