Infiniti QX56 (Z62). Manual - part 206

 

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Infiniti QX56 (Z62). Manual - part 206

 

 

CCS

C1A05 BRAKE SW/STOP LAMP SW

CCS-91

< DTC/CIRCUIT DIAGNOSIS >

[ICC]

C

D

E

F

G

H

I

J

K

L

M

B

N

P

A

YES

>> GO TO 6.

NO

>> Replace ICC brake switch.

6.

CHECK ICC BRAKE SWITCH POWER SUPPLY CIRCUIT

1.

Turn the ignition switch ON.

2.

Check voltage between ICC brake switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair the harnesses or connectors.

7.

CHECK HARNESS BETWEEN ICC BRAKE SWITCH AND ECM

1.

Turn ignition switch OFF

2.

Disconnect ECM connector.

3.

Check for continuity between ICC brake switch harness connector and ECM harness connector. 

4.

Check for continuity between ICC brake switch harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair the harnesses or connectors.

8.

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

>> Replace the ADAS control unit. Refer to 

DAS-63, "Removal and Installation"

.

9.

CHECK STOP LAMP SWITCH INSTALLATION

1.

Turn ignition switch OFF.

2.

Check stop lamp switch for correct installation. Refer to 

BR-7, "Inspection and Adjustment"

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> Adjust stop lamp switch installation. Refer to 

BR-7, "Inspection and Adjustment"

10.

STOP LAMP SWITCH INSPECTION

1.

Disconnect stop lamp switch connector. 

2.

Check stop lamp switch. Refer to 

CCS-93, "Component Inspection (Stop Lamp Switch)"

Is the inspection result normal?

YES

>> GO TO 11.

Terminals

Voltage

(Approx.)

(+)

(-)

ICC brake switch

Ground

Connector

Terminal

E68

1

Battery voltage

ICC brake switch

ECM

Continuity

Connector

Terminal

Connector

Terminal

E68

2

E80

147

Existed

ICC brake switch

Ground

Continuity

Connector

Terminal

E68

2

Not existed

CCS-92

< DTC/CIRCUIT DIAGNOSIS >

[ICC]

C1A05 BRAKE SW/STOP LAMP SW

NO

>> Replace stop lamp switch. 

11.

CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT

1.

Turn the ignition switch ON.

2.

Check voltage between stop lamp switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 12.

NO

>> Repair the harnesses or connectors.

12.

CHECK HARNESS BETWEEN STOP LAMP SWITCH AND ECM

1.

Turn ignition switch OFF

2.

Disconnect ECM, rear combination lamp and high-mounted stop lamp connectors.

3.

Check for continuity between stop lamp switch harness connector and ECM harness connector. 

4.

Check for continuity between stop lamp switch harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 13.

NO

>> Repair the harnesses or connectors.

13.

CHECK HARNESS BETWEEN STOP LAMP SWITCH AND ABS ACTUATOR AND ELECTRIC UNIT

(CONTROL UNIT)

1.

Disconnect ABS actuator and electric unit (control unit) connector.

2.

Check for continuity between stop lamp switch harness connector and ABS actuator and electric unit
(control unit) harness connector. 

3.

Check for continuity between stop lamp switch harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 14.

NO

>> Repair the harnesses or connectors.

Terminals

Voltage

(Approx.)

(+)

(-)

Stop lamp switch

Ground

Connector

Terminal

E115

1

Battery voltage

3

Stop lamp switch

ECM

Continuity

Connector

Terminal

Connector

Terminal

E115

2

E80

158

Existed

Stop lamp switch

Ground

Continuity

Connector

Terminal

E115

2

Not existed

Stop lamp switch

ABS actuator and electric 

unit (control unit)

Continuity

Connector

Terminal

Connector

Terminal

E115

4

E36

17

Existed

Stop lamp switch

Ground

Continuity

Connector

Terminal

E115

4

Not existed

CCS

C1A05 BRAKE SW/STOP LAMP SW

CCS-93

< DTC/CIRCUIT DIAGNOSIS >

[ICC]

C

D

E

F

G

H

I

J

K

L

M

B

N

P

A

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:0000000006224314

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:0000000006224315

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

CCS-94

< DTC/CIRCUIT DIAGNOSIS >

[ICC]

C1A06 OPERATION SW

C1A06 OPERATION SW

DTC Logic

INFOID:0000000006224316

DTC DETECTION LOGIC

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

CCS-145,

"ADAS CONTROL UNIT : DTC Logic"

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine.

2.

Wait for approximately 5 minutes after turning the MAIN switch of ICC 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 

CCS-94, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-40, "Intermittent Incident"

Diagnosis Procedure

INFOID:0000000006224317

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 

CCS-145, "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 

CCS-95, "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

 

 

 

 

 

 

 

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