Infiniti QX56 (Z62). Manual - part 697

EXL-80

< DTC/CIRCUIT DIAGNOSIS >

[XENON TYPE]

C0126 STEERING ANGLE SENSOR SIGNAL

C0126 STEERING ANGLE SENSOR SIGNAL

DTC Logic

INFOID:0000000006213944

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC ERASE

Erase the DTC memory of AFS with CONSULT-III.

>> GO TO 2.

2.

DTC CONFIRMATION

1.

Start the engine.

2.

Turn the steering wheel to the maximum right/left.

3.

Select the self-diagnosis with CONSULT-III.

4.

Check the self-diagnosis result. Refer to 

EXL-39, "DTC Index"

.

Is DTC “C0126” detected?

YES

>> Refer to 

EXL-80, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-40, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000006213945

1.

ABS ACTUATOR AND ELECTRICAL UNIT (CONTROL UNIT) SELF-DIAGNOSIS

Check the self-diagnosis result with CONSULT-III. Check that ABS actuator and electrical unit (control unit)
does not detect any DTCs.

Is any DTC detected?

YES

>> Check ABS actuator and electrical unit (control unit).Refer to 

BRC-51, "DTC Index"

.

NO

>> GO TO 2.

2.

DTC ERASE

Erase DTC memory of AFS with CONSULT-III.
Is the memory erased?

YES

>> Inspection end.

NO

>> Replace AFS control unit. Refer to 

EXL-135, "Removal and Installation"

DTC No.

Trouble diagnosis name

DTC detection condition

Possible causes

C0126

Steering angle sensor signal

In any of the following conditions
• The steering angle sensor signal 

is not received.

• The steering angle sensor signal 

error is received.

• Out-of-standard signal (-900

°

- 

+900

°

) is received.

• Steering angle sensor
• AFS control unit

C0428 STEERING ANGLE SENSOR CALIBRATION

EXL-81

< DTC/CIRCUIT DIAGNOSIS >

[XENON TYPE]

C

D

E

F

G

H

I

J

K

M

A

B

EXL

N

O

P

C0428 STEERING ANGLE SENSOR CALIBRATION

DTC Logic

INFOID:0000000006213946

Diagnosis Procedure

INFOID:0000000006213947

1.

STEERING ANGLE SENSOR NEUTRAL POSITION ADJUSTMENT

Perform the steering angle sensor neutral position adjustment.

CAUTION:

Perform the steering angle sensor neutral position adjustment on VDC side. VDC may activate incor-
rectly.

>> Refer to 

BRC-64, "Work Procedure"

.

DTC No.

Trouble diagnosis name

DTC detection condition

Possible causes

C0428

Steering angle sensor calibration

The steering angle sensor neutral 
position is not recognized.

Steering angle sensor

EXL-82

< DTC/CIRCUIT DIAGNOSIS >

[XENON TYPE]

U1000 CAN COMM CIRCUIT

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000006213948

CAN (Controller Area Network) is the serial transmission for real time application. CAN is the multiplex com-
munication for the vehicle with superior data transmission speed and error detection ability. Many electronic
control units are equipped on the vehicle. These control units do not operate individually, but associates with
other control units by sharing information. In CAN communication, each control unit is connected with two
communication lines (CAN-H and CAN-L). Much information is transmitted with fewer communication lines
than before. Each control unit transmits/receives data and reads the necessary data only. 
CAN Communication Signal Chart. Refer to 

LAN-27, "CAN COMMUNICATION SYSTEM : CAN System Spec-

ification Chart"

.

DTC Logic

INFOID:0000000006213949

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000006213950

1.

PERFORM SELF DIAGNOSTIC

1.

Turn ignition switch ON and wait for 2 seconds or more.

2.

Check “Self Diagnostic Result”.

Is “CAN COMM CIRCUIT” displayed?

YES

>> Refer to 

LAN-18, "Trouble Diagnosis Flow Chart"

.

NO

>> Refer to 

GI-40, "Intermittent Incident"

.

DTC No.

Trouble diagnosis name

DTC detection condition

Possible causes

U1000

CAN communication circuit

When AFS control unit does not trans-
mit/receive CAN communication signal 
continuously for 2 seconds or more

CAN communication system

U1010 CONTROL UNIT (CAN)

EXL-83

< DTC/CIRCUIT DIAGNOSIS >

[XENON TYPE]

C

D

E

F

G

H

I

J

K

M

A

B

EXL

N

O

P

U1010 CONTROL UNIT (CAN)

DTC Logic

INFOID:0000000006213951

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000006213952

1.

REPLACE AFS CONTROL UNIT

When DTC [U1010] is detected, replace AFS control unit.

>> Replace AFS control unit. Refer to 

EXL-135, "Removal and Installation"

DTC No.

Trouble diagnosis name

DTC detection condition

Possible cause

U1010

Control unit (CAN)

AFS control unit detected internal CAN 
communication circuit malfunction.

AFS control unit