Diagnostic Procedure

With CONSULT-II 

1. Start engine.
2. Depress brake pedal and stop vehicle.
3. Set A/T selector lever to "N" position.
4. Select "DATA MONITOR" mode for "ALL MODE AWD/4WD" with CONSULT-II.
Fig 1: CONSULT-II Display - DATA MONITOR
Courtesy of NISSAN MOTOR CO., U.S.A.
5. Read out the value of "SHIFT POS SW1", "SHIFT POS SW2", "SHIFT POS SW3", "SHIFT POS SW4".
   MONITORED ITEM, CONDITION AND DISPLAY VALUE
   
   

   Monitored item	Condition	Display value
   SHIFT POS SW1	4WD shift switch: 2WD and 4LO	ON
   	4WD shift switch: 4H	OFF
   SHIFT POS SW2	4WD shift switch: 4LO	ON
   	4WD shift switch: 2WD and 4H	OFF
   SHIFT POS SW3	4WD shift switch: 2WD and 4H	ON
   	4WD shift switch: 4LO	OFF
   SHIFT POS SW4	4WD shift switch: 4H and 4LO	ON
   	4WD shift switch: 2WD	OFF

Without CONSULT-II 

1. Start engine.
2. Depress brake pedal and stop vehicle.
3. Set A/T selector lever to "N" position.
4. Check voltage between transfer control unit harness connector terminal and ground.
   Fig 2: Checking Voltage Between Transfer Control Unit Harness Connector Terminal And Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.
   TERMINALS VOLTAGE REFERENCE
   
   

   Connector	Terminal	Condition	Voltage (Approx.)
   E142	10 - Ground	4WD shift switch: 2WD and 4LO	0V
   		4WD shift switch: 4H	Battery voltage
   	11 - Ground	4WD shift switch: 4LO	0V
   		4WD shift switch: 2WD and 4H	Battery voltage
   	12 - Ground	4WD shift switch: 2WD and 4H	0V
   		4WD shift switch: 4LO	Battery voltage
   	13 - Ground	4WD shift switch: 4H and 4LO	0V
   		4WD shift switch: 2WD	Battery voltage

OK or NG 

OK: GO TO  4.

NG: GO TO 2.

1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector and the transfer control device (actuator position switch) harness connector.
3. Check continuity between the following terminals.
   • Transfer control unit harness connector E142 terminal 10 and transfer control device (actuator position switch) harness connector F58 terminal 26.
   • Transfer control unit harness connector E142 terminal 11 and transfer control device (actuator position switch) harness connector F58 terminal 20.
   • Transfer control unit harness connector E142 terminal 12 and transfer control device (actuator position switch) harness connector F58 terminal 21.
   • Transfer control unit harness connector E142 terminal 13 and transfer control device (actuator position switch) harness connector F58 terminal 25.

     Continuity should exist. 

     Fig 3: Checking Continuity Between Transfer Control Unit Harness Connector E142 Terminals And Transfer Control Device Harness Connector F58 Terminals

     Courtesy of NISSAN MOTOR CO., U.S.A.

     Also check harness for short to ground and short to power.

OK or NG 

OK: GO TO 3.

NG: Repair or replace damaged parts.

1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Check continuity between transfer control device (actuator position switch) harness connector F58 terminal 22 and ground.

   Continuity should exist. 

   Fig 4: Checking Continuity Between Transfer Control Device Harness Connector F58 Terminal 22 And Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.

   Also check harness for short to power.

OK or NG 

OK: GO TO 4.

NG: Repair open circuit or short to power in harness or connectors.

Check transfer control unit input/output signal. Refer to "TRANSFER CONTROL UNIT INPUT/OUTPUT SIGNAL REFERENCE VALUES ".

OK or NG 

OK: GO TO 5.

NG: Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.

Perform the self-diagnosis, after driving a vehicle for a while.

OK or NG 

OK: Inspection End.

NG: Replace transfer control device. Refer to "TRANSFER CONTROL DEVICE ".