Infiniti QX56 (Z62). Manual - part 329

DAS

C1A06 OPERATION SW

DAS-353

< DTC/CIRCUIT DIAGNOSIS >

[LDW & LDP]

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C1A06 OPERATION SW

DTC Logic

INFOID:0000000006228192

DTC DETECTION LOGIC

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

DAS-374,

"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 LDP 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-353, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-40, "Intermittent Incident"

. 

Diagnosis Procedure

INFOID:0000000006228193

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-374, "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-354, "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-354

< DTC/CIRCUIT DIAGNOSIS >

[LDW & LDP]

C1A06 OPERATION SW

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:0000000006228194

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

C1A14 ECM

DAS-355

< DTC/CIRCUIT DIAGNOSIS >

[LDW & LDP]

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C1A14 ECM

DTC Logic

INFOID:0000000006228195

DTC DETECTION LOGIC

NOTE:
If DTC “C1A14” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to 

DAS-374,

"ADAS CONTROL UNIT : DTC Logic"

. 

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine.

2.

Operate the ICC system and drive. 

CAUTION:

Always drive safely. 

3.

Stop the vehicle.

4.

Perform “All DTC Reading” with CONSULT-III. 

5.

Check if the “C1A14” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS”. 

Is “C1A14” detected as the current malfunction?

YES

>> Refer to 

DAS-355, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-40, "Intermittent Incident"

. 

Diagnosis Procedure

INFOID:0000000006228196

1.

CHECK SELF-DIAGNOSIS RESULTS

Check if “U1000” is detected other than “C1A14” 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-374, "ADAS CONTROL UNIT : DTC Logic"

. 

NO

>> GO TO 2.

2.

PERFORM SELF-DIAGNOSIS OF ECM

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

Is any DTC detected?

YES

>> Perform 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"

. 

DTC

(On board dis-

play)

Trouble diagnosis name

DTC detecting condition

Possible causes

C1A14

(14)

ECM CIRCUIT

If ECM is malfunctioning

• Accelerator pedal position sensor
• ECM
• ADAS control unit

DAS-356

< DTC/CIRCUIT DIAGNOSIS >

[LDW & LDP]

C1A15 GEAR POSITION

C1A15 GEAR POSITION

Description

INFOID:0000000006228197

ADAS control unit judges the gear position based on the following signals. 
• Current gear position signal transmitted from TCM via CAN communication. 
• Value of gear ratio calculated from input speed signal transmitted from TCM via CAN communication.
• Value of gear ratio calculated from the vehicle speed signal transmitted from ABS actuator and electric unit

(control unit) via CAN communication. 

DTC Logic

INFOID:0000000006228198

DTC DETECTION LOGIC

NOTE:
If DTC “C1A15” is detected along with DTC “U1000”, “C1A03”, or “C1A04”, first diagnose the DTC “U1000”,
“C1A03”, or “C1A04”. 
• Refer to 

DAS-374, "ADAS CONTROL UNIT : DTC Logic"

 for DTC “U1000”.

• Refer to 

DAS-347, "DTC Logic"

 for DTC “C1A03”.

• Refer to 

DAS-348, "DTC Logic"

 for DTC “C1A04”.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine.

2.

Turn the LDP system ON. 

3.

Drive the vehicle at 10 km/h (6 MPH) or faster for approximately 15 minutes or more. 

CAUTION:

Always drive safely. 

4.

Stop the vehicle.

5.

Perform “All DTC Reading” with CONSULT-III. 

6.

Check if “C1A15” is detected as the current malfunction in the “Self Diagnostic Result” of “ICC/ADAS”. 

Is “C1A15” detected as the current malfunction?

YES

>> Refer to 

DAS-356, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-40, "Intermittent Incident"

. 

Diagnosis Procedure

INFOID:0000000006228199

1.

CHECK SELF-DIAGNOSIS RESULTS

Check if “C1A03”, “C1A04”, or “U1000” is detected other than “C1A15” in “Self Diagnostic Result” of “ICC/
ADAS”. 

Is any DTC detected?

YES

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

DAS-310, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK VEHICLE SPEED SIGNAL

Check that “VHCL SPEED SE” operates normally in “DATA MONITOR” of “ICC/ADAS”. 

CAUTION:

Be careful of the vehicle speed. 

Is the inspection result normal?

DTC

(On board dis-

play)

Trouble diagnosis 

name

DTC detecting condition

Possible causes

C1A15

(15)

GEAR POSITION

A mismatch between an current gear posi-
tion signal transmitted from TCM via CAN 
communication and a gear position calculat-
ed by the ADAS control unit continues for 
approximately 11 minutes or more

• Input speed sensor
• Vehicle speed sensor A/T (output speed 

sensor)

• TCM