Diagnostic Procedure

Refer to FRONT REVOLUTION SENSOR  under COMPONENT INSPECTION.

OK or NG 

1. OK: GO TO  3.
2. NG: GO TO  2.

Check the following.

• Continuity of transfer sub-harness

  Refer to TRANSFER SUB-HARNESS  under COMPONENT INSPECTION.

OK or NG 

1. OK: Repair or replace front revolution sensor.
2. NG: Repair or replace front revolution sensor and transfer sub-harness.

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

With CONSULT-II 

1. Start engine.
2. Select ECU INPUT SIGNALS in Data Monitor.
3. Read out the value of VEHICLE SPEED SENSOR (FRONT) while driving.
   Fig 1: Displaying Front Revolution Sensor

   Courtesy of NISSAN MOTOR CO., U.S.A.
   Fig 2: Identifying DATA MONITOR Display Screen

   Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check if the value changes according to accelerating and decelerating the vehicle.

OK or NG 

1. OK: GO TO  6.
2. NG: GO TO  7.

Without CONSULT-II 

1. Start engine.
2. Check voltage between transfer control unit harness connector terminals 38 and 28.

   Measure it in AC range.

   Voltage: 

   1. 0 km/h (0 MPH): 0V 
   2. 30 km/h (19 MPH): More than 1V 

   Voltage rises gradually in response to vehicle speed. 

   Fig 3: Checking Input Signal Without CONSULT-II

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

OK or NG 

1. OK: GO TO  6.
2. NG: GO TO  7.

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.

OK or NG 

1. OK: GO TO  6.
2. NG: Repair or replace sub-harness connector between transfer control unit and front revolution sensor.