Infiniti QX56 (Z62). Manual - part 291

DAS

DCA SYSTEM NOT ACTIVATED (SWITCH IS ON)

DAS-201

< SYMPTOM DIAGNOSIS >

[DCA]

C

D

E

F

G

H

I

J

K

L

M

B

N

P

A

DCA SYSTEM NOT ACTIVATED (SWITCH IS ON)

Description

INFOID:0000000006223655

The dynamic driver assistance switch can be turned ON/OFF, but the DCA system does not operate. 
NOTE:
Never start the operation under the following conditions. 

No operation condition

• When the brake pedal depressed
• When the ICC system is set
• When the system judges that the vehicle comes to a standstill by the system control
• When the vehicle ahead is not detected

Operation cancellation condition

• When the dynamic driver assistance switch is turned to OFF
• When the system malfunction occurs
• When ABS or VDC (including the TCS) operates
• When the VDC is turned OFF
• When driving into a strong light (i.e., sunlight)
• When the ICC sensor body window is dirty and the measurement of the distance between the vehicles

becomes difficult

• When ABS warning lamp is ON
• When the SNOW mode switch is turned ON
• When the 4WD shift switch is not AUTO position

Diagnosis Procedure

INFOID:0000000006223656

1.

CHECK CAUSE OF AUTOMATIC CANCELLATION

Check if there is any 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 

DAS-138, "DTC Logic"

. 

“VHCL SPD UNMATCH”>>Refer to 

DAS-131, "DTC Logic"

. 

“IGN LOW VOLT”>>Refer to 

DAS-130, "DTC Logic"

. 

“CAN COMM ERROR”>>Refer to 

DAS-182, "ADAS CONTROL UNIT : DTC Logic"

. 

“ICC SENSOR CAN COMM ERR”>>Refer to 

DAS-177, "DTC Logic"

. 

“ABS/TCS/VDC CIRC”>>Refer to 

DAS-133, "DTC Logic"

. 

“APA HI TEMP”>>Refer to 

DAS-170, "DTC Logic"

. 

“ECD CIRCUIT”>>Refer to 

DAS-156, "DTC Logic"

. 

2.

PERFORM ALL OF THE SELF-DIAGNOSIS

1.

Perform “All DTC Reading”. 

2.

Check if any DTC is detected in self-diagnosis results of “ICC/ADAS”. Refer to 

DAS-100, "DTC Index"

.

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”

-

“BRAKE SW”

-

“DYNA ASIST SW”

Is there a malfunctioning item?

DAS-202

< SYMPTOM DIAGNOSIS >

[DCA]

DCA SYSTEM NOT ACTIVATED (SWITCH IS ON)

All items are normal>>GO TO 5.
“VHCL SPEED SE”>>Refer to 

DAS-131, "DTC Logic"

. 

“BRAKE SW”>>Refer to 

DAS-134, "DTC Logic"

. 

“DYNA ASIST SW”>>Refer to 

DAS-138, "DTC Logic"

. 

5.

REPLACE ADAS CONTROL UNIT

Replace the ADAS control unit. Refer to 

DAS-63, "Removal and Installation"

. 

>> GO TO 6.

6.

CHECK DCA SYSTEM

1.

Erase “self-diagnosis result”, and then perform “All DTC Reading” again after performing the action test.
(Refer to 

DAS-128, "Description"

 for action test.)

2.

Check that the DCA system is normal. 

>> INSPECTION END

DAS

CHIME DOES NOT SOUND

DAS-203

< SYMPTOM DIAGNOSIS >

[DCA]

C

D

E

F

G

H

I

J

K

L

M

B

N

P

A

CHIME DOES NOT SOUND

Description

INFOID:0000000006223657

The warning chime may not sound in some cases when there is a short distance between vehicles. Some
examples are:
• When the vehicles are traveling at the same speed and the distance between vehicles is not changing
• When the vehicle ahead is traveling faster and the distance between vehicles is increasing
• When a vehicle cuts in near own vehicle
• The warning chime will not sound when own vehicle approaches vehicles that are parked or moving slowly.
• The warning chime does not sound when the system does not detect any vehicle ahead. (Diagnose the con-

ditions under which the system is detecting the vehicle ahead and when the system is malfunctioning. If
there is any malfunction in detecting the vehicle ahead, check the system following the 

DAS-206, "Descrip-

tion"

.)

Diagnosis Procedure

INFOID:0000000006223658

1.

PERFORM ACTIVE TEST

Check if the warning chime sounds on the active test item “ICC BUZZER” of “ICC/ADAS” with CONSULT-III. 

Does the warning chime sound?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

CHECK THE MALFUNCTION SYMPTOM DURING WARNING CHIME OPERATION

Understand the vehicle ahead detection condition when the malfunction occurred. If the warning chime should
have sounded, replace the ADAS control unit. Refer to 

DAS-63, "Removal and Installation"

. 

>> GO TO 9.

3.

PERFORM THE SELF-DIAGNOSIS

1.

Perform “All DTC Reading” with CONSULT-III. 

2.

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

Is “U1000” detected?

YES

>> GO TO 4.

NO

>> GO TO 5.

4.

CAN COMMUNICATIONS INSPECTION

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

DAS-182, "ADAS CON-

TROL UNIT : DTC Logic"

. 

>> GO TO 9.

5.

PERFORM THE SELF-DIAGNOSIS OF COMBINATION METER

1.

Perform “All DTC Reading” with CONSULT-III. 

2.

Check if any DTC is detected in self-diagnosis results of “METER/M&A”. 

Is any DTC detected?

YES

>> Repair or replace malfunctioning parts. Refer to 

MWI-43, "DTC Index"

.

NO

>> GO TO 6.

6.

CHECK ICC WARNING CHIME CIRCUIT

Check meter buzzer. Refer to 

WCS-40, "Component Function Check"

. 

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> GO TO 7.

7.

REPAIR OR REPLACE MALFUNCTIONING PARTS

Repair or replace malfunctioning parts.

DAS-204

< SYMPTOM DIAGNOSIS >

[DCA]

CHIME DOES NOT SOUND

>> GO TO 9.

8.

REPLACE ADAS CONTROL UNIT

Replace the ADAS control unit. Refer to 

DAS-63, "Removal and Installation"

. 

>> GO TO 9.

9.

CHECK DCA SYSTEM

1.

Erase “self-diagnosis result”, and then perform “All DTC Reading” again after performing the action test.
(Refer to 

DAS-128, "Description"

 for action test.)

2.

Check if the DCA system is normal. 

>> INSPECTION END