Actuator Motor
Actuator MotorCONSULT-II REFERENCE VALUE IN DATA MONITOR MODE:
TRANSFER CONTROL UNIT TERMINALS AND REFERENCE VALUE:
DIAGNOSTIC PROCEDURE
1. CHECK ACTUATOR MOTOR SIGNAL
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 "SHIFT ACT1", "SHIFT AC MON1", "SHIFT ACT2", "SHIFT AC MON2".
Without CONSULT-II
1. Start engine.
2. Depress brake pedal and stop vehicle.
3. Set A/T selector lever to "N" position.
Part 1:
Part 2:
4. Check voltage between transfer control unit harness connector terminal and ground.
OK or NG
OK >> GO TO 9.
NG >> GO TO 2.
2. CHECK ACTUATOR MOTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector.
3. Check voltage between transfer control unit harness connector terminal 27 and ground.
4. Turn ignition switch "ON".
5. Check voltage between transfer control unit harness connector terminal 27 and ground.
OK or NG
OK >> GO TO 3.
NG >>
1. Check harness for short or open between transfer control unit harness connector E143 terminal 27 and transfer shut off relay 2 harness connector E47 terminal 3 and 10A fuse (No. 26, located in the fuse and fusible link box). If any items are damaged, repair or replace damaged parts.
2. Perform trouble diagnosis for power supply circuit. Refer to TF-40, "Power Supply Circuit For Transfer Control Unit". Power Supply Circuit For Transfer Control Unit
3. CHECK TRANSFER SHIFT RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Remove transfer shift high relay and transfer shift low relay.
3. Check voltage between transfer control unit harness connector terminal and ground.
4. Turn ignition switch "ON". (Do not start engine.)
5. Check voltage between transfer control unit harness connector terminal and ground.
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 transfer control unit harness connector terminal 27 and transfer shift high relay harness connector E156 terminal 2.
^ Harness for short or open between transfer control unit harness connector terminal 27 and transfer shift low relay harness connector terminal E157 terminal 2.
4. CHECK TRANSFER SHIFT RELAY
1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Remove transfer shift high relay and transfer shift low relay.
3. Apply 12V direct current between transfer shift high relay and transfer shift low relay terminals 1 and 2.
4. Check continuity between relay terminals 3 and 4, 3 and 5.
OK or NG
OK >> GO TO 5.
NG >> Replace the transfer relay.
5. CHECK (1) HARNESS BETWEEN TRANSFER CONTROL UNIT AND TRANSFER SHIFT RELAY
1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector.
3. Remove transfer shift high relay and transfer shift low relay.
4. Check continuity between the following terminals.
- Transfer control unit harness connector E143 (A) terminal 42 and transfer shift high relay harness connector E156 (B) terminal 1.
- Transfer control unit harness connector E143 (A) terminal 50 and transfer shift low relay harness connector E157 (C) terminal 1.
Continuity should exist.
Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 6.
NG >> Repair or replace damaged parts.
6. CHECK (2) HARNESS BETWEEN TRANSFER CONTROL UNIT AND TRANSFER SHIFT RELAY
1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector.
3. Remove transfer shift high relay and transfer shift low relay.
4. Check continuity between the following terminals.
- Transfer control unit harness connector E143 (A) terminal 28 and transfer shift high relay harness connector E156 (B) terminal 5.
- Transfer control unit harness connector E143 (A) terminal 28 and transfer shift low relay harness connector E157 (C) terminal 5.
- Transfer control unit harness connector E143 (A) terminal 31 and transfer shift high relay harness connector E156 (B) terminal 4.
- Transfer control unit harness connector E143 (A) terminal 31 and transfer shift low relay harness connector E157 (C) terminal 4.
Continuity should exist.
Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
7. CHECK ACTUATOR MOTOR OPERATION CIRCUIT
1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector and the transfer control device (actuator motor) harness connector.
3. Check continuity between the following terminals.
- Transfer control unit harness connector E143 terminal 48 and transfer control device (actuator motor) harness connector F58 terminal 23.
- Transfer control unit harness connector E143 terminal 47 and transfer control device (actuator motor) harness connector F58 terminal 24.
- Transfer control device (actuator motor) harness connector F58 (A) terminal 24 and transfer shift high relay harness connector E156 (B) terminal 3.
- Transfer control device (actuator motor) harness connector F58 (A) terminal 23 and transfer shift low relay harness connector E157 (C) terminal 3.
Continuity should exist.
Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.
8. CHECK ACTUATOR MOTOR
1. Remove transfer control device.
2. Check operation by applying battery voltage to transfer control device (actuator motor) terminals 23 and 24.
CAUTION: Be careful not to overheat the harness.
Does actuator motor rotate?
YES >> GO TO 9.
NO >> Replace transfer control device (actuator motor).
9. CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to TF-29, "Transfer Control Unit Input/Output Signal Reference Values". Pinout Values and Diagnostic Parameters
OK or NG
OK >> GO TO 10.
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.
10. 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
Actuator Motor
1. Remove transfer control device.
2. Check operation by applying battery voltage to transfer control device (actuator motor) terminals 23 and 24.
CAUTION: Be careful not to overheat the harness.
3. If NG, replace transfer control device (actuator motor).
Transfer Relay
1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Remove transfer shift high relay and transfer shift low relay.
3. Apply 12V direct current between transfer relay terminals 1 and 2.
4. Check continuity between relay terminals 3 and 4, and 3 and 5.
5. If NG, replace transfer shift high or low relay.