Diagnostic Procedure

With CONSULT-II 

1. Start engine.
2. Select "DATA MONITOR" mode for "ALL MODE AWD/4WD" with CONSULT-II.
3. Read out the value of "WAIT DETCT SWITCH".
   Fig 1: CONSULT-II Display DATA MONITOR

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

   Condition		Display value
   Vehicle stopped Engine running A/T selector lever "N" position Brake pedal depressed	4WD shift switch: 4H and 4LO	ON
   	4WD shift switch: 2WD	OFF

Without CONSULT-II 

1. Start engine.
2. Check voltage between transfer control unit harness connector terminal and ground.
   Fig 2: Checking Voltage Between Transfer Control Unit Harness Connector Terminal And Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.
   VOLTAGE BETWEEN TRANSFER CONTROL UNIT HARNESS CONNECTOR TERMINAL AND GROUND REFERENCE
   
   

   Connector	Terminal (Wire color)	Condition		Voltage (Approx.)
   E142	17 (G/Y) - Ground	Vehicle stopped Engine running A/T selector lever "N" position Brake pedal depressed	4WD shift switch: 4H and 4LO	0V
   			4WD shift switch: 2WD	Battery voltage

OK or NG 

1. OK: GO TO 5.
2. NG: GO TO 2.

1. Turn ignition switch "OFF".
2. Disconnect transfer control unit harness connector and the wait detection switch harness connector.
3. Check continuity between transfer control unit harness connector E142 terminal 17 (G/Y) and wait detection switch harness connector F59 terminal 10 (G/Y).

   Continuity should exist. 

   Fig 3: Checking Continuity Between Transfer Control Unit Harness Connector E142 Terminal 17 And Wait Detection Switch Harness Connector F59 Terminal 10

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

   Also check harness for short to ground and short to power.

OK or NG 

1. OK: GO TO 3.
2. NG: Repair or replace damaged parts.

1. Turn ignition switch "OFF".
2. Disconnect wait detection switch harness connector.
3. Check continuity between wait detection switch harness connector F59 terminal 11 (B) and ground.

   Continuity should exist. 

   Fig 4: Checking Continuity Between Wait Detection Switch Harness Connector F59 Terminal 11 And Ground

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

   Also check harness for short to power.

OK or NG 

1. OK: GO TO 4.
2. NG: Repair open circuit or short to power in harness or connectors.

1. Turn ignition switch "OFF".
2. Disconnect wait detection switch harness connector.
3. Remove wait detection switch.
4. Push and release wait detection switch and check continuity between wait detection switch terminals 10 and 11.
   Fig 5: Checking Continuity Between Wait Detection Switch Terminals 10 And 11

   Courtesy of NISSAN MOTOR CO., U.S.A.
   CONTINUITY BETWEEN WAIT DETECTION SWITCH TERMINALS 10 AND 11 REFERENCE
   
   

   Terminal	Condition	Continuity
   10 - 11	Push wait detection switch	Yes
   	Release wait detection switch	No

OK or NG 

1. OK: GO TO 5.
2. NG: Replace wait detection switch. Refer to "LOCATION OF ELECTRICAL PARTS ".

Check transfer control unit input/output signal. Refer to "TRANSFER CONTROL UNIT INPUT/OUTPUT SIGNAL REFERENCE VALUES ".

OK or NG 

1. OK: GO TO 6.
2. NG: Check transfer control unit pin terminals for damage or loose connection with harness connector.

   If any items are damaged, repair or replace damaged parts.

Perform the self-diagnosis, after driving a vehicle for a while.

OK or NG 

1. OK: Inspection End.
2. NG: Replace transfer control unit. Refer to "REMOVAL AND INSTALLATION ".