Infiniti FX35, FX50 (S51). Manual - part 1781

C1919 VEHICLE SPEED SIGNAL

STC-65

< DTC/CIRCUIT DIAGNOSIS >

[WITH REAR ACTIVE STEER]

C

D

E

F

H

I

J

K

L

M

A

B

STC

N

O

P

C1919 VEHICLE SPEED SIGNAL

Description

INFOID:0000000005549699

The vehicle speed signal is transmitted from ABS actuator and electric unit (control unit) to RAS control unit
via CAN communication.

DTC Logic

INFOID:0000000005549700

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 “C1919” or “RAS warning lamp flickering pattern:21” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

STC-65, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005549701

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

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 “C1919” or “RAS warning lamp flickering pattern:21” detected?

YES

>> Replace RAS control unit. Refer to 

STC-109, "Removal and Installation"

.

NO

>> GO TO 4.

DTC

Display items

Malfunction detected condition

Possible cause

C1919

VEHICLE SPEED SEN
[NO SIGNAL]

Malfunction is detected in vehicle speed signal that is 
output from ABS actuator and electric unit (control unit) 
via CAN communication.
(Improper signal inputs while driving.)

• ABS actuator and elec-

tric unit (control unit)

• CAN communication 

line

• RAS  control  unit

STC-66

< DTC/CIRCUIT DIAGNOSIS >

[WITH REAR ACTIVE STEER]

C1919 VEHICLE SPEED SIGNAL

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:0000000005549702

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”.

C1920 STEERING ANGLE SENSOR

STC-67

< DTC/CIRCUIT DIAGNOSIS >

[WITH REAR ACTIVE STEER]

C

D

E

F

H

I

J

K

L

M

A

B

STC

N

O

P

C1920 STEERING ANGLE SENSOR

Description

INFOID:0000000005549703

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

DTC Logic

INFOID:0000000005549704

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 “C1920” or “RAS warning lamp flickering pattern:22” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

STC-67, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005549705

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

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 “C1920” or “RAS warning lamp flickering pattern:22” detected?

YES

>> Replace RAS control unit. Refer to 

STC-109, "Removal and Installation"

.

NO

>> GO TO 4.

DTC

Display items

Malfunction detected condition

Possible cause

C1920

STEERING ANGLE SEN
[NO SIGNAL]

Malfunction is detected in steering angle sensor signal 
that is output from steering angle sensor via CAN com-
munication.
(No transmission from the steering angle sensor)

• Steering angle sensor
• CAN communication 

line

• RAS  control  unit

STC-68

< DTC/CIRCUIT DIAGNOSIS >

[WITH REAR ACTIVE STEER]

C1920 STEERING ANGLE SENSOR

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:0000000005549706

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”.