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 the "CL PRES SW" while operating 4WD shift switch.
   DISPLAY VALUE CONDITION
   
   

   Condition		Display value
   Ignition switch: ON A/T selector lever "D" position	4WD shift switch: AUTO or 4H ("Wait" function is not operating.)	ON
   Ignition switch: ON	4WD shift switch: 2WD ("Wait" function is not operating.)	OFF

   Fig 1: Identifying CONSULT-II Display - DATA MONITOR

   

Without CONSULT-II 

1. Start engine.
2. Check voltage between transfer control unit harness connector terminals and ground.
   CONNECTOR TERMINAL VOLTAGE REFERENCE
   
   

   Connector	Terminal	Condition		Voltage (Approx.)
   M153	34 - Ground	Ignition switch: ON A/T selector lever "D" position	4WD shift switch: AUTO or 4H ("Wait" function is not operating.)	0V
   		Ignition switch: ON	4WD shift switch: 2WD ("Wait" function is not operating.)	Battery voltage

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

   

OK or NG 

OK: GO TO  5.

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 M153 terminal 34 and transfer terminal cord assembly harness connector F56 terminal 7.

   Continuity should exist. 

OK or NG 

OK: GO TO 3.

NG: Repair or replace damaged parts.

Fig 3: Checking Continuity Between Transfer Control Unit And Transfer Terminal Cord Assembly

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

OK or NG 

OK: GO TO 4.

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.

1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Remove clutch pressure switch. Refer to "LOCATION OF ELECTRICAL PARTS ".
3. Push and release clutch pressure switch and check continuity between transfer terminal cord assembly terminal 7 and ground.
   CONNECTOR TERMINAL CONTINUITY REFERENCE
   
   

   Terminal	Condition	Continuity
   7 - Ground	Push clutch pressure switch	Yes
   	Release clutch pressure switch	No

   Fig 4: Checking Continuity Between Transfer Terminal Cord Assembly Terminal 7 And Ground

   

OK or NG 

OK: GO TO 5.

NG: Replace clutch pressure switch. Refer to "LOCATION OF ELECTRICAL PARTS ".

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

OK or NG 

OK: GO TO 6.

NG: Replace transfer control unit. Refer to "TRANSFER CONTROL UNIT ".

Perform cruise test. Refet to "CRUISE TEST ".

OK or NG 

OK: Inspection End.

NG: Perform the applicable trouble diagnosis.