Line Pressure Switch

Line Pressure 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 LINE PRESSURE SWITCH SIGNAL

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.

Without CONSULT-II
1. 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 HARNESS BETWEEN TRANSFER CONTROL UNIT AND LINE PRESSURE SWITCH
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.
Continuity should exist.
Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.

3. CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to TF-35, "Transfer Control Unit Input/Output Signal Reference Values". Transfer Control Unit Input/Output Signal Reference Values
OK or NG
OK >> GO TO 4.
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.

4. CHECK LINE PRESSURE SWITCH
1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Remove line pressure switch.








3. Push and release line pressure switch and check continuity between transfer terminal cord assembly terminal and ground.
OK or NG
OK >> GO TO 5.
NG >> Replace line pressure switch.

5. CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
OK or NG
OK >> GO TO 6.
NG >> Replace transfer control unit.

6. CRUISE TEST
Perform cruise test. Refer to TF-33, "CRUISE TEST". Cruise Test
OK or NG
OK >> Inspection End.
NG >> Perform the applicable trouble diagnosis.

COMPONENT INSPECTION
1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Remove line pressure switch.








3. Push and release line pressure switch and check continuity between transfer terminal cord assembly terminal and ground.
4. If NG, replace the line pressure switch.