Infiniti QX56 (Z62). Manual - part 214

CCS

C1A38 ACCELERATOR PEDAL ACTUATOR CAN 1

CCS-123

< DTC/CIRCUIT DIAGNOSIS >

[ICC]

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C1A38 ACCELERATOR PEDAL ACTUATOR CAN 1

DTC Logic

INFOID:0000000006224363

DTC DETECTION LOGIC

NOTE:
If DTC “C1A38” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to 

CCS-145,

"ADAS CONTROL UNIT : DTC Logic"

. 

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine.

2.

Turn the DCA system ON. 

3.

Perform “All DTC Reading” with CONSULT-III. 

4.

Check if the “C1A38” is detected as the current malfunction in self-diagnosis results of “ICC/ADAS”. 

Is “C1A38” detected as the current malfunction?

YES

>> Refer to 

CCS-123, "Diagnosis Procedure"

. 

NO

>> Refer to 

GI-40, "Intermittent Incident"

. 

Diagnosis Procedure

INFOID:0000000006224364

1.

CHECK ADAS CONTROL UNIT SELF-DIAGNOSIS RESULTS

Check if “U1000” is detected other than “C1A38” in “Self Diagnostic Result” of “ICC/ADAS”. 

Is “U1000” detected?

YES

>> Perform the CAN communication system inspection. Repair or replace the malfunctioning parts.

Refer to 

CCS-145, "ADAS CONTROL UNIT : DTC Logic"

. 

NO

>> GO TO 2.

2.

REPLACE ACCELERATOR PEDAL ASSEMBLY

1.

Turn the ignition switch OFF.

2.

Replace the accelerator pedal assembly. 

3.

Erases All self-diagnosis results. 

4.

Perform “All DTC Reading” again. 

5.

Check if the “C1A38” is detected in self-diagnosis results of “ICC/ADAS”. 

Is “C1A38” detected?

YES

>> Replace the ADAS control unit. Refer to 

DAS-63, "Removal and Installation"

. 

NO

>> INSPECTION END

DTC

(On board dis-

play)

Trouble diagnosis name

DTC detecting condition

Possible causes

C1A38

(132)

APA CAN CIR1

If ADAS control unit detects an error signal 
that is received from accelerator pedal actu-
ator via ITS communication

Accelerator pedal actuator malfunction

CCS-124

< DTC/CIRCUIT DIAGNOSIS >

[ICC]

C1A39 STEERING ANGLE SENSOR

C1A39 STEERING ANGLE SENSOR

ADAS CONTROL UNIT

ADAS CONTROL UNIT : DTC Logic

INFOID:0000000006224365

DTC DETECTION LOGIC

NOTE:
If DTC “C1A39” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to 

CCS-145,

"ADAS CONTROL UNIT : DTC Logic"

. 

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine.

2.

Turn the MAIN switch of ICC system ON. 

3.

Perform “All DTC Reading” with CONSULT-III. 

4.

Check if the “C1A39” is detected as the current malfunction in self-diagnosis results of “ICC/ADAS”. 

Is “C1A39” detected as the current malfunction?

YES

>> Refer to 

CCS-124, "ADAS CONTROL UNIT : Diagnosis Procedure"

.

NO

>> Refer to 

GI-40, "Intermittent Incident"

. 

ADAS CONTROL UNIT : Diagnosis Procedure

INFOID:0000000006224366

1.

CHECK SELF-DIAGNOSIS RESULTS

Check if “U1000” is detected other than “C1A39” in “Self Diagnostic Result” of “ICC/ADAS”. 
Is “U1000” detected?

YES

>> Perform the CAN communication system inspection. Repair or replace the malfunctioning parts.

Refer to 

CCS-145, "ADAS CONTROL UNIT : DTC Logic"

. 

NO

>> GO TO 2.

2.

CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS RESULTS

Check if any DTC is detected in “Self Diagnostic Result” of “ABS”. 
Is any DTC detected?

YES

>> Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to

BRC-51, "DTC Index"

. 

NO

>> Replace the ADAS control unit. Refer to 

DAS-63, "Removal and Installation"

. 

ICC SENSOR

ICC SENSOR : DTC Logic

INFOID:0000000006224367

DTC DETECTION LOGIC

NOTE:
If DTC “C1A39” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to 

CCS-145, "ICC

SENSOR : DTC Logic"

. 

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

DTC

(On board dis-

play)

Trouble diagnosis name

DTC detecting condition

Possible causes

C1A39

(39)

STRG SEN CIR

If the steering angle sensor is malfunction

Steering angle sensor

DTC

Trouble diagnosis name

DTC detecting condition

Possible causes

C1A39

STRG SEN CIR

If the steering angle sensor is malfunction

Steering angle sensor

CCS

C1A39 STEERING ANGLE SENSOR

CCS-125

< DTC/CIRCUIT DIAGNOSIS >

[ICC]

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1.

Start the engine.

2.

Turn the MAIN switch of ICC system ON. 

3.

Perform “All DTC Reading” with CONSULT-III. 

4.

Check if the “C1A39” is detected as the current malfunction in self-diagnosis results of “LASER”. 

Is “C1A39” detected as the current malfunction?

YES

>> Refer to 

CCS-125, "ICC SENSOR : Diagnosis Procedure"

.

NO

>> Refer to 

GI-40, "Intermittent Incident"

.

ICC SENSOR : Diagnosis Procedure

INFOID:0000000006224368

1.

CHECK ICC SENSOR SELF-DIAGNOSIS RESULTS

Check if “U1000” is detected other than “C1A39” in “Self Diagnostic Result” of “LASER”. 

Is “U1000” detected?

YES

>> Perform the CAN communication system inspection. Repair or replace the malfunctioning parts.

Refer to 

CCS-145, "ICC SENSOR : DTC Logic"

. 

NO

>> GO TO 2.

2.

CHECK ADAS CONTROL UNIT SELF-DIAGNOSIS RESULTS

Check if any DTC is detected in “Self Diagnostic Result” of “ICC/ADAS”. 

Is any DTC detected?

YES

>> Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to

CCS-50, "DTC Index"

. 

NO

>> Replace the ICC sensor. Refer to 

CCS-176, "Exploded View"

. 

CCS-126

< DTC/CIRCUIT DIAGNOSIS >

[ICC]

C1A40 SYSTEM SWITCH CIRCUIT

C1A40 SYSTEM SWITCH CIRCUIT

DTC Logic

INFOID:0000000006224369

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine and wait for approximately 10 minutes or more. 

2.

Perform “All DTC Reading” with CONSULT-III. 

3.

Check if the “C1A40” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS”. 

Is “C1A40” detected as the current malfunction?

YES

>> Refer to 

CCS-126, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-40, "Intermittent Incident"

. 

Diagnosis Procedure

INFOID:0000000006224370

1.

CHECK SELF-DIAGNOSIS RESULTS

Check if “U1000” is detected other than “C1A40” in “Self Diagnostic Result” of “ICC/ADAS”. 

Is “U1000” detected?

YES

>> Perform the CAN communication system inspection. Repair or replace the malfunctioning parts.

Refer to 

CCS-145, "ADAS CONTROL UNIT : DTC Logic"

. 

NO

>> GO TO 2.

2.

CHECK DATA MONITOR

Check that “IBA SW” operate normally in “DATA MONITOR” of “ICC/ADAS”.

Is the inspection result normal?

YES

>> Refer to 

GI-40, "Intermittent Incident"

. 

NO

>> GO TO 3.

3.

CHECK HARNESS BETWEEN ADAS CONTROL UNIT AND IBA OFF SWITCH

1.

Disconnect ADAS control unit connector. 

2.

Check for continuity between the ADAS control unit harness connector and IBA OFF switch harness con-
nector. 

3.

Check for continuity between ADAS control unit and ground. 

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair the harnesses or connectors.

DTC

(On board dis-

play)

Trouble diagnosis 

name

DTC detecting condition

Possible causes

C1A40

(40)

SYSTEM SW CIRC

IBA OFF switch remains “ON” (short circuit) for 
10 minutes or more

• IBA OFF switch circuit
• IBA OFF switch
• ADAS control unit

ADAS control unit

IBA OFF switch

Continuity

Connector

Terminal

Connector

Terminal

B61

3

M93

7

Existed

ADAS control unit

Ground

Continuity

Connector

Terminal

B61

3

 Not existed