Differential Lock Mode Switch
Differential Lock Mode SwitchCONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Data are reference value.
DIFFERENTIAL LOCK CONTROL UNIT TERMINALS AND REFERENCE VALUE
Data are reference value and are measured between each terminal and around.
CAUTION: When using a circuit tester to measure voltage for inspection, be sure not to extend forcibly any connector terminals.
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 POWER SUPPLY ROUTING CIRCUIT.
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 (G) and differential lock mode switch harness connector M149 terminal 2 (G).
^ Differential lock control unit harness connector B77 terminal 22 (O) and differential lock mode switch harness connector M149 terminal 1 (O).
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 Differential Lock Control Unit Input/Output Signal Reference Values.
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. Refer to 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.