Infiniti QX56 (Z62). Manual - part 209

CCS

C1A14 ECM

CCS-103

< DTC/CIRCUIT DIAGNOSIS >

[ICC]

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C1A14 ECM

DTC Logic

INFOID:0000000006224326

DTC DETECTION LOGIC

NOTE:
If DTC “C1A14” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to 

CCS-145,

"ADAS CONTROL UNIT : DTC Logic"

. 

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine.

2.

Operate the ICC system and drive. 

CAUTION:

Always drive safely. 

3.

Stop the vehicle.

4.

Perform “All DTC Reading” with CONSULT-III. 

5.

Check if the “C1A14” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS”. 

Is “C1A14” detected as the current malfunction?

YES

>> Refer to 

CCS-103, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-40, "Intermittent Incident"

. 

Diagnosis Procedure

INFOID:0000000006224327

1.

CHECK SELF-DIAGNOSIS RESULTS

Check if “U1000” is detected other than “C1A14” 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.

PERFORM SELF-DIAGNOSIS OF ECM

Check if any DTC is detected in “Self Diagnostic Result” of “ENGINE”. 

Is any DTC detected?

YES

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

EC-98, "DTC Index"

.

NO

>> Replace the ADAS control unit. Refer to 

DAS-63, "Removal and Installation"

. 

DTC

(On board dis-

play)

Trouble diagnosis name

DTC detecting condition

Possible causes

C1A14

(14)

ECM CIRCUIT

If ECM is malfunctioning

• Accelerator pedal position sensor
• ECM
• ADAS control unit

CCS-104

< DTC/CIRCUIT DIAGNOSIS >

[ICC]

C1A15 GEAR POSITION

C1A15 GEAR POSITION

Description

INFOID:0000000006224328

ADAS control unit judges the gear position based on the following signals. 
• Current gear position signal transmitted from TCM via CAN communication. 
• Value of gear ratio calculated from input speed signal transmitted from TCM via CAN communication.
• Value of gear ratio calculated from the vehicle speed signal transmitted from ABS actuator and electric unit

(control unit) via CAN communication. 

DTC Logic

INFOID:0000000006224329

DTC DETECTION LOGIC

NOTE:
If DTC “C1A15” is detected along with DTC “U1000”, “C1A03”, or “C1A04”, first diagnose the DTC “U1000”,
“C1A03”, or “C1A04”. 
• Refer to 

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

 for DTC “U1000”.

• Refer to 

CCS-87, "DTC Logic"

 for DTC “C1A03”.

• Refer to 

CCS-89, "DTC Logic"

 for DTC “C1A04”.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine.

2.

Turn the MAIN switch of ICC system ON. 

3.

Drive the vehicle at 10 km/h (6 MPH) or faster for approximately 15 minutes or more. 

CAUTION:

Always drive safely. 

4.

Stop the vehicle.

5.

Perform “All DTC Reading” with CONSULT-III. 

6.

Check if “C1A15” is detected as the current malfunction in the “Self Diagnostic Result” of “ICC/ADAS”. 

Is “C1A15” detected as the current malfunction?

YES

>> Refer to 

CCS-104, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-40, "Intermittent Incident"

. 

Diagnosis Procedure

INFOID:0000000006224330

1.

CHECK SELF-DIAGNOSIS RESULTS

Check if “C1A03”, “C1A04”, or “U1000” is detected other than “C1A15” 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

>> GO TO 2.

2.

CHECK VEHICLE SPEED SIGNAL

Check that “VHCL SPEED SE” operates normally in “DATA MONITOR” of “ICC/ADAS”. 

CAUTION:

Be careful of the vehicle speed. 

Is the inspection result normal?

DTC

(On board dis-

play)

Trouble diagnosis 

name

DTC detecting condition

Possible causes

C1A15

(15)

GEAR POSITION

A mismatch between an current gear posi-
tion signal transmitted from TCM via CAN 
communication and a gear position calculat-
ed by the ADAS control unit continues for 
approximately 11 minutes or more

• Input speed sensor
• Vehicle speed sensor A/T (output speed 

sensor)

• TCM

CCS

C1A15 GEAR POSITION

CCS-105

< DTC/CIRCUIT DIAGNOSIS >

[ICC]

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YES

>> GO TO 3.

NO

>> GO TO 7.

3.

CHECK GEAR POSITION

Check that “GEAR” operates normally in “DATA MONITOR” of “ICC/ADAS”. 

CAUTION:

Be careful of the vehicle speed. 

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

CHECK GEAR POSITION SIGNAL

Check that “GEAR” operates normally in “DATA MONITOR” of “TRANSMISSION”. 
Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 6.

5.

CHECK INPUT SPEED SENSOR SIGNAL

Check that “INPUT SPEED” operates normally in “DATA MONITOR” of “TRANSMISSION”. 

Is the inspection result normal?

YES

>> Replace the ADAS control unit. Refer to 

DAS-63, "Removal and Installation"

. 

NO

>> GO TO 6.

6.

CHECK TCM SELF-DIAGNOSIS RESULTS

1.

Perform “All DTC Reading”. 

2.

Check if any DTC is detected in “Self Diagnostic Result” of “TRANSMISSION”. 

Is any DTC detected?

YES

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

TM-78, "DTC Index"

. 

NO

>> Replace the ADAS control unit. Refer to 

DAS-63, "Removal and Installation"

. 

7.

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

1.

Perform “All DTC Reading”. 

2.

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"

. 

CCS-106

< DTC/CIRCUIT DIAGNOSIS >

[ICC]

C1A16 RADAR STAIN

C1A16 RADAR STAIN

ADAS CONTROL UNIT

ADAS CONTROL UNIT : DTC Logic

INFOID:0000000006224331

DTC DETECTION LOGIC

NOTE:
DTC “C1A16” may be detected under the following conditions. (Explain to the customer about the difference
between the contamination detection function and the indication when the malfunction is detected and tell
them “This is not malfunction”.)
• When contamination or foreign materials adhere to the ICC sensor body window
• When driving while it is snowing or when frost forms on the ICC sensor body window
• When ICC sensor body window is temporarily fogged

ADAS CONTROL UNIT : Diagnosis Procedure

INFOID:0000000006224332

1.

CHECK ICC SENSOR SELF-DIAGNOSIS RESULTS

1.

Perform “All DTC Reading” with CONSULT-III.

2.

Check if the “C1A16” is detected as the current malfunction in “Self Diagnostic Result” of “LASER”.

Is “C1A16”detected?

YES

>> Refer to 

CCS-106, "ICC SENSOR : DTC Logic"

.

NO

>> GO TO 2.

2.

CHECK ADAS CONTROL UNIT SELF-DIAGNOSIS RESULTS

1.

Erase All self-diagnosis results with CONSULT-III.

2.

Perform “All DTC Reading”

3.

Check if the “C1A16” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS”.

Is “C1A16”detected?

YES

>> Replace ADAS control unit. Refer to 

DAS-63, "Removal and Installation"

.

NO

>> INSPECTION END

ICC SENSOR

ICC SENSOR : DTC Logic

INFOID:0000000006224333

DTC DETECTION LOGIC

NOTE:
DTC “C1A16” may be detected under the following conditions. (Explain to the customer about the difference
between the contamination detection function and the indication when the malfunction is detected and tell
them “This is not malfunction”.)
• When contamination or foreign materials adhere to the ICC sensor body window
• When driving while it is snowing or when frost forms on the ICC sensor body window
• When ICC sensor body window is temporarily fogged

DTC

(On board dis-

play)

Trouble diagnosis 

name

DTC detecting condition

Possible causes

C1A16

(16)

RADAR STAIN

If any stain occurs to ICC sensor body window

• Stain or foreign materials is deposit-

ed

• Cracks or scratches exist

DTC

Trouble diagnosis 

name

DTC detecting condition

Possible causes

C1A16

RADAR STAIN

If any stain occurs to ICC sensor body window

• Stain or foreign materials is deposit-

ed

• Cracks or scratches exist