Nissan Qashqai J11. Manual - part 801

DLN-120

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TY30A]

P1804 CONTROL MODULE

P1804 CONTROL MODULE

DTC Logic

INFOID:0000000010288288

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION

With CONSULT

1.

Turn the ignition switch OFF to ON.

2.

Perform self-diagnosis for “ALL MODE AWD/4WD”.

Is DTC “P1804” detected?

YES

>> Proceed to 

DLN-120, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010288289

1.

PERFORM SELF-DIAGNOSIS AGAIN

With CONSULT

Perform “DTC CONFIRMATION PROCEDURE” (self-diagnosis) again. Refer to 

DLN-120, "DTC Logic"

.

Is DTC “P1804” detected?

YES

>> Replace AWD control module. Refer to 

DLN-153, "Exploded View"

.

NO

>> Check AWD control module pin terminals for damage or loose connection with harness connector.

If any items are damaged, repair or replace error-detected parts.

DTC

Display item

Malfunction detected condition

Possible cause

P1804

CONTROL UNIT 3

Malfunction is detected in the memory 
(EEOROM) system of AWD control 
module.

Internal malfunction of AWD control 
module.

P181F INCOMPLETE CALIBRATION

DLN-121

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TY30A]

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P181F INCOMPLETE CALIBRATION

DTC Logic

INFOID:0000000010288290

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION

 With CONSULT

1.

Turn the ignition switch OFF to ON.

2.

Perform self-diagnosis for “ALL MODE AWD/4WD”.

Is DTC “P181F” detected?

YES

>> Proceed to 

DLN-121, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010288291

1.

PERFORM WRITING UNIT CHARACTERISTICS

1.

Erase self-diagnostic result for “ALL MODE AWD/4WD”.

2.

Perform writing unit characteristics. Refer to 

DLN-109, "CONSULT Function"

.

3.

Perform self-diagnosis for “ALL MODE AWD/4WD”.

Is any DTC except “P181F” detected?

YES

>> Perform trouble diagnosis for detected DTC. Refer to 

DLN-141, "DTC Index"

.

NO

>> GO TO 2.

2.

PERFORM SELF-DIAGNOSIS AGAIN

With CONSULT

Perform “DTC CONFIRMATION PROCEDURE” (self-diagnosis) again. Refer to 

DLN-121, "DTC Logic"

.

Is DTC “P181F” detected?

YES

>> Replace AWD control module. Refer to 

DLN-153, "Exploded View"

.

NO

>> Check AWD control module pin terminals for damage or loose connection with harness connector.

If any items are damaged, repair or replace error-detected parts.

DTC

Display item

Malfunction detected condition

Possible cause

P181F

INCOMP CALIBRATION

When incomplete writing unit character-
istics of rear final drive is detected.

Writing unit characteristics is incom-
plete.

DLN-122

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TY30A]

U1000 CAN COMM CIRCUIT

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000010288292

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.

DTC Logic

INFOID:0000000010288293

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC REPRODUCTION PROCEDURE

With CONSULT

1.

Turn the ignition switch OFF to ON.

2.

Perform AWD control unit self-diagnosis.

Is DTC “U1000” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

DLN-122, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010288294

1.

PERFORM SELF-DIAGNOSIS

With CONSULT

Perform AWD control unit self-diagnosis.
Is DTC “U1000” detected?

YES

>> CAN specification chart. Refer to 

LAN-24, "Trouble Diagnosis Flow Chart"

.

NO

>> INSPECTION END

DTC

Items

(CONSULT screen terms)

Diagnostic item is detected when...

Possible cause

U1000

CAN COMM CIRCUIT

When AWD control unit is not transmit-
ting or receiving CAN communication 
signal for 2 seconds or more.

• CAN communication error
• Malfunction of AWD control unit

U1010 CONTROL UNIT (CAN)

DLN-123

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TY30A]

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U1010 CONTROL UNIT (CAN)

Description

INFOID:0000000010288295

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.

DTC Logic

INFOID:0000000010288296

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC REPRODUCTION PROCEDURE

With CONSULT

1.

Turn the ignition switch OFF to ON.

2.

Perform AWD control unit self-diagnosis.

Is DTC “U1010” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

DLN-123, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010288297

1.

CHECK AWD CONTROL UNIT

Check AWD control unit harness connector for disconnection and deformation.
Is the inspection result normal? 

YES

>> Replace AWD control unit. Refer to 

DLN-153, "Exploded View"

.

NO

>> Repair or replace damaged parts.

DTC

Items

(CONSULT screen terms)

Diagnostic item is detected when...

Possible cause

U1010

CONTROL UNIT (CAN)

When detecting error during the initial di-
agnosis of CAN controller of AWDAWD 
control unit.

Malfunction of AWD control unit