Infiniti G37 Coupe. Manual — part 1263
C1914 REAR WHEEL STEERING ANGLE SENSOR
STC-103
< COMPONENT DIAGNOSIS >
[WITH 4WAS]
C
D
E
F
H
I
J
K
L
M
A
B
STC
N
O
P
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace 4WAS rear actuator. Refer to
Special Repair Requirement
INFOID:0000000001666415
BEFORE REPLACING 4WAS MAIN CONTROL UNIT
• Record the self-diagnosis results (history).
CAUTION:
• Never erase the memory (history) of self-diagnosis results when replacing 4WAS main control unit
after diagnosis.
• Erase the memory of the self-diagnosis results (record) after printing out or recording all the val-
ues of “DATA MONITOR”.
Rear wheel steering angle sensor
Resistance (Approx.)
Connector
Terminal
B35
1 – 3
1 k
Ω
1 – 2
1.2 – 1.5 k
Ω
1 – 4
1.2 – 1.5 k
Ω
STC-104
< COMPONENT DIAGNOSIS >
[WITH 4WAS]
C1915, C1916 REAR WHEEL STEERING ANGLE SENSOR
C1915, C1916 REAR WHEEL STEERING ANGLE SENSOR
Description
INFOID:0000000001666416
• It detects the steering angle condition of rear wheel.
• 2 systems (main and sub sensor) are equipped.
DTC Logic
INFOID:0000000001666417
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
RECHECK DTC
With CONSULT-III
1.
Turn the ignition switch from OFF to ON.
2.
Perform 4WAS main control unit self-diagnosis.
Is DTC “C1915” or “C1916” detected?
YES
>> Proceed to diagnosis procedure. Refer to
STC-104, "Diagnosis Procedure"
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000001666418
1.
CHECK 4WAS REAR ACTUATOR
1.
Turn the ignition switch OFF.
2.
Measure “A” and “B” of 4WAS rear actuator as shown in the fig-
ure.
Is the differential of “A” and “B” 5.8 mm (0.228 in) or less?
YES
>> GO TO 2.
NO
>> Replace 4WAS rear actuator. Refer to
.
2.
CHECK REAR WHEEL STEERING ANGLE SENSOR (1)
With CONSULT-III
1.
Start engine.
CAUTION:
Check condition with the vehicle stopped.
2.
Check DATA MONITOR “RR ST ANG-MAI” and “RR ST ANG-SUB” value of 4WAS main control unit.
Is the inspection result normal?
YES
>> GO TO 3.
DTC
Items
(CONSULT-III screen terms)
Diagnostic item is detected when...
Possible cause
C1915
RR ST ANGLE SENSOR
[MAIN SIGNAL]
The rear wheel angle sensor signal (main) error is de-
tected.
Rear wheel steering sen-
sor output voltage error
C1916
RR ST ANGLE SENSOR
[SUB SIGNAL]
If the rear wheel angle sensor signal (sub) error is de-
tected.
Rear wheel steering sen-
sor output voltage error
JSGIA0086ZZ
Monitored item
Condition
Display value
RR ST ANG-MAI
Straight-ahead
Approx. 2.4 V
RR ST ANG-SUB
Straight-ahead
Approx. 2.6 V
C1915, C1916 REAR WHEEL STEERING ANGLE SENSOR
STC-105
< COMPONENT DIAGNOSIS >
[WITH 4WAS]
C
D
E
F
H
I
J
K
L
M
A
B
STC
N
O
P
NO
>> Replace 4WAS rear actuator. Refer to
3.
CHECK REAR WHEEL STEERING ANGLE SENSOR (2)
Check the voltage between 4WAS main control unit harness connector terminal and ground.
Is the differential between terminal voltage No. 4 and No.7 approximately 1 V or more?
YES
>> Replace 4WAS main control unit. Refer to
NO
>> GO TO 4.
4.
CHECK REAR WHEEL STEERING ANGLE SENSOR (3)
1.
Turn the ignition switch OFF.
2.
Disconnect rear wheel steering angle sensor harness connector.
3.
Check resistance between rear wheel steering angle sensor connector terminals.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace 4WAS rear actuator. Refer to
5.
CHECK REAR WHEEL STEERING ANGLE SENSOR GROUND CIRCUIT
1.
Disconnect 4WAS main control unit harness connector.
2.
Check for continuity between 4WAS main control unit harness connector terminal and rear wheel steering
angle sensor harness connector terminal.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace each harness and connector.
6.
PERFORM SELF-DIAGNOSIS (4WAS MAIN CONTROL UNIT)
With CONSULT-III
1.
Connect 4WAS main control unit harness connector.
2.
Connect rear wheel steering angle sensor harness connector.
3.
Perform 4WAS main control unit self-diagnosis.
4WAS main control unit
Voltage (Approx.)
Connector
Terminal
B54
4 – Ground
2.4 V
7 – Ground
2.6 V
Rear wheel steering angle sensor
Resistance (Approx.)
Connector
Terminal
B35
1 – 3
1 k
Ω
1 – 2
1.2 – 1.5 k
Ω
1 – 4
1.2 – 1.5 k
Ω
4WAS main control unit
Rear wheel steering angle
sensor
Continuity
Connector
Terminal
Connector
Terminal
B54
4
B35
1, 2, 3
Not existed
B54
4
B35
4
Existed
B54
7
B35
1, 3, 4
Not existed
B54
7
B35
2
Existed
B54
5
B35
1
Existed
B54
5
B35
2, 3, 4
Not existed
B54
15
B35
1, 2, 4
Not existed
B54
15
B35
3
Existed
STC-106
< COMPONENT DIAGNOSIS >
[WITH 4WAS]
C1915, C1916 REAR WHEEL STEERING ANGLE SENSOR
Is DTC “C1915” or “C1916” detected?
YES
>> Replace 4WAS main control unit. Refer to
NO
>> GO TO 7.
7.
CHECK INFORMATION
With CONSULT-III
Check the “DATA MONITOR” value of each DTC detected with the self-diagnosis function. Refer to
.
Is each data standard?
YES
>> Check pin terminal and connection of each harness connector for non-standard conditions.
NO
>> Replace 4WAS main control unit. Refer to
Component Inspection
INFOID:0000000001666419
1.
CHECK REAR WHEEL STEERING ANGLE SENSOR
1.
Turn the ignition switch OFF.
2.
Disconnect rear wheel steering angle sensor harness connector.
3.
Check the resistance between rear wheel steering angle sensor connector terminals.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace 4WAS rear actuator. Refer to
Special Repair Requirement
INFOID:0000000001666420
BEFORE REPLACING 4WAS MAIN CONTROL UNIT
• Record the self-diagnosis results (history).
CAUTION:
• Never erase the memory (history) of self-diagnosis results when replacing 4WAS main control unit
after diagnosis.
• Erase the memory of the self-diagnosis results (record) after printing out or recording all the val-
ues of “DATA MONITOR”.
Rear wheel steering angle sensor
Resistance (Approx.)
Connector
Terminal
B35
1 – 3
1 k
Ω
1 – 2
1.2 – 1.5 k
Ω
1 – 4
1.2 – 1.5 k
Ω
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