Infiniti QX56 (Z62). Manual — part 280

DAS

C1A27 ECD POWER SUPPLY CIRCUIT

DAS-157

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

C

D

E

F

G

H

I

J

K

L

M

B

N

P

A

C1A27 ECD POWER SUPPLY CIRCUIT

DTC Logic

INFOID:0000000006228096

DTC DETECTION LOGIC

NOTE:
If DTC “C1A27” is detected along with DTC “U1000”, “U0415” or “U0121” first diagnose the DTC “U1000”,
“U0415” or “U0121”.
• DTC “U1000”: Refer to

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

.

• DTC “U0415”: Refer to

DAS-180, "DTC Logic"

.

• DTC “U0121”: Refer to

DAS-175, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine.

2.

Wait for approximately 1 minute after turning the DCA system ON.

3.

Perform “All DTC Reading” with CONSULT-III.

4.

Check if the “C1A27” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS”.

Is “C1A27” detected as the current malfunction?

YES

>> Refer to

DAS-157, "Diagnosis Procedure"

.

NO

>> Refer to

GI-40, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000006228097

1.

CHECK SELF-DIAGNOSIS RESULTS

Check if “U1000”, “U0415” or “U0121” is detected other than “C1A27” 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-100, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK POWER SUPPLY CIRCUIT OF ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

Check power supply circuit of ABS actuator and electric unit (control unit). Refer to

BRC-113, "Diagnosis Pro-

cedure"

.

Is the inspection result normal?

YES

>> Perform self-diagnosis of ABS actuator and electric unit (control unit). Refer to

BRC-51, "DTC

Index"

.

NO

>> Repair the harnesses or connectors.

DTC

(On board

display)

Trouble diagnosis name

DTC detecting condition

Possible cause

C1A27

(27)

ECD PWR SUPLY CIR

ECD system power supply voltage is excessively
low

• ABS actuator and electric unit (con-

trol unit) power supply circuit

• ABS actuator and electric unit (con-

trol unit)

DAS-158

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

C1A2A ICC SENSOR POWER SUPPLY CIRCUIT

C1A2A ICC SENSOR POWER SUPPLY CIRCUIT

DTC Logic

INFOID:0000000006228098

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine.

2.

Turn the DCA system ON.

3.

Perform “All DTC Reading” with CONSULT-III.

4.

Check if the “C1A2A” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS”.

Is “C1A2A” detected as the current malfunction?

YES

>> Refer to

DAS-158, "Diagnosis Procedure"

.

NO

>> Refer to

GI-40, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000006228099

1.

CHECK SELF-DIAGNOSIS RESULTS

Check if “U1000” is detected other than “C1A2A” 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-182, "ADAS CONTROL UNIT : DTC Logic"

.

NO

>> GO TO 2.

2.

CHECK ICC SENSOR SELF-DIAGNOSIS

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

Is any DTC detected?

YES

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

CCS-55, "DTC Index"

.

NO

>> Replace ADAS control unit. Refer to

DAS-63, "Removal and Installation"

.

DTC

(On board

display)

Trouble diagnosis name

DTC detecting condition

Possible cause

C1A2A

(80)

ICC SEN PWR SUP CIR

Abnormal power supply voltage in ICC sensor

• Harness, connector, fuse
• ICC sensor

DAS

C1A33 CAN TRANSMISSION ERROR

DAS-159

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

C

D

E

F

G

H

I

J

K

L

M

B

N

P

A

C1A33 CAN TRANSMISSION ERROR

DTC Logic

INFOID:0000000006228100

DTC DETECTION LOGIC

NOTE:
If DTC “C1A33” 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.

Turn the DCA system ON.

3.

Perform “All DTC Reading” with CONSULT-III.

4.

Check if the “C1A33” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS”.

Is “C1A33” detected as the current malfunction?

YES

>> Refer to

DAS-159, "Diagnosis Procedure"

.

NO

>> Refer to

GI-40, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000006228101

1.

CHECK SELF-DIAGNOSIS RESULTS

Check if “U1000” is detected other than “C1A33” 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

>> 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

C1A33

(33)

CAN TRANSMISSION
ERR

If an error occurs in the CAN communication
signal that ADAS control unit transmits to ECM

ADAS control unit

DAS-160

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

C1A34 COMMAND ERROR

C1A34 COMMAND ERROR

DTC Logic

INFOID:0000000006228102

DTC DETECTION LOGIC

NOTE:
If DTC “C1A34” 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.

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 “C1A34” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS”.

Is “C1A34” detected as the current malfunction?

YES

>> Refer to

DAS-160, "Diagnosis Procedure"

.

NO

>> Refer to

GI-40, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000006228103

1.

CHECK SELF-DIAGNOSIS RESULTS

Check if “U1000” is detected other than “C1A34” 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

>> 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

C1A34

(34)

COMMAND ERROR

If an error occurs in the command signal that
ADAS control unit transmits to ECM via CAN
communication

ADAS control unit