Infiniti Q45. Manual — part 268

TROUBLE DIAGNOSIS FOR SYSTEM

BRC-37

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

5.

CHECK WHEEL SENSOR HARNESS

1.

Turn ignition switch “OFF”.

2.

Disconnect malfunctioning wheel sensor connector E20 (FR-
RH), E70 (FR-LH), B35 (RR-RH, RR-LH) and VDC/TCS/ABS
control unit harness connector E218.

3.

Check continuity between terminals. (Also check the continuity
when steering wheel is turned right and left and when sensor
harness inside wheel well is moved.)

OK or NG

OK

>> GO TO 6.

NG

>> Repair harness and connector between VDC/TCS/ABS control unit and wheel sensor.

6.

CHECK WHEEL SENSOR

1.

Check resistance value of malfunctioning wheel sensor.

OK or NG

OK

>> Replace VDC/TCS/ABS control unit.

NG

>> Replace wheel sensor.

SFIA2491E

Power circuit

Signal circuit

Ground circuit

Wheel

VDC/TCS/ABS

control unit har-

ness connector

Wheel sensor

harness con-

nector

VDC/TCS/ABS

control unit har-

ness connector

Wheel sensor

harness con-

nector

VDC/TCS/ABS con-

trol unit harness con-

nector

Ground

Front RH

15

1

16

2

15, 16

—

Front LH

8

1

10

2

8, 10

Rear RH

11

1

12

2

11, 12

Rear LH

13

3

14

4

13, 14

Power circuit

: Continuity should exist.

Signal circuit

: Continuity should exist.

Ground circuit

: Continuity should not exist.

Residence value

Front RH wheel sensor

1 - 2

0.8-1.85 k

Ω

Front LH wheel sensor

1 - 2

Rear RH wheel sensor

1 - 2

Rear LH wheel sensor

3 - 4

SFIA2364E

BRC-38

[VDC/TCS/ABS]

TROUBLE DIAGNOSIS FOR SYSTEM

Engine System Control Signal

NFS000CZ

INSPECTION PROCEDURE

1.

CHECK SELF-DIAGNOSIS RESULTS

With CONSULT-II

1.

Turn ignition switch “ON”. (Do not start engine.)

2.

Select “SELF-DIAG RESULTS” mode for “VDC” with CONSULT-II.

3.

Touch “ERASE”.

4.

Turn ignition switch “OFF” and wait at least 10 seconds.

5.

Check the self-diagnostic results.

Is above displayed in the 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.
Refer to

EC-82, "TROUBLE DIAGNOSIS"

.

2.

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

OK or NG

OK

>> INSPECTION END

NG

>>

●

Repair or replace malfunctioning components.

●

Perform the self-diagnosis, and make sure that the result shows “NO DTC IS DETECTED”.

VDC/TCS/ABS Control Unit

NFS000D0

INSPECTION PROCEDURE

1.

CHECK SELF-DIAGNOSTIC RESULTS

With CONSULT-II

1.

Turn ignition switch “ON”. (Do not start engine.)

2.

Select “SELF-DIAG RESULTS” mode for “VDC” with CONSULT-II.

3.

Touch “ERASE”.

4.

Turn ignition switch “OFF” and wait at least 10 seconds.

5.

Check the self-diagnostic results.

CAUTION:

Replace VDC/TCS/ABS control unit when self-diagnostic result shows items other than those above.

Is above displayed in the self-diagnosis display?

YES

>>

●

Replace VDC/TCS/ABS control unit.

●

Perform to self-diagnosis, and make sure that the result shows “NO DTC IS DETECTED”.

NO

>> INSPECTION END

Self-diagnosis results

ENGINE SIGNAL 2

ENGINE SIGNAL 3

ENGINE SIGNAL 4

ENGINE SIGNAL 5

ENGINE SIGNAL 6

Self-diagnostic results

CONTROLLER FAILURE

EMERGENCY BRAKE

TROUBLE DIAGNOSIS FOR SYSTEM

BRC-39

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

Pressure Sensor

NFS000D1

INSPECTION PROCEDURE

1.

CHECK SELF-DIAGNOSIS RESULTS

With CONSULT-II

1.

Turn ignition switch “ON”. (Do not start engine.)

2.

Select “SELF-DIAG RESULTS” mode for “VDC” with CONSULT-II.

3.

Touch “ERASE”.

4.

Turn ignition switch “OFF” and wait at least 10 seconds.

5.

Check the self-diagnostic results.

Is above displayed in self-diagnosis display?

YES

>> GO TO 2.

NO

>> INSPECTION END

2.

CHECK CONNECTOR

1.

Turn ignition switch “OFF”.

2.

Disconnect VDC actuator connector E21 and VDC/TCS/ABS control unit connector E218, check termi-
nals for deformation, disconnection, looseness, and so on. If any malfunction is found. Repair or replace
terminal.

3.

Reconnect connectors and then perform the self-diagnosis. Refer to

BRC-24, "SELF-DIAG RESULT

MODE"

.

OK or NG

OK

>> INSPECTION END.

NG

>> GO TO 3.

3.

CHECK PRESSURE SENSOR CIRCUIT

1.

Turn ignition switch “OFF”.

2.

Disconnect VDC actuator connector and VDC/TCS/ABS control
unit connector.

3.

Check continuity between VDC/TCS/ABS control unit harness
connector E218 and VDC actuator harness connector E21.

OK or NG

OK

>> GO TO 4.

NG

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

harness.

Self-diagnosis results

PRESS SEN CIRCUIT

69 - 30

: Continuity should exist.

68 - 31

: Continuity should exist.

67 - 32

: Continuity should exist.

SFIA2601E

BRC-40

[VDC/TCS/ABS]

TROUBLE DIAGNOSIS FOR SYSTEM

4.

CHECK PRESSURE SENSOR

1.

Connect VDC actuator connector E21 and VDC/TCS/ABS control unit connector E218.

2.

Check pressure sensor value on “DATA MONITOR”.

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

NFS000D2

INSPECTION PROCEDURE

1.

CHECK CAN COMMUNICATION CIRCUIT

With CONSULT-II

1.

Turn ignition switch “ON”. (Do not start engine.)

2.

Select “SELF-DIAG RESULTS” mode for “VDC” with CONSULT-II.

3.

Touch “ERASE”.

4.

Turn ignition switch “OFF” and wait at least 10 seconds.

5.

Check the self-diagnostic results.

Is the “ST ANGLE SEN COM CIR” display?

YES

>> GO TO

LAN-17, "Precautions When Using CONSULT-II"

.

NO

>> GO TO 2.

2.

CHECK SELF-DIAGNOSIS RESULTS

With CONSULT-II

1.

Turn ignition switch “ON”. (Do not start engine.)

2.

Select “SELF-DIAG RESULTS” mode for “VDC” with CONSULT-II.

3.

Touch “ERASE”.

4.

Turn ignition switch “OFF” and wait at least 10 seconds.

5.

Check the self-diagnostic results.

Is the “ST ANGLE SEN CIRCUIT” display?

YES

>> GO TO 3.

NO

>> INSPECTION END

Condition

Data monitor display

Brake pedal depressed

Positive value

When brake pedal is released

Approx. 0 bar

Self-diagnosis results

ST ANGLE SEN COM CIR

Self-diagnosis results

ST ANGLE SEN CIRCUIT