Diagnostic Procedure

Shift actuator position switch .
Refer to ACTUATOR POSITION SWITCH under COMPONENT INSPECTION.

OK or NG
1. OK: GO TO 3.
2. NG: GO TO 2.
Check position switch .
1. Recheck continuity of shift actuator position switch.
  Refer to ACTUATOR & ACTUATOR POSITION SWITCH under COMPONENT INSPECTION.
  
  Continuity should exist.
OK or NG
1. OK: GO TO 3.
2. NG: Repair or replace position switch.
Check input signal .
1. WITH CONSULT-II GO TO 4.
2. WITHOUT CONSULT-II GO TO 5.
Check input signal .
With CONSULT-II
1. Start engine (idling).
2. Select SELF-DIAG RESULTS in Select Diag Mode.
3. Read out self-diagnostic result
  
  Fig 1: Checking Transfer Control Device
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 2: Displaying SELF DIAG RESULTS Screen
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 7.
2. NG: GO TO 6.
Check input signal .
Without CONSULT-II
1. Start engine (idling).
2. Check voltage transfer control unit harness connector terminal 27 (or 44) and body ground while 4WD shift switch is set from 4H to 4LO to 4H).
  
  Fig 3: Checking Voltage Transfer Control Unit Harness Connector Terminal & Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Result
  
  Fig 4: Displaying Voltage Condition Result Table
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 7.
2. NG: GO TO 6.
Check harness continuity between transfer control unit and transfer control device .
OK or NG
1. OK: GO TO 7.
2. NG Repair and replace harness connector between transfer control unit and transfer control device.
Perform self-diagnosis again .
After driving for a while, perform self-diagnosis again.

Refer to TROUBLE DIAGNOSIS WITHOUT CONSULT-II .

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