Infiniti M35/M45 Y50. Manual — part 335
TROUBLE DIAGNOSIS FOR SYSTEM
BRC-41
[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.
2.
Disconnect stop lamp switch connector E124 and ABS actuator and electric unit (control unit) connector
E30.
3.
Check continuity between stop lamp switch harness connector and ABS actuator and electric unit (control
unit) harness connector.
OK or NG
OK
>> GO TO 5.
NG
>> Open or short in harness between stop lamp switch and ABS actuator and electric unit (control
unit). Repair or replace applied harness.
5.
CHECK PRESSURE SENSOR
1.
Connect ABS actuator and electric unit (control unit) connector.
2.
Perform “DATA MONITOR” of the “PRESS SENSOR” to check if the status is normal.
OK or NG
OK
>> INSPECTION END
NG
>> If the pressure sensor is damaged or malfunctioning, replace the ABS actuator and electric unit
(control unit).
Steering Angle Sensor Circuit
NFS000QS
INSPECTION PROCEDURE
1.
CHECK SELF-DIAGNOSIS RESULTS
Check self-diagnosis results.
Is above displayed on the self-diagnosis display?
YES
>> GO TO 2.
NO
>> INSPECTION END
2.
CHECK CONNECTOR
1.
Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector E30,
check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or
replace terminal.
2.
Reconnect connector and perform self-diagnosis.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 3.
ABS actuator and electric unit (control unit)
Stop lamp switch
Continuity
30
4
Yes
Condition
Data monitor display
When brake pedal is depressed.
−
40 to 300 bar
When brake pedal is released.
Approx. 0 bar
Self-diagnosis results
ST ANG SEN CIRCUIT
BRC-42
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SYSTEM
3.
CHECK STEERING ANGLE SENSOR HARNESS
1.
Check CAN communication system. Refer to
BRC-48, "CAN Communication Circuit"
.
2.
Turn ignition switch OFF and disconnect steering angle sensor connector.
3.
Check continuity between steering angle sensor harness con-
nector M47 terminal 2 and ground.
4.
Turn ignition switch ON and check voltage between steering
angle sensor harness connector M47 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 DATA MONITOR
1.
Turn ignition switch OFF and connect the steering angle sensor connector and ABS actuator and electric
unit (control unit) connector.
2.
Select “STR ANGLE SIG” in “DATA MONITOR” and check steering angle sensor signal.
OK or NG
OK
>> Perform self-diagnosis.
NG
>>
●
Replace spiral cable (steering angle sensor) and adjust neutral position of steering angle sen-
sor. Refer to
BRC-6, "Adjustment of Steering Angle Sensor Neutral Position"
.
●
Perform the self-diagnosis, and make sure that the result shows “NO DTC IS DETECTED”.
Steering angle sensor
Ground
Continuity
2
—
Yes
SFIA2970E
Steering angle sensor
Ground
Voltage
3
—
Battery voltage
(Approx. 12 V)
SFIA2971E
Steering condition
STR ANGLE SIG (DATA MONITOR)
Driving straight
– 2.5
°
to + 2.5
°
Turn 90
°
to right
Approx. + 90
°
Turn 90
°
to left
Approx. – 90
°
TROUBLE DIAGNOSIS FOR SYSTEM
BRC-43
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
Stop Lamp Switch Circuit
NFS000QU
INSPECTION PROCEDURE
1.
CHECK SELF-DIAGNOSIS RESULTS
Check self-diagnosis results.
Is above displayed on the self-diagnosis display?
YES
>> GO TO 2.
NO
>> INSPECTION END
2.
CHECK CONNECTOR
1.
Turn ignition switch OFF and disconnect stop lamp switch connector E124 and ABS actuator and electric
unit (control unit) connector E30, check terminal for deformation, disconnection, looseness, and so on. If
any malfunction is found, repair or replace terminal.
2.
Reconnect connectors securely.
3.
Start engine.
4.
Repeat pumping brake pedal carefully several times, and perform self-diagnosis.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 3.
3.
CHECK STOP LAMP SWITCH CIRCUIT
1.
Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector E30.
2.
Check voltage between ABS actuator and electric unit (control
unit) harness connector E30 terminal 30 and ground.
OK or NG
OK
>> Perform self-diagnosis.
NG
>>
●
Repair or replace stop lamp switch circuit.
●
Perform the self-diagnosis, and make sure that the result shows “NO DTC IS DETECTED”.
Self-diagnosis results
STOP LAMP SW
SFIA3038E
ABS actuator and electric unit (control unit)
Ground
Condition
Voltage
30
—
Brake pedal depressed
Battery voltage (Approx. 12 V)
Brake pedal not depressed
Approx. 0V
BRC-44
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SYSTEM
Yaw Rate/Side G Sensor Circuit
NFS000QV
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 being off (VDC OFF switch
“ON”), too, the results will return to a normal condition by re-starting vehicle.
INSPECTION PROCEDURE
1.
CHECK SELF-DIAGNOSIS RESULTS
Check self-diagnosis results.
Is above displayed on the self-diagnosis display?
YES
>> GO TO 2.
NO
>> INSPECTION END
2.
CHECK CONNECTOR
1.
Turn ignition switch OFF and disconnect yaw rate/side G sensor connector M145 and ABS actuator and
electric unit (control unit) connector E30, check terminal for deformation, disconnection, looseness, and
so on. If any malfunction is found, repair or replace terminal.
2.
Reconnect connector and perform self-diagnosis.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 3.
3.
CHECK YAW RATE/SIDE G SENSOR POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF and disconnect yaw rate/side G sensor connector M145.
2.
Turn ignition switch ON or OFF and check voltage between yaw
rate/side G sensor harness connector M145 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”.
Self-diagnosis results
YAW RATE SENSOR
SIDE G-SEN CIRCUIT
Yaw rate/side G sensor
Ground
Condition
Voltage
3
—
Ignition switch ON
Battery voltage
(Approx. 12 V)
Ignition switch OFF
Approx. 0 V
SFIA3044E
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