Diagnostic Procedure

WARNING: This page is about a different car, the 2003 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

CHECK TRANSFER MOTOR AND TRANSFER MOTOR RELAY

Fig 1: Checking Transfer Motor And Transfer Motor Relay
Courtesy of NISSAN MOTOR CO., U.S.A.

Refer to "Transfer Motor" and "TRANSFER MOTOR RELAY ", "COMPONENT INSPECTION".

OK or NG
1. OK: GO TO 2.
2. NG: Repair or replace transfer motor and transfer motor relay.
CHECK CONTINUITY
Check the following.
- Continuity of transfer sub-harness
  Refer to "TRANSFER SWITCH ASSEMBLY SUB-HARNESS CONNECTOR ", "COMPONENT INSPECTION".
OK or NG
1. OK: GO TO 3.
2. NG: Repair or replace transfer sub-harness.
CHECK INPUT SIGNAL
With CONSULT-II
1. Select "MAIN SIGNALS" in Data Monitor.
2. Read out ON/OFF status of "MOTOR RELAY".
  
  Fig 2: Checking Input Signal With CONSULT-II
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. When the value is different from standard value although ON/OFF switching occurs, check the following items.
  - PNP switch, throttle position sensor and closed throttle position switch circuits
    Refer to "DTC P0705: PARK/NEUTRAL POSITION SWITCH " and "DTC P1705: ACCELERATOR PEDAL POSITION SENSOR ".
OK or NG
1. OK: GO TO 4.
2. NG:
  1. Perform transfer control unit input/output signal inspection. Refer to "TRANSFER CONTROL UNIT INSPECTION TABLE ", "TROUBLE DIAGNOSIS - GENERAL DESCRIPTION".
  2. If NG, recheck transfer control unit pin terminals for damage or loose connection with harness connector.
CHECK TRANSFER MOTOR RELAY POWER SOURCE
1. Disconnect transfer motor relay harness connector.
2. Turn ignition switch to "ON" position.
3. Check voltage between transfer motor relay harness connector terminals 1, 3 and body ground.
  Voltage: Battery voltage
  
  Fig 3: Checking Transfer Motor Relay Power Source
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 5.
2. NG: Check the following.
  - No. 55 fuse (20A)
  - No. 8 fuse (10A)
  - Harness continuity between fuse and transfer motor relay
CHECK HARNESS CONTINUITY
1. Turn ignition switch to "OFF" position.
2. Check continuity between the following terminals.
  - Transfer control unit 41 and Transfer motor 14
  - Transfer control unit 41 and Transfer motor relay 2
  - Transfer control unit 14 and Transfer motor relay 4
  - Transfer motor 15 and body ground
    Continuity should exist.
    
    Fig 4: Checking Harness Continuity
    Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 6.
2. NG: Repair or replace harness or connector.
PERFORM SELF-DIAGNOSIS AGAIN
After driving for a while, perform self-diagnosis again.

Refer to "TROUBLE DIAGNOSIS WITHOUT CONSULT-II " and "TROUBLE DIAGNOSIS WITH CONSULT-II " .

OK or NG
1. OK: INSPECTION END
2. NG:
  1. Perform transfer control unit input/output signal inspection. Refer to "TRANSFER CONTROL UNIT INSPECTION TABLE ", "TROUBLE DIAGNOSIS - GENERAL DESCRIPTION".
  2. If NG, recheck transfer control unit pin terminals for damage or loose connection with harness connector.