Infiniti Q45. Manual - part 269

 

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Infiniti Q45. Manual - part 269

 

 

TROUBLE DIAGNOSIS FOR SYSTEM

BRC-41

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

3. 

CHECK CONNECTOR

1.

Turn ignition switch “OFF”.

2.

Disconnect steering angle sensor connector M52 and VDC/TCS/ABS control unit connector E218. And
check terminals 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.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 4.

4. 

CHECK STEERING ANGLE SENSOR CIRCUIT

1.

Turn ignition switch “OFF”.

2.

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

3.

Check continuity between VDC/TCS/ABS control unit harness
connector E218 and steering angle sensor harness connector
M52.

OK or NG

OK

>> GO TO 5.

NG

>> Open or short in harness. Repair or replace suspect har-

ness.

5. 

CHECK DATA MONITOR 

 With CONSULT-II

1.

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

2.

Select “DATA MONITOR” mode for “VDC” with CONSULT-II.

3.

Execute “DATA MONITOR” for “STEERING ANGLE SIGNAL”. Make sure that results are normal.

OK or NG

OK

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

NG

>> Replace spiral cable (steering angle sensor) and adjust neutral position of steering angle sensor.

Refer to 

BRC-6, "Adjustment of Steering Angle Sensor Neutral Position"

 .

2 - 3

: Continuity should exist.

SFIA2314E

Steering condition

Data monitor

Driving straight

-5

°

 to +5

°

Turn 90

°

 to right

Approx. +90

°

Turn 90

°

 to left

Approx. -90

°

BRC-42

[VDC/TCS/ABS]

TROUBLE DIAGNOSIS FOR SYSTEM

Yaw Rate/Side G Sensor

NFS000D3

CAUTION:

Sudden turns (such as spin turns, acceleration turns), drifting, etc. When VDC function is off (VDC
OFF switch “ON”) may cause yaw rate/side G sensor system to indicate a malfunction. However,
this is not a malfunction, if normal operation can be resumed after restarting engine. Then erase
memory of self-diagnosis.

If vehicle is on turn-table at entrance to parking garage, or on other moving surface, VDC OFF
indicator lamp may illuminate and CONSULT-II self-diagnosis may indicate yaw rate sensor sys-
tem malfunction. However, in this case there is no malfunction in yaw rate sensor system. Take
vehicle off of turn-table or other moving surface, and start engine. Results will return to normal.
And after doing spin turns or acceleration turns with VDC function is off (VDC OFF switch “ON”),
too, the results will return to a normal state by re-starting vehicle. 

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 CONNECTOR

1.

Turn ignition switch “OFF”.

2.

Disconnect yaw rate/side G sensor connector M99 and VDC/TCS/ABS control unit connector E218 and
check terminals 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.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 3.

Self-diagnosis results

YAW RATE SENOR

SIDE G-SENSOR CIRCUIT

TROUBLE DIAGNOSIS FOR SYSTEM

BRC-43

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

3. 

CHECK YAW RATE/SIDE G SENSOR POWER SUPPLY CIRCUIT

1.

Turn ignition switch “OFF”.

2.

Disconnect yaw rate/side G sensor connector M99.

3.

Turn ignition switch “ON” or “OFF”.

4.

Check voltage between yaw rate/side G sensor harness con-
nector M99 terminal 3 and ground.

OK or NG

OK

>> GO TO 4.

NG

>>

Repair or replace malfunctioning components.

Perform the self-diagnosis, and make sure that the result shows 

NO DTC IS DETECTED

.

4. 

CHECK YAW RATE/SIDE G SENSOR HARNESS 

1.

Turn ignition switch “OFF”.

2.

Disconnect yaw rate/side G sensor connector and VDC/TCS/ABS control unit connector.

3.

Check continuity between VDC/TCS/ABS control unit harness
connector E218 and yaw rate/side G sensor harness connector
M99.

OK or NG

OK

>> GO TO 5.

NG

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

5. 

CHECK DATA MONITOR 

 With CONSULT-II

1.

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

2.

Select “DATA MONITOR” mode for “VDC” with CONSULT-II.

3.

Check “DATA MONITOR” for yaw rate /side G sensor. Make sure that results are normal.

OK or NG

OK

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

NG

>> Malfunction of yaw rate/side G sensor. Replace sensor and perform VDC/TCS/ABS control unit

self-diagnosis again.

Yaw rate/side G sen-

sor

Ground

Condition

Voltage

3

Ignition switch 

ON

Battery voltage

(Approx. 12 V)

Ignition switch 

OFF

Approx. 0V

SFIA3044E

78 - 1

: Continuity should exist.

77 - 2

: Continuity should exist.

79 - 4

: Continuity should exist.

18 - 5

: Continuity should exist.

80 - 6

: Continuity should exist.

PFIA0774E

Vehicle condition

Yaw rate sensor

(Data monitor stan-

dard)

Side G sensor

(Data monitor stan-

dard)

Stopped

Approx. 0 deg/s

Approx. 0 m/s

2

Turning right

Negative value

Negative value

Turning left

Positive value

Positive value

BRC-44

[VDC/TCS/ABS]

TROUBLE DIAGNOSIS FOR SYSTEM

Solenoid and VDC Switching Valve

NFS000D4

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 CONNECTOR

1.

Turn ignition switch OFF and disconnect VDC/TCS/ABS control unit connector E218 and VDC actuator
connector E21, E22, check terminal for deformation, disconnection, and so on. If any malfunction is found,
repair or replace terminal.

2.

Reconnect connectors and then perform the self-diagnosis.

OK or NG

OK

>> INSPECTION END.

NG

>> GO TO 3.

Self-diagnosis results

FR LH IN ABS SOL

FR LH OUT ABS SOL 

RR RH IN ABS SOL

RR RH OUT ABS SOL

FR RH IN ABS SOL

FR RH OUT ABS SOL

RR LH IN ABS SOL

RR LH OUT ABS SOL

PRIMARY SIDE USV CIRCUIT

SECONDARY SIDE USV CIRCUIT

PRIMARY SIDE HSV CIRCUIT

SECONDARY SIDE HSV CIRCUIT

 

 

 

 

 

 

 

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