Infiniti FX35, FX50 (S51). Manual - part 1783

C1924 STEERING ANGLE SENSOR

STC-73

< DTC/CIRCUIT DIAGNOSIS >

[WITH REAR ACTIVE STEER]

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C1924 STEERING ANGLE SENSOR

Description

INFOID:0000000005549715

Steering angle sensor signal is transmitted from steering angle sensor to RAS control unit via CAN communi-
cation.

DTC Logic

INFOID:0000000005549716

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 “C1924” or “RAS warning lamp flickering pattern: 22” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

STC-73, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005549717

1.

CHECK DRIVING

Drive for a short time.

Does the vehicle drive with front wheels in the straight-ahead position?

YES

>> GO TO 2.

NO

>> Adjust the wheel alignment. Refer to 

RSU-6, "Inspection"

.

2.

PERFORM SELF-DIAGNOSIS OF ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

With CONSULT-III

 Perform “ABS” self-diagnosis.

Is malfunction detected?

YES

>> Check malfunctioning circuit.

NO

>> GO TO 3.

3.

PERFORM SELF-DIAGNOSIS

With CONSULT-III

Perform “4WAS(MAIN)/RAS/HICAS” self-diagnosis.
Is DTC “U1000” or “U1010” detected?

YES

>> Check malfunctioning circuit.

NO

>> GO TO 4.

4.

PERFORM SELF-DIAGNOSIS

With CONSULT-III

1.

Turn the ignition switch from OFF to ON.

2.

Perform “4WAS(MAIN)/RAS/HICAS” self-diagnosis.

DTC

Display items

Malfunction detected condition

Possible cause

C1924

STEERING ANGLE SEN
[NO NEUT STATE]

Driving continuously at 10 km (6 MPH) or more while 
the steering angle sensor value is not L10

°

 - R10

°

.

• Steering angle sensor 
• CAN communication 

line

• RAS  control  unit

STC-74

< DTC/CIRCUIT DIAGNOSIS >

[WITH REAR ACTIVE STEER]

C1924 STEERING ANGLE SENSOR

Without CONSULT-III

1.

Start the engine.

2.

Perform the self-diagnosis. Refer to 

STC-38, "Diagnosis Description"

.

Is DTC “C1924” or “RAS warning lamp flickering pattern: 22” 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 

STC-

89, "Reference Value"

.

Is each data standard?

YES

>> Check pin terminal and connection of each harness connector for non-standard conditions.

NO

>> Replace RAS control unit. Refer to 

STC-109, "Removal and Installation"

.

Special Repair Requirement

INFOID:0000000005549718

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”.

C1926 STEERING ANGLE SENSOR

STC-75

< DTC/CIRCUIT DIAGNOSIS >

[WITH REAR ACTIVE STEER]

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D

E

F

H

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J

K

L

M

A

B

STC

N

O

P

C1926 STEERING ANGLE SENSOR

Description

INFOID:0000000005549719

Steering angle sensor signal is transmitted from steering angle sensor to RAS control unit via CAN communi-
cation.

DTC Logic

INFOID:0000000005549720

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC REPRODUCTION PROCEDURE

With CONSULT-III

1.

Start the engine.

CAUTION:

Stop the vehicle.

2.

Turn the steering wheel leftward slowly. Steer until the turning stops.

3.

Turn the steering wheel rightward slowly. Steer to the straight-forward position.

4.

Perform “4WAS(MAIN)/RAS/HICAS” self-diagnosis.

Without CONSULT-III

1.

Start the engine.

CAUTION:

Stop the vehicle.

2.

Turn the steering wheel leftward slowly. Steer until the turning stops.

3.

Turn the steering wheel rightward slowly. Steer to the straight-forward position.

4.

Perform the self-diagnosis. Refer to 

STC-38, "Diagnosis Description"

.

Is DTC “C1926” or “RAS warning lamp flickering pattern: 22” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

STC-75, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005549721

1.

PERFORM ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS

With CONSULT-III

 Perform “ABS” self-diagnosis. 

Is any error system detected?

YES

>> Check the error system.

NO

>> GO TO 2.

2.

PERFORM SELF-DIAGNOSIS

With CONSULT-III

Perform “4WAS(MAIN)/RAS/HICAS” self-diagnosis

Is DTC “U1000” or “U1010” detected?

YES

>> Check the error system.

NO

>> GO TO 3.

3.

PERFORM SELF-DIAGNOSIS

With CONSULT-III

DTC

Display items

Malfunction detected condition

Possible cause

C1926

STEERING ANGLE SEN

Malfunction is detected in steering angle sensor signal 
that is output from steering angle sensor via CAN com-
munication.
(When steering angle sensor signal is improper, the 
steering angle sensor itself detects the malfunction)

• Steering angle sensor 
• CAN communication 

line

• RAS  control  unit

STC-76

< DTC/CIRCUIT DIAGNOSIS >

[WITH REAR ACTIVE STEER]

C1926 STEERING ANGLE SENSOR

1.

Start the engine.

CAUTION:

Stop the vehicle.

2.

Turn the steering wheel leftward slowly. Steer until the turning stops.

3.

Turn the steering wheel rightward slowly. Steer to the straight-forward position.

4.

Perform “4WAS(MAIN)/RAS/HICAS” self-diagnosis.

Without CONSULT-III

1.

Start the engine.

CAUTION:

Stop the vehicle.

2.

Turn the steering wheel leftward slowly. Steer until the turning stops.

3.

Turn the steering wheel rightward slowly. Steer to the straight-forward position.

4.

Perform the self-diagnosis. Refer to 

STC-38, "Diagnosis Description"

.

Is DTC “C1926” or “RAS warning lamp flickering pattern: 22” detected?

YES

>> Replace RAS control unit. Refer to 

STC-109, "Removal and Installation"

.

NO

>> GO TO 4.

4.

INFORMATION CHECK

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 

STC-

89, "Reference Value"

.

Is each data the standard value?

YES

>> Check that there is no malfunction in each harness connector pin terminal or disconnection.

NO

>> Replace RAS control unit. Refer to 

STC-109, "Removal and Installation"

.

Special Repair Requirement

INFOID:0000000005549722

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”.