Nissan Rogue. Manual - part 400

DLN-44

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TY21C]

P1804 AWD CONTROL UNIT

P1804 AWD CONTROL UNIT

DTC Description

INFOID:0000000011278328

DTC DETECTION LOGIC

POSSIBLE CAUSE

Internal malfunction of AWD control unit.

FAIL-SAFE

AWD control changes to front-wheel drive immediately, then AWD control stops, and the vehicle becomes

front-wheel drive.

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.

DTC REPRODUCTION PROCEDURE

 With CONSULT

1. Turn the ignition switch ON.

2. Perform “Self Diagnostic Result” of “ALL MODE AWD/4WD”.
Is DTC “P1804” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

DLN-44, "Diagnosis Procedure"

.

NO-1 >> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2 >> Confirmation after repair: Inspection End.

Diagnosis Procedure

INFOID:0000000011278329

1.

PERFORM SELF DIAGNOSTIC RESULT

 With CONSULT

 After erasing the DTC, perform DTC confirmation procedure again. Refer to 

DLN-44, "DTC Descrip-

tion"

Is DTC P1804 detected?

YES

>> Replace AWD control unit. Refer 

DLN-68, "Removal and Installation"

.

NO

>> Check AWD control unit pin terminals for damage or loose connection with harness connection

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

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P1804

CONTROL UNIT
(Control unit)

Malfunction is detected in the memory (EEPROM) system of 
AWD control unit.

P1808 WHEEL SPEED SENSOR

DLN-45

< DTC/CIRCUIT DIAGNOSIS >

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P1808 WHEEL SPEED SENSOR

DTC Description

INFOID:0000000011278330

DTC DETECTION LOGIC

POSSIBLE CAUSE

• ABS malfunction

• Internal malfunction of AWD control unit

FAIL-SAFE

AWD control changes to front-wheel drive gradually (rear-wheels still have some driving torque), then AWD

control stops, and the vehicle becomes front-wheel drive.

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.

DTC REPRODUCTION PROCEDURE

 With CONSULT

1. Turn the ignition switch ON.

2. Perform “ Self Diagnostic Result” of “ALL MODE AWD/4WD”.
Is DTC “P1808” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

DLN-45, "Diagnosis Procedure"

.

NO-1 >> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2 >> Confirmation after repair: Inspection End.

Diagnosis Procedure

INFOID:0000000011278331

1.

PERFORM ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF DIAGNOSTIC RESULT

 With CONSULT

Perform “Self Diagnostic Result” of “ABS”.
Is any DTC detected?

YES

>> Check the DTC. Refer to 

BRC-53, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK TERMINALS AND HARNESS CONNECTORS

Check AWD control unit pin terminals for damage or loose connection with harness connector.
Is inspection result normal?

YES

>> After turning the ignition switch OFF, perform DTC confirmation procedure again. If DTC “P1808”

is detected, Replace AWD control unit. Refer to 

DLN-68, "Removal and Installation"

.

NO

>> Repair or replace error-detected parts.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P1808

VHCL SPEED SEN-ABS
(Vehicle speed sensor-ABS)

• Malfunction is detected in vehicle speed signal that is out-

put from ABS actuator and electric unit (control unit) 
through CAN communication.

• Improper signal is input while driving.

DLN-46

< DTC/CIRCUIT DIAGNOSIS >

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P1809 AWD CONTROL UNIT

P1809 AWD CONTROL UNIT

DTC Description

INFOID:0000000011278332

DTC DETECTION LOGIC

POSSIBLE CAUSE

Internal malfunction of AWD control unit

FAIL-SAFE

AWD control changes to front-wheel drive immediately, then AWD control stops, and the vehicle becomes

front-wheel drive.

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.

DTC REPRODUCTION PROCEDURE

 With CONSULT

1. Turn the ignition switch ON.

2. Perform “Self Diagnostic Result” of “ALL MODE AWD/4WD”.
Is DTC “P1809” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

DLN-46, "Diagnosis Procedure"

.

NO-1 >> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2 >> Confirmation after repair: Inspection End.

Diagnosis Procedure

INFOID:0000000011278333

1.

PERFORM SELF DIAGNOSTIC RESULT 

With CONSULT

 After the DTC, perform DTC confirmation procedure again. Refer to 

DLN-46, "DTC Description"

.

Is DTC P1809 detected?

YES

>> Replace AWD control unit. Refer 

DLN-68, "Removal and Installation"

.

NO

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

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

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P1809

CONTROL UNIT
(Control unit)

AD converter system of AWD control unit is malfunctioning.

P1811 BATTERY VOLTAGE

DLN-47

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P1811 BATTERY VOLTAGE

DTC Description

INFOID:0000000011278334

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Malfunction of AWD control unit power supply circuit (open or short)

• Battery power supply

• Ignition power supply

• Internal malfunction of AWD control unit

FAIL-SAFE

AWD control changes to front-wheel drive immediately, then AWD control stops, and the vehicle becomes

front-wheel drive.

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.

DTC REPRODUCTION PROCEDURE

 With CONSULT

1. Turn the ignition switch ON.

2. Drive the vehicle for a while.

3. Stop the vehicle.

4. Perform “Self Diagnostic Result” of “ALL MODE AWD/4WD”.
Is DTC “P1811” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

DLN-47, "Diagnosis Procedure"

.

NO-1 >> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2 >> Confirmation after repair: Inspection End.

Diagnosis Procedure

INFOID:0000000011278335

1.

CHECK AWD CONTROL UNIT POWER SUPPLY (1)

1. Turn the ignition switch OFF.

2. Disconnect AWD control unit harness connector.

3. Check the voltage between AWD control unit harness connector and ground.

4. Turn the ignition switch ON.

CAUTION:

Never start the engine.

5. Check the voltage between AWD control unit harness connector and ground.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P1811

BATTERY VOLTAGE
(Battery voltage)

When engine is running and AWD control unit power supply 
is less than 9 V or higher than 16 V.

AWD control unit

—

Voltage (Approx.)

Connector

Terminal

B75

7

Ground

0 V