Nissan Murano. Manual - part 443

DIAGNOSIS SYSTEM (AWD CONTROL UNIT)

DLN-11

< SYSTEM DESCRIPTION >

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ACTIVE TEST

Description

Use this mode to determine and identify the details of a malfunction based on self-diagnostic results or data
monitor. AWD control unit gives drive signal to actuator with receiving command from CONSULT to check
operation of actuator.

Test Item

CAUTION:

Never energize continuously for a long time.

Test item

Condition

Description

ETS S/V
(Detects AWD solenoid)

• Vehicle stopped
• Engine running
• No DTC detected

Change command current value to AWD solenoid, and then change driving 
mode. (Monitor value is normal if it is within approx. 

±

10% of command val-

ue.)
• Qu: Increase current value in increments of 0.2 A
• Qd: Decrease current value in increments of 0.2 A
• UP: Increase current value in increments of 0.02 A
• DOWN: Decrease current value in increments of 0.02 A

DLN-12

< DTC/CIRCUIT DIAGNOSIS >

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C1201 AWD CONTROL UNIT

DTC/CIRCUIT DIAGNOSIS

C1201 AWD CONTROL UNIT

Description

INFOID:0000000009718078

• Controls driving force distribution by signals from each sensor from front wheel driving mode (100:0) to 4-

wheel driving mode (50:50).

• Front wheel driving conditions is available by fail-safe function if malfunction is detected in AWD system.

DTC Logic

INFOID:0000000009718079

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC REPRODUCTION PROCEDURE

With CONSULT

1.

Turn the ignition switch OFF to ON.

2.

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

Is DTC “C1201” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

DLN-12, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009718080

1.

PERFORM SELF-DIAGNOSIS

With CONSULT

1.

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

2.

Turn the ignition switch OFF, and then wait 10 seconds or more.

3.

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

Is DTC “C1201” detected?

YES

>> Replace AWD control unit. Refer to 

DLN-53, "Exploded View"

.

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

Display item

Malfunction detected condition

Possible cause

C1201

CONTROLLER FAILURE

Malfunction has occurred inside AWD 
control unit.

Internal malfunction of AWD control unit

C1203 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

DLN-13

< DTC/CIRCUIT DIAGNOSIS >

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C1203 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

Description

INFOID:0000000009718081

• Transmits the following signals via CAN communication to AWD control unit.
- Vehicle speed signal
- Stop lamp switch signal (brake signal)
- Yaw rate sensor signal
- Side G sensor signal
- Decel G sensor signal

DTC Logic

INFOID:0000000009718082

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC REPRODUCTION PROCEDURE

With CONSULT

1.

Start the engine and drive at 30 km/h (19 MPH) or more for approximately 1 minute.

2.

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

Is DTC “C1203” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

DLN-13, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009718083

1.

PERFORM ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS

With CONSULT

Perform self-diagnosis for “ABS”.

Is any DTC detected?

YES

>> Check the DTC.

NO

>> GO TO 2.

2.

PERFORM SELF-DIAGNOSIS

With CONSULT

1.

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

2.

Start the engine and drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute.

3.

Check that ABS warning lamp turns OFF.

4.

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

Is DTC “C1203” detected?

YES

>>  Replace AWD control unit. Refer to 

DLN-53, "Exploded View"

. 

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

Display item

Malfunction detected condition

Possible cause

C1203

ABS SYSTEM

Malfunction related to wheel sensor has 
been detected by ABS actuator and 
electric unit (control unit).

ABS malfunction
• Vehicle speed signal error

DLN-14

< DTC/CIRCUIT DIAGNOSIS >

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C1204 AWD SOLENOID

C1204 AWD SOLENOID

Description

INFOID:0000000009718084

Controls electric controlled coupling by command current from AWD control unit.

DTC Logic

INFOID:0000000009718085

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC REPRODUCTION PROCEDURE

With CONSULT

1.

Turn the ignition switch OFF to ON.

2.

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

Is DTC “C1204” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

DLN-14, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009718086

1.

CHECK AWD SOLENOID POWER SUPPLY

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.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Perform the trouble diagnosis for power supply circuit. Refer to 

DLN-21, "Diagnosis Procedure"

.

2.

CHECK AWD SOLENOID GROUND

Check the continuity between AWD control unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace error-detected parts.

3.

CHECK AWD SOLENOID CIRCUIT

1.

Check the continuity between AWD control unit harness connector and AWD solenoid harness connector.

DTC

Display item

Malfunction detected condition

Possible cause

C1204

4WD SOLENOID

Malfunction related to AWD solenoid has 
been detected.

• Internal malfunction of electronic con-

trolled coupling

• Malfunction of AWD solenoid power 

supply circuit (open or short)

• Malfunction of AWD solenoid com-

mand current

AWD control unit

—

Voltage

Connector

Terminal

M69

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Ground

Battery voltage

AWD control unit

—

Continuity

Connector

Terminal

M69

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Ground

Existed

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