Diagnostic Procedure

Refer to 2-4WD SHIFT SOLENOID VALVE AND TRANSFER FLUID TEMPERATURE SENSOR  under COMPONENT INSPECTION.

OK or NG 

1. OK: GO TO  2.
2. NG Repair or replace fluid temperature sensor.

Check the following:

• Continuity of transfer sub-harness

  Refer to TRANSFER TERMINAL CORD ASSEMBLY SUB-HARNESS CONNECTOR  under COMPONENT INSPECTION .

OK or NG 

1. OK: GO TO  3.
2. NG Repair or replace transfer sub-harness.

1. WITH CONSULT-II GO TO  4.
2. WITHOUT CONSULT-II GO TO  5.

Fig 1: Input Signal Of Transfer Fluid Temperature Sensor

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

With CONSULT-II 

1. Start engine.
2. Select ECU INPUT SIGNLAS in Data Monitor.
3. Read out the value of FLUID TEMP SE.

   Voltage  :

   1. 20°C (68°F): Approx. 1.5V 
   2. 80°C (176°F): Approx. 0.5V 
   Fig 2: Checking Input Signal With CONSULT-II Transfer Fluid Temperature Sensor

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

OK or NG 

1. OK: GO TO  6.
2. NG Check the following. 
   • Continuity between transfer control unit and transfer terminal cord assembly sub-harness connector

Without CONSULT-II 

1. Turn ignition switch to ON position.
2. Check voltage between transfer control unit harness connector terminals 28 and 31.

   Voltage  :

   1. 20°C (68°F): Approx. 1.5V 
   2. 80°C (176°F): Approx. 0.5V 
   Fig 3: Checking Voltage Between Transfer Control Unit Harness Connector Terminals

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

OK or NG 

1. OK: GO TO  6.
2. NG Check the following  :
   • Continuity between transfer control unit and transfer terminal cord assembly sub-harness connector

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  under TROUBLE DIAGNOSIS - GENERAL DESCRIPTION.
   2. If NG, recheck transfer control unit pin terminals for damage or loose connection with harness connector.