Infiniti QX56 (Z62). Manual - part 223

CCS

POWER SUPPLY AND GROUND CIRCUIT

CCS-159

< DTC/CIRCUIT DIAGNOSIS >

[ICC]

C

D

E

F

G

H

I

J

K

L

M

B

N

P

A

3.

Check for continuity between ICC sensor harness connector and ground. 

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair the ICC sensor ground circuit.

ICC sensor

Ground

Continuity

Connector

Terminal

E65

4

Existed

CCS-160

< SYMPTOM DIAGNOSIS >

[ICC]

INTELLIGENT CRUISE CONTROL SYSTEM SYMPTOMS

SYMPTOM DIAGNOSIS

INTELLIGENT CRUISE CONTROL SYSTEM SYMPTOMS

Symptom Table

INFOID:0000000006224440

Symptoms

Reference page

Operation

MAIN switch does not turn ON

 Refer to 

CCS-161, "Description"

MAIN switch does not turn OFF

ICC system cannot be set (MAIN switch turns 
ON/OFF)

 Refer to 

CCS-162, "Description"

CANCEL switch does not function

 Refer to 

CCS-164, "Description"

Resume does not function

Set speed does not increase

Set distance to a vehicle ahead cannot be 
changed

ICC is not canceled when the A/T selector lever 
is “N” position

Refer to 

CCS-165, "Description"

Display/Chime

ICC system display not appear

Refer to 

MWI-29, "On Board Diagnosis Function"

Chime does not sound

Refer to 

CCS-166, "Description"

Control

Driving force is hunting

Refer to 

CCS-168, "Description"

Function to detect 
a vehicle ahead

System frequently cannot detect a vehicle ahead

Refer to 

CCS-169, "Description"

Distance to detect a vehicle ahead is short

System misidentifies a vehicle even though there 
is no vehicle ahead

• Adjust laser beam aiming: Refer to 

CCS-72, "Descrip-

tion"

 

• Perform ICC system action test. Refer to 

CCS-77, "De-

scription"

System misidentifies a vehicle in the next lane

System does not detect a vehicle at all

Refer to 

CCS-171, "Description"

CCS

MAIN SWITCH DOES NOT TURN ON, MAIN SWITCH DOES NOT TURN OFF

CCS-161

< SYMPTOM DIAGNOSIS >

[ICC]

C

D

E

F

G

H

I

J

K

L

M

B

N

P

A

MAIN SWITCH DOES NOT TURN ON, MAIN SWITCH DOES NOT TURN
OFF

Description

INFOID:0000000006224441

MAIN switch does not turn ON

• ICC system display does not appear even when MAIN switch is pressed. 

MAIN switch does not turn OFF

• When ICC system display is ON, display does not turn OFF even if MAIN switch is pressed. 
NOTE:
When ICC system warning lamp illuminates, perform the self-diagnosis of ICC system, and then repair or
replace the malfunctioning parts. 

Diagnosis Procedure

INFOID:0000000006224442

1.

MAIN SWITCH INSPECTION

1.

Start the engine.

2.

Check that “MAIN SW” and “CRUISE LAMP” operate normally in “DATA MONITOR” of “ICC/ADAS” with
CONSULT-III. 

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

CHECK COMBINATION METER

Check that “CRUISE IND” operates normally in “DATA MONITOR” of “METER/M&A”. 
Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 4.

3.

PERFORM SELF-DIAGNOSIS OF COMBINATION METER

1.

Perform “Self Diagnostic Result” of “METER/M&A”. 

2.

Check if DTC is detected. Refer to 

MWI-43, "DTC Index"

.

Is any DTC detected?

YES

>> Repair or replace malfunctioning parts. 

NO

>> GO TO 4.

4.

PERFORM SELF-DIAGNOSIS RESULTS OF ICC SYSTEM

1.

Perform “All DTC Reading”. 

2.

Check if the “U1000” is detected in self-diagnosis results of “ICC/ADAS”. 

Is “U1000” detected?

YES

>> GO TO 5.

NO

>> GO TO 6.

5.

CAN COMMUNICATIONS INSPECTION

Check the CAN communication and repair or replace malfunctioning parts. Refer to 

CCS-145, "ADAS CON-

TROL UNIT : DTC Logic"

. 

>> INSPECTION END

6.

CHECK ICC STEERING SWITCH

Check the ICC steering switch. Refer to 

CCS-177, "Exploded View"

.

>> INSPECTION END

CCS-162

< SYMPTOM DIAGNOSIS >

[ICC]

ICC SYSTEM CANNOT BE SET (MAIN SWITCH TURNS ON/OFF)

ICC SYSTEM CANNOT BE SET (MAIN SWITCH TURNS ON/OFF)

Description

INFOID:0000000006224443

The MAIN switch can be turned ON/OFF, but the ICC system cannot be set even if the SET/COAST switch is
pressed. 
NOTE:
The system cannot be set in the following case. 
• When the vehicle ahead is not detected below the speed of 32 km/h (20 MPH).
• When the selector lever is not in the “D” position or manual mode.
• When the front wipers are operating at HI.

(If the vehicle is equipped with a rain sensing auto-wiper, the system may cancel when the wipers are set to
AUTO)

• When the brake pedal is depressed. 
• When driving into a strong light (i.e., sunlight).
• When the VDC is turned OFF.
• When ABS or VDC (including the TCS) operates.
• When a wheel slips.
• When SNOW mode switch is turned ON.
• When ABS warning lamp is ON.
• When 4WD shift switch is not AUTO position.

Diagnosis Procedure

INFOID:0000000006224444

1.

CHECK CAUSE OF AUTOMATIC CANCELLATION

Check if there is the cancellation cause in the “CAUSE OF AUTO-CANCEL” on “WORK SUPPORT” of “ICC/
ADAS” with CONSULT-III. 

Is it displayed?

Not displayed>>GO TO 2.
“OPE SW VOLT CIRC”>>Refer to 

CCS-94, "DTC Logic"

. 

“VHCL SPD UNMATCH”>>Refer to 

CCS-87, "DTC Logic"

. 

“IGN LOW VOLT”>>Refer to 

CCS-85, "ADAS CONTROL UNIT : DTC Logic"

. 

“ECM CIRCUIT”>>Refer to 

CCS-103, "DTC Logic"

. 

“CAN COMM ERROR”>>Refer to 

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

.

“ICC SENSOR CAN COMM ERR”>>Refer to 

CCS-137, "DTC Logic"

. 

“ABS/TCS/VDC CIRC”>>Refer to 

CCS-89, "DTC Logic"

.

“ECD CIRCUIT”>>Refer to 

CCS-115, "DTC Logic"

. 

2.

PERFORM THE SELF-DIAGNOSIS

1.

Perform “All DTC Reading”. 

2.

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

CCS-50,

"DTC Index"

 (ICC/ADAS) or 

CCS-55, "DTC Index"

 (LASER).

Is any DTC detected?

YES

>> GO TO 3.

NO

>> GO TO 4.

3.

REPAIR OR REPLACE MALFUNCTIONING PARTS

Repair or replace malfunctioning parts identified by the self-diagnosis result. 

>> GO TO 6.

4.

CHECK EACH SWITCH AND VEHICLE SPEED SIGNAL

1.

Start the engine.

2.

Check that the following items operate normally in “DATA MONITOR” of “ICC/ADAS”. 

-

“VHCL SPEED SE”

-

“D RANGE SW”

-

“SET/COAST SW”

-

“BRAKE SW”

-

“WIPER  SW”