Diagnostic Procedure

With CONSULT-II 

1. Start engine.
2. Select "DATA MONITOR" mode for "ALL MODE AWD/4WD" with CONSULT-II.
3. Read out ON/OFF switching action of "LINE PRES SW" while operating 4WD shift switch.
   DATA MONITOR DISPLAY REFERENCE CHART
   
   

   Condition		Display value
   A/T selector lever "D" position 4WD shift switch: AUTO		ON
   Except the above The vehicle has been left at room temperature for 5 minutes and more with ignition switch in "OFF" position.	Ignition switch: ON A/T selector lever: "P" or "N" position 4WD shift switch: other than AUTO	OFF

   Fig 1: CONSULT-II Display - Data Monitor

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

Without CONSULT-II 

1. Start engine.
2. Check voltage between transfer control unit harness connector terminals and ground.
   TERMINALS VOLTAGE CHART
   
   

   Connector	Terminal	Condition		Voltage (Approx.)
   E143	35 - Ground	A/T selector lever "D" position	4WD shift switch: AUTO	0V
   		Except the above The vehicle has been left at room temperature for 5 minutes and more with ignition switch in "OFF" position.	Ignition switch: ON A/T selector lever: "P" or "N" position 4WD shift switch: other than AUTO	Battery voltage

   Fig 2: Identifying Voltage Between Transfer Control Unit Harness Connector Terminals And Ground

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

OK or NG 

1. OK : GO TO  5.
2. NG : GO TO 2.

1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector and the transfer terminal cord assembly harness connector.
3. Check continuity between transfer control unit harness connector E143 terminal 35 and transfer terminal cord assembly harness connector F56 terminal 1.

   Continuity should exist. 

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

   Fig 3: Identifying Continuity Between Transfer Control Unit Terminal 35 And Transfer Terminal Cord Assembly Terminal 1

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

OK or NG 

1. OK : GO TO 3.
2. NG : Repair or replace damaged 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 4.
2. NG : Check the following. If any items are damaged, repair or replace damaged parts.
   • Transfer control unit pin terminals for damage or loose connection with harness connector.
   • Transfer control unit. Refer to "REMOVAL AND INSTALLATION ".

1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Remove line pressure switch. Refer to "LOCATION OF ELECTRICAL PARTS ".
3. Push and release line pressure switch and check continuity between transfer terminal cord assembly terminal 1 and ground.
   TERMINALS CONTINUITY CHART
   
   

   Terminal	Condition	Continuity
   1 - Ground	Push line pressure switch	Yes
   	Release line pressure switch	No

   Fig 4: Identifying Continuity Between Transfer Terminal Cord Assembly Terminal 1 And Ground

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

OK or NG 

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

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

OK or NG 

1. OK : GO TO 6.
2. NG : Replace transfer control unit. Refer to "REMOVAL AND INSTALLATION ".

Perform cruise test. Refer to "CRUISE TEST ".

OK or NG 

1. OK : Inspection End.
2. NG : Perform the applicable trouble diagnosis.