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 SW".
   DISPLAY VALUE CONDITION
   
   

   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

   Fig 1: Identifying CONSULT II - DATA MONITOR Screen

   

Without CONSULT-II 

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

   Connector	Terminal	Condition		Voltage (Approx.)
   E142	17 - 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

   Fig 2: Checking Voltage Between Transfer Control Unit Connector Terminal 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 wait detection switch harness connector.
3. Check continuity between transfer control unit harness connector M152 terminal 17 and wait detection switch harness connector F59 terminal 10.

   Continuity should exist. 

   Fig 3: Checking Continuity Between Transfer Control Unit And Wait Detection Switch Terminals

   

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

OK or NG 

OK: GO TO 3.

NG: Repair or replace damaged parts.

1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Disconnect wait detection switch harness connector.
3. Check continuity between wait detection switch harness connector F59 terminal 11 and ground.

   Continuity should exist. 

   Also check harness for short to power.

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

   

OK or NG 

OK: GO TO 4.

NG: Repair open circuit or short to power in harness or connectors.

1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Disconnect wait detection switch harness connector.
3. Remove wait detection switch. Refer to "LOCATION OF ELECTRICAL PARTS ".
4. Push and release wait detection switch and check continuity between wait detection switch terminals 10 and 11.
   CONNECTOR TERMINAL CONTINUITY REFERENCE
   
   

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

Fig 5: Checking Continuity Between Wait Detection Switch Terminals 10 And 11

OK or NG 

OK: GO TO 5.

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 

OK: GO TO 6.

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 

OK: Inspection End.

NG: Replace transfer control unit. Refer to "REMOVAL AND INSTALLATION ".