Differential Lock Mode Switch
Differential Lock Mode SwitchCONSULT-II REFERENCE VALUE IN DATA MONITOR MODE:
DIFFERENTIAL LOCK CONTROL UNIT TERMINALS AND REFERENCE VALUE:
DIAGNOSTIC PROCEDURE
1. CHECK DIFFERENTIAL LOCK MODE SWITCH SIGNAL
With CONSULT-II
1. Start engine.
2. Select "DATA MONITOR" mode for "DIFF LOCK" with CONSULT-II.
3. Read out ON/OFF switching action of "D-LOCK SW SIG".
Without CONSULT-II
1. Turn ignition switch "ON".
2. Check voltage between differential lock control unit harness connector terminals and ground.
OK or NG
OK >> GO TO 5.
NG >> GO TO 2.
2. CHECK DIFFERENTIAL LOCK MODE SWITCH SUPPLY CIRCUIT
1. Turn ignition switch "ON".
2. Disconnect differential lock mode switch harness connector.
3. Check voltage between differential lock mode switch harness connector terminal 3 and ground.
4. Turn ignition switch "OFF".
5. Check voltage between differential lock mode switch harness connector terminal 3 and ground.
OK or NG
OK >> GO TO 3.
NG >> Check the following. If any items are damaged, repair or replace damaged parts.
^ 10A fuse [No. 15, located in fuse block (J/B)]
^ Harness for short or open between ignition switch and differential lock mode switch harness connector terminals 3
^ Ignition switch. Refer to PG-4, "POWER SUPPLY ROUTING CIRCUIT".
Power Supply Routing Circuit Schematic
3. CHECK DIFFERENTIAL LOCK MODE SWITCH
1. Turn ignition switch "OFF".
2. Disconnect differential lock mode switch harness connector.
3. Operate differential lock mode switch and check continuity between differential lock mode switch terminals.
OK or NG
OK >> GO TO 4.
NG >> Replace differential lock mode switch.
4. CHECK HARNESS BETWEEN DIFFERENTIAL LOCK CONTROL UNIT AND DIFFERENTIAL LOCK MODE SWITCH
1. Turn ignition switch "OFF".
2. Disconnect differential lock control unit harness connector and differential lock mode switch harness connector.
3. Check continuity between the following terminals.
- Differential lock control unit harness connector B77 terminal 9 and differential lock mode switch harness connector M72 terminal 2.
- Differential lock control unit harness connector B77 terminal 22 and differential lock mode switch harness connector M72 terminal 1.
Continuity should exist.
Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
5. CHECK DIFFERENTIAL LOCK CONTROL UNIT
Check differential lock control unit input/output signal. Refer to RFD-49, "Differential Lock Control Unit Input/Output Signal Reference Values". Pinout Values and Diagnostic Parameters
OK or NG
OK >> GO TO 6.
NG >> Check differential lock 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 differential lock control unit.
COMPONENT INSPECTION
1. Turn ignition switch "OFF".
2. Disconnect differential lock mode switch harness connector.
3. Operate differential lock mode switch and check continuity between differential lock mode switch terminals.
4. If NG, replace differential lock mode switch.