Infiniti FX35, FX50 (S51). Manual — part 1779
C1914 REAR WHEEL STEERING ANGLE SENSOR
STC-57
< DTC/CIRCUIT DIAGNOSIS >
[WITH REAR ACTIVE STEER]
C
D
E
F
H
I
J
K
L
M
A
B
STC
N
O
P
YES
>> GO TO 3.
NO
>> Replace RAS actuator assembly. Refer to
.
3.
CHECK REAR WHEEL STEERING ANGLE SENSOR POWER SUPPLY CIRCUIT
1.
Disconnect RAS control unit harness connector.
2.
Check the continuity between RAS control unit harness connector and rear wheel steering angle sensor
harness connector.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace the harnesses and connectors.
4.
PERFORM SELF-DIAGNOSIS
1.
Connect RAS control unit harness connector.
2.
Connect the rear wheel steering angle sensor harness connector.
With CONSULT-III
1.
Turn the ignition switch from OFF to ON.
2.
Perform “4WAS(MAIN)/RAS/HICAS” self-diagnosis.
Without CONSULT-III
1.
Start the engine.
2.
Perform the self-diagnosis. Refer to
STC-38, "Diagnosis Description"
.
Is DTC “C1914” or “RAS warning lamp flickering pattern:24” detected?
YES
>> Replace RAS control unit. Refer to
STC-109, "Removal and Installation"
NO
>> GO TO 5.
5.
CHECK INFORMATION
With CONSULT-III
1.
Select “DATA MONITOR” of “4WAS(MAIN)/RAS/HICAS”.
2.
Check the “DATA MONITOR” value of each DTC detected with the self-diagnosis function. Refer to
.
Is each data the standard value?
YES
>> Check each harness connector pin terminal for disconnection.
NO
>> Replace RAS control unit. Refer to
STC-109, "Removal and Installation"
Component Inspection
INFOID:0000000005549687
1.
CHECK REAR WHEEL STEERING ANGLE SENSOR
1.
Turn the ignition switch OFF.
2.
Disconnect the rear wheel steering angle sensor harness connector.
3.
Check the resistance between the rear wheel steering angle sensor connector.
Is the inspection result normal?
YES
>> INSPECTION END
RAS control unit
Rear wheel steering angle sensor
Continuity
Connector
Terminal
Connector
Terminal
B37
5
B53
1
Existed
5
4
Not existed
15
4
Existed
15
1
Not existed
Rear wheel steering angle sensor
Resistance (Approx.)
Terminal
1
4
1 k
Ω
1
2
1.2 – 1.5 k
Ω
1
3
1.2 – 1.5 k
Ω
STC-58
< DTC/CIRCUIT DIAGNOSIS >
[WITH REAR ACTIVE STEER]
C1914 REAR WHEEL STEERING ANGLE SENSOR
NO
>> Replace RAS actuator assembly. Refer to
.
Special Repair Requirement
INFOID:0000000005549688
BEFORE REPLACING RAS CONTROL UNIT
• Record the self-diagnosis results (history).
CAUTION:
• Never erase the memory (history) of self-diagnosis results when replacing RAS 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”.
C1915, C1916 REAR WHEEL STEERING ANGLE SENSOR
STC-59
< DTC/CIRCUIT DIAGNOSIS >
[WITH REAR ACTIVE STEER]
C
D
E
F
H
I
J
K
L
M
A
B
STC
N
O
P
C1915, C1916 REAR WHEEL STEERING ANGLE SENSOR
Description
INFOID:0000000005549689
• It detects the steering angle condition of rear wheel.
• 2 systems (main and sub sensor) are equipped.
DTC Logic
INFOID:0000000005549690
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
DTC REPRODUCTION PROCEDURE
With CONSULT-III
1.
Turn the ignition switch from OFF to ON.
2.
Perform “4WAS(MAIN)/RAS/HICAS” self-diagnosis.
Without CONSULT-III
1.
Start the engine.
2.
Perform the self-diagnosis. Refer to
STC-38, "Diagnosis Description"
.
Is DTC “C1915”, “C1916” or “RAS warning lamp flickering pattern:24” detected?
YES
>> Proceed to diagnosis procedure. Refer to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005549691
1.
CHECK RAS REAR ACTUATOR
1.
Turn the ignition switch OFF.
2.
Measure (A) and (B) of RAS actuator assembly as shown in the
figure.
Is the differential of (A) and (B) 5.8 mm (0.228 in) or less?
YES
>> GO TO 2.
NO
>> Replace RAS actuator assembly. Refer to
2.
CHECK REAR WHEEL STEERING ANGLE SENSOR (1)
With CONSULT-III
1.
Start the engine.
CAUTION:
Check condition with the vehicle stopped.
2.
Select “DATA MONITOR” of “4WAS(MAIN)/RAS/HICAS”.
DTC
Display items
Malfunction detected condition
Possible cause
C1915
RR ST ANGLE SENSOR
[MAIN SIGNAL]
The rear wheel angle sensor signal (main) output signal
is malfunction.
• RAS actuator assembly
(Rear wheel angle sen-
sor)
• Harness or connector
• RAS control unit
C1916
RR ST ANGLE SENSOR
[SUB SIGNAL]
The rear wheel angle sensor signal (sub) output signal
is malfunction.
• RAS actuator assembly
(Rear wheel angle sen-
sor)
• Harness or connector
• RAS control unit
JSGIA0086ZZ
STC-60
< DTC/CIRCUIT DIAGNOSIS >
[WITH REAR ACTIVE STEER]
C1915, C1916 REAR WHEEL STEERING ANGLE SENSOR
3.
Check DATA MONITOR “RR ST ANG-MAI” and “RR ST ANG-SUB” value of RAS control unit.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Replace RAS actuator assembly. Refer to
.
3.
CHECK REAR WHEEL STEERING ANGLE SENSOR (2)
Check the voltage between RAS control unit harness connector and ground.
Is the differential between terminal voltage No. 4 and No.7 approximately 1 V or more?
YES
>> Replace RAS control unit. Refer to
STC-109, "Removal and Installation"
.
NO
>> GO TO 4.
4.
CHECK REAR WHEEL STEERING ANGLE SENSOR (3)
1.
Check the rear wheel steering angle sensor. Refer to
STC-61, "Component Inspection"
.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace RAS actuator assembly. Refer to
.
5.
CHECK REAR WHEEL STEERING ANGLE SENSOR GROUND CIRCUIT
1.
Disconnect RAS control unit harness connector.
2.
Check for continuity between RAS control unit harness connector and rear wheel steering angle sensor
harness connector.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace each harness and connector.
6.
PERFORM SELF-DIAGNOSIS
1.
Connect RAS control unit harness connector.
2.
Connect the rear wheel steering angle sensor harness connector.
With CONSULT-III
1.
Turn the ignition switch from OFF to ON.
2.
Perform “4WAS(MAIN)/RAS/HICAS” self-diagnosis.
Without CONSULT-III
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
RAS control unit
—
Voltage (Approx.)
Connector
Terminal
B37
4
Ground
2.4 V
7 2.6
V
RAS control unit
Rear wheel steering angle sensor
Continuity
Connector
Terminal
Connector
Terminal
B37
4
B53
1, 2, 4
Not existed
4
3
Existed
7
1, 3, 4
Not existed
7
2
Existed
5
2, 3, 4
Not existed
5
1
Existed
15
1, 2, 3
Not existed
15
4
Existed
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