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P1817


P1817 ACTUATOR MOTOR





Description
The actuator motor receives signals from the transfer control unit and controls shift rods which shift the transfer case. DTC P1817 or flash code 11 will set when any of the following occur:
- Motor does not operate properly due to open or short circuit in actuator motor.
- Malfunction is detected in the actuator motor. (When 4WD shift switch is operated and actuator motor does not operate)
- Malfunction is detected in transfer shift high relay or transfer shift low relay.




DTC Logic

DTC DETECTION LOGIC






DTC CONFIRMATION PROCEDURE
1.DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Perform self-diagnosis.
Is DTC P1817 or flash code 11 detected?
YES - Perform diagnosis procedure. SEE Diagnosis Procedure.
NO - Inspection End.




Diagnosis Procedure
Regarding Wiring Diagram information, .
1.CHECK ACTUATOR MOTOR SIGNAL

With CONSULT-III
1. Start engine.
2. Select DATA MONITOR mode for ALL MODE AWD/4WD with CONSULT-III.
3. Read out the value of SHIFT ACT1, SHIFT AC MON1, SHIFT ACT2, SHIFT AC MON2.






Without CONSULT-III
1. Start engine.
2. Depress brake pedal and stop vehicle.
3. Set A/T selector lever to N position.





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. P1801.
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 shift high/low relay harness connector terminals and ground.










4. Turn ignition switch ON. (Do not start engine.)
5. Check voltage between transfer shift high/low relay harness connector terminals 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.






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
5. and transfer shift low relay harness connector E157 (C) terminal
- 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.






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 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.






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.
9.CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. .
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 the inspection results are abnormal replace the transfer control device.

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.
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