Nissan Murano. Instruction — part 443
DIAGNOSIS SYSTEM (AWD CONTROL UNIT)
DLN-11
< SYSTEM DESCRIPTION >
[TRANSFER: TY20A]
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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 >
[TRANSFER: TY20A]
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
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
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 >
[TRANSFER: TY20A]
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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
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
.
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 >
[TRANSFER: TY20A]
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
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
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
11
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