Infiniti QX56 (Z62). Manual - part 275

DAS

C1A05 BRAKE SW/STOP LAMP SW

DAS-137

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

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14.

PERFORM SELF-DIAGNOSIS OF ECM

1.

Connect all connectors again if the connectors are disconnected. 

2.

Turn ignition switch ON.

3.

Perform “All DTC Reading”. 

4.

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

EC-98, "DTC Index"

.

Is any DTC detected?

YES

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

NO

>> GO TO 15.

15.

PERFORM SELF-DIAGNOSIS OF ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

Check if any DTC is detected in “Self Diagnostic Result” of “ABS”. Refer to 

BRC-51, "DTC Index"

. 

Is any DTC detected?

YES

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

NO

>> Replace the ADAS control unit. Refer to 

DAS-63, "Removal and Installation"

.

Component Inspection (ICC Brake Switch)

INFOID:0000000006228069

1.

CHECK ICC BRAKE SWITCH

Check for continuity between ICC brake switch terminals. 

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace ICC brake switch. 

Component Inspection (Stop Lamp Switch)

INFOID:0000000006228070

1.

CHECK STOP LAMP SWITCH

Check for continuity between stop lamp switch terminals. 

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace stop lamp switch. 

Terminal

Condition

Continuity

1

2

When brake pedal is depressed

Not exist-

ed

When brake pedal is released

Existed

Terminal

Condition

Continuity

1

2

When brake pedal is depressed

Existed

When brake pedal is released

Not exist-

ed

3

4

When brake pedal is depressed

Existed

When brake pedal is released

Not exist-

ed

DAS-138

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

C1A06 OPERATION SW

C1A06 OPERATION SW

DTC Logic

INFOID:0000000006228071

DTC DETECTION LOGIC

NOTE:
If DTC “C1A06” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to 

DAS-182,

"ADAS CONTROL UNIT : DTC Logic"

. 

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine.

2.

Wait for approximately 10 minutes after turning the DCA system ON. 

3.

Perform “All DTC Reading” with CONSULT-III. 

4.

Check if the “C1A06” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS”. 

Is “C1A06” detected as the current malfunction?

YES

>> Refer to 

DAS-138, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-40, "Intermittent Incident"

. 

Diagnosis Procedure

INFOID:0000000006228072

1.

CHECK SELF-DIAGNOSIS RESULTS

Check if “U1000” is detected other than “C1A06” 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 

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

. 

NO

>> GO TO 2.

2.

CHECK ICC STEERING SWITCH

1.

Turn the ignition switch OFF.

2.

Disconnect the ICC steering switch connector. 

3.

Check the ICC steering switch. Refer to 

DAS-139, "Component Inspection"

. 

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace the steering wheel. 

3.

CHECK HARNESS BETWEEN SPIRAL CABLE AND ECM

1.

Disconnect the ECM connector. 

2.

Check for continuity between the spiral cable harness connector and ECM harness connector. 

3.

Check for continuity between spiral cable harness connector and ground. 

DTC

(On board dis-

play)

Trouble diagnosis 

name

DTC detecting condition

Possible causes

C1A06

(6)

OPERATION SW 
CIRC

• Any switch of the ICC steering switch is de-

tected as “ON” continuously for 60 seconds

• An ON/OFF state judgment of the ICC differs 

between ECM and ADAS control unit, and the 
state continues for 2 seconds or more

• ICC steering switch circuit
• ICC steering switch
• ECM

Spiral cable

ECM

Continuity

Connector

Terminal

Connector

Terminal

M33

25

E80

128

Existed

32

130

DAS

C1A06 OPERATION SW

DAS-139

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

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Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair the harnesses or connectors.

4.

CHECK SPIRAL CABLE

Check for continuity between spiral cable terminals. 

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace the spiral cable. 

5.

PERFORM SELF-DIAGNOSIS OF ECM

1.

Connect the connectors of ICC steering switch and ECM connector. 

2.

Turn the ignition switch ON.

3.

Perform “All DTC Reading”. 

4.

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

Is any DTC detected?

YES

>> Perform self-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"

. 

Component Inspection

INFOID:0000000006228073

1.

CHECK ICC STEERING SWITCH

Check resistance between ICC steering switch terminals. 

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace the steering wheel.

Spiral cable

Ground

Continuity

Connector

Terminal

M33

25

Not existed

32

Spiral cable

Continuity

Terminal

13

25

Existed

16

32

Terminal

Switch operation

Resistance 

[

Ω

]

13

16

When pressing MAIN switch

Approx. 0

When pressing dynamic driver assistance 
switch

Approx. 267

When pressing CANCEL switch

Approx. 615

When pressing DISTANCE switch

Approx. 

1090

When pressing SET/COAST switch

Approx. 

1805

When pressing RESUME/ACCELERATE 
switch

Approx. 

2985

When all switches are not pressed

Approx. 

5415

JSOIA0319GB

DAS-140

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

C1A12 LASER BEAM OFF CENTER

C1A12 LASER BEAM OFF CENTER

DTC Logic

INFOID:0000000006228074

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000006228075

1.

CHECK ICC SENSOR SELF-DIAGNOSIS RESULTS

1.

Perform “All DTC Reading” with CONSULT-III.

2.

Check if the “C1A12” is detected as the current malfunction in “Self Diagnostic Result” of “LASER”.

Is “C1A12” detected?

YES

>> Refer to 

CCS-96, "ICC SENSOR : DTC Logic"

.

NO

>> GO TO 2.

2.

CHECK ADAS CONTROL SELF-DIAGNOSIS RESULTS

Check if the “C1A12” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS”.

Is “C1A12” detected?

YES

>> Replace 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

C1A12

(12)

LASER BEAM OFFCNTR

Laser beam of ICC sensor is off the aiming 
point

Laser beam is off the aiming point