Diagnostic Procedure

CHECK TRANSFER FLUID TEMPERATURE SENSOR
Refer to 2-4WD SHIFT SOLENOID VALVE AND TRANSFER FLUID TEMPERATURE SENSOR .

OK or NG
1. OK: GO TO 2.
2. NG: Repair or replace fluid temperature sensor.
CHECK INPUT SIGNAL
Do you have CONSULT-II?

Yes or No
1. Yes: GO TO 3.
2. No: GO TO 4.
CHECK INPUT SIGNAL
With CONSULT-II
1. Start engine.
2. Select "ECU INPUT SIGNALS" in Data Monitor.
3. Read out the value of "FLUID TEMP SE".
  
  Fig 1: Checking Input Signal
  Courtesy of NISSAN MOTOR CO., U.S.A.
Voltage

20°C (68°F) :Approx. 1.1V

80°C (176°F) :Approx. 0.3V

OK or NG
1. OK: GO TO 5.
2. NG: Check the following.
  - Continuity between transfer control unit and transfer terminal cord assembly harness connector
CHECK INPUT SIGNAL
Without CONSULT-II
1. Turn ignition switch to ON position.
2. Check voltage between transfer control unit harness connector E143 terminals 28 (B/G) and 31 (G).
Voltage

20°C (68°F) :Approx. 1.1V

80°C (176°F) :Approx. 0.3V

OK or NG
1. OK: GO TO 5.
2. NG: Check the following.
  1. Continuity between transfer control unit and transfer terminal cord assembly harness connector
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 input/output signal inspection. Refer to TRANSFER CONTROL UNIT INSPECTION TABLE .
  2. If NG, recheck transfer control unit pin terminals for damage or loose connection with harness connector.