Diagnostic Procedure

With CONSULT-II 

1. Start engine.
2. Select "DATA MONITOR" mode for "ALL MODE AWD/4WD" with CONSULT-II.
3. Read out ON/OFF switching action of "LINE PRES SW" while operating 4WD shift switch.
   Fig 1: Checking Line Pressure Switch Signal

   Courtesy of NISSAN MOTOR CO., U.S.A.
   Fig 2: Identifying "LINE PRES SW"

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

Without CONSULT-II 

1. Start engine.
2. Check voltage between transfer control unit harness connector terminals and ground.
   Fig 3: Transfer Control Unit Harness Connector Terminals And Ground Voltage Specifications

   Courtesy of NISSAN MOTOR CO., U.S.A.
   Fig 4: Checking Voltage Between Transfer Control Unit Harness Connector Terminals And Ground

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

OK or NG 

1. OK: GO TO 5.
2. 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 terminal cord assembly harness connector.
3. Check continuity between transfer control unit harness connector E143 terminal 35 (BR/W) and transfer terminal cord assembly harness connector F56 terminal 1 (BR/W).
   1. Continuity should exist. 

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

OK or NG 

1. OK: GO TO 3.
2. NG: Repair or replace damaged parts.

Fig 5: Checking Continuity Between Transfer Control Unit Harness Connector E143 Terminal 35 And Transfer Terminal Cord Assembly Harness Connector F56 Terminal 1

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

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

OK or NG 

1. OK: GO TO 4.
2. NG: Check the following. If any items are damaged, repair or replace damaged parts.
   • Transfer control unit pin terminals for damage or loose connection with harness connector.
   • Transfer control unit. Refer to "REMOVAL AND INSTALLATION ".

1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Remove line pressure switch. Refer to "LOCATION OF ELECTRICAL PARTS ".
3. Push and release line pressure switch and check continuity between transfer terminal cord assembly terminal 1 and ground.
   Fig 6: Transfer Terminal Cord Assembly Terminal 1 And Ground Continuity Specifications

   Courtesy of NISSAN MOTOR CO., U.S.A.
   Fig 7: Checking Continuity Between Transfer Terminal Cord Assembly Terminal 1 And Ground

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

OK or NG 

1. OK: GO TO 5.
2. NG: Replace line pressure switch. Refer to "LOCATION OF ELECTRICAL PARTS ".

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

OK or NG 

1. OK: GO TO 6.
2. NG: Replace transfer control unit. Refer to "REMOVAL AND INSTALLATION ".

Perform cruise test. Refer to "CRUISE TEST ".

OK or NG 

1. OK: INSPECTION END.
2. NG: Perform the applicable trouble diagnosis.