Infiniti QX56 (Z62). Manual - part 211

CCS

C1A21 UNIT HIGH TEMP

CCS-111

< DTC/CIRCUIT DIAGNOSIS >

[ICC]

C

D

E

F

G

H

I

J

K

L

M

B

N

P

A

C1A21 UNIT HIGH TEMP

ADAS CONTROL UNIT

ADAS CONTROL UNIT : DTC Logic

INFOID:0000000006224341

DTC DETECTION LOGIC

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn the ignition switch OFF.

2.

Wait for 10 minutes or more to cool the ICC sensor. 

3.

Start the engine.

4.

Turn the MAIN switch of ICC system ON. 

5.

Perform “All DTC Reading” with CONSULT-III. 

6.

Check if the “C1A21” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS”. 

Is “C1A21” detected as the current malfunction?

YES

>> Refer to 

CCS-111, "ADAS CONTROL UNIT : Diagnosis Procedure"

.

NO

>> Refer to 

GI-40, "Intermittent Incident"

.

ADAS CONTROL UNIT : Diagnosis Procedure

INFOID:0000000006224342

1.

CHECK SELF-DIAGNOSIS RESULTS

Check if “C1A21” is detected in “Self Diagnostic Result” of “LASER”. 

Is “C1A21” detected?

YES

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

CCS-111, "ICC SENSOR : DTC Logic"

. 

NO

>> Replace the ADAS control unit. Refer to 

DAS-63, "Removal and Installation"

. 

ICC SENSOR

ICC SENSOR : DTC Logic

INFOID:0000000006224343

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn the ignition switch OFF.

2.

Wait for 10 minutes or more.

3.

Start the engine.

4.

Turn the MAIN switch of ICC system ON. 

5.

Perform “All DTC Reading” with CONSULT-III. 

6.

Check if the “C1A21” is detected as the current malfunction in “Self Diagnostic Result” of “LASER”. 

Is “C1A21” detected as the current malfunction?

YES

>> Refer to 

CCS-111, "ADAS CONTROL UNIT : Diagnosis Procedure"

.

NO

>> Refer to 

GI-40, "Intermittent Incident"

.

DTC

(On board dis-

play)

Trouble diagnosis 

name

DTC detecting condition

Possible causes

C1A21

(21)

ICC SENSOR HIGH 
TEMP

ICC sensor judges high temperature abnormality

Temperature around the ICC sensor 
becomes high

DTC

Trouble diagnosis 

name

DTC detecting condition

Possible causes

C1A21

UNIT HIGH TEMP

Temperature detected by the temperature sensor 
integrated in ICC sensor remains less than -45 

°

C 

(-49 

°

F) or more than 105 

°

C (221 

°

F) for 5 sec-

onds or more

Temperature around the ICC sensor 
becomes extremely low or high

CCS-112

< DTC/CIRCUIT DIAGNOSIS >

[ICC]

C1A21 UNIT HIGH TEMP

ICC SENSOR : Diagnosis Procedure

INFOID:0000000006224344

1.

CHECK ENGINE COOLING SYSTEM

Check for any malfunctions in engine cooling system. 

Is engine cooling system normal?

YES

>> Replace the ICC sensor. Refer to 

CCS-176, "Exploded View"

. 

NO

>> Repair engine cooling system. 

CCS

C1A24 NP RANGE

CCS-113

< DTC/CIRCUIT DIAGNOSIS >

[ICC]

C

D

E

F

G

H

I

J

K

L

M

B

N

P

A

C1A24 NP RANGE

DTC Logic

INFOID:0000000006224345

DTC DETECTION LOGIC

NOTE:
If DTC “C1A24” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to 

CCS-145,

"ADAS CONTROL UNIT : DTC Logic"

. 

DTC CONFIRMATION PROCEDURE

1.

CHECK DTC REPRODUCE (1)

1.

Start the engine.

2.

Turn the MAIN switch of ICC system ON. 

3.

Wait for approximately 5 minutes or more after shifting the selector lever to “P” position. 

4.

Perform “All DTC Reading” with CONSULT-III. 

5.

Check if the “C1A24” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS”. 

Is “C1A24” detected as the current malfunction?

YES

>> Refer to 

CCS-113, "Diagnosis Procedure"

.

NO

>> GO TO 2.

2.

CHECK DTC REPRODUCE (2)

1.

Wait for approximately 5 minutes or more after shifting the selector lever to “N” position. 

2.

Perform “All DTC Reading”. 

3.

Check if the “C1A24” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS”. 

Is “C1A24” detected as the current malfunction?

YES

>> Refer to 

CCS-113, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-40, "Intermittent Incident"

. 

Diagnosis Procedure

INFOID:0000000006224346

1.

CHECK SELF-DIAGNOSIS RESULTS

Check if “U1000” is detected other than “C1A24” 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 NP POSITION SWITCH SIGNAL

Check that “NP RANGE SW” operates normally in “DATA MONITOR” of “ICC/ADAS”. 

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace the ADAS control unit. Refer to 

DAS-63, "Removal and Installation"

. 

3.

CHECK TCM DATA MONITOR

Check that “SLCT LVR POSI” 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 4.

DTC

(On board dis-

play)

Trouble diagnosis name

DTC detecting condition

Possible causes

C1A24

(24)

NP RANGE

A mismatch between a shift position signal 
transmitted from TCM via CAN communica-
tion and an current gear position signal contin-
ues for 60 seconds or more

• TCM
• Transmission range switch

CCS-114

< DTC/CIRCUIT DIAGNOSIS >

[ICC]

C1A24 NP RANGE

4.

PERFORM TCM SELF-DIAGNOSIS

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"

.