4WD Shift Switch

4WD Shift Switch





CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE





TRANSFER CONTROL UNIT TERMINALS AND REFERENCE VALUE

CAUTION: When using a circuit tester to measure voltage for inspection, be sure not to extend forcibly any connector terminals.

DIAGNOSTIC PROCEDURE
1. CHECK 4WD SHIFT SWITCH SIGNAL
With CONSULT-II
1. Turn ignition switch "ON". (Do not start engine.)
2. Select "DATA MONITOR" mode for "ALL MODE AWD/4WD" with CONSULT-II.





3. Read out ON/OFF switching action of the "2WD SWITCH", "AUTO SWITCH", "LOCK SWITCH", "4L SWITCH" with operating 4WD shift switch.

Without CONSULT-II
1. Turn ignition switch "ON". (Do not start engine.)









2. Check voltage between transfer control unit harness connector terminals and ground.

OK or NG
OK >> GO TO 5.
NG >> GO TO 2.

2. CHECK 4WD SHIFT SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Disconnect 4WD shift switch harness connector.









3. Check voltage between 4WD shift switch harness connector terminal 1 and ground.
4. Turn ignition switch "ON". (Do not start engine.)









5. Check voltage between 4WD shift switch harness connector terminal 1 and ground.

OK or NG
OK >> GO TO 3.
NG >> Go to TF-54, "Power Supply Circuit For Transfer Control Unit" Power Supply Circuit.

3. CHECK HARNESS BETWEEN 4WD SHIFT SWITCH AND TRANSFER CONTROL UNIT
1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector and the 4WD shift switch harness connector.





3. Check continuity between the following terminals.
- Transfer control unit harness connector E142 terminal 9 (G/W) and 4WD shift switch harness connector M141 terminal 2 (G/W).
- Transfer control unit harness connector E142 terminal 18 (O) and 4WD shift switch harness connector M141 terminal 5 (O).
- Transfer control unit harness connector E142 terminal 23 (R) and 4WD shift switch harness connector M141 terminal 6 (R).
- Transfer control unit harness connector E142 terminal 24 (LG/R) and 4WD shift switch harness connector M141 terminal 3 (LO/ R).
Continuity should exist.
Also check harness for short to ground and short to power.

OK or NG
OK >> GO TO 4.
NG >> Check the following. If any items are damaged, repair or replace damaged parts.
^ Harness for short or open between battery and transfer shut off relay harness connector E69 terminal 3 (G).
^ Power supply circuit for transfer control unit.

4. CHECK 4WD SHIFT SWITCH
1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Disconnect 4WD shift switch harness connector.









3. Operate 4WD shift switch and check continuity between 4WD shift switch terminals.

OK or NG
OK >> GO TO 5.
NG >> Replace 4WD shift switch.

5. CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal.

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.

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

OK or NG
OK >> Inspection End.
NG >> Replace transfer control unit.

COMPONENT INSPECTION
1. Turn ignition switch "OFF". (Stay for at least 5 second.)
2. Disconnect 4WD shift switch harness connector.









3. Operate 4WD shift switch and check continuity between 4WD shift switch terminals.
4. If NO, replace the 4WD shift switch.