P1819

P1819 Transfer Control Device

Description

The transfer control device integrates the actuator motor and actuator position switch. DTC P1819 will set if either of the following conditions exist:

- Malfunction occurs in transfer control device drive circuit.
- Malfunction is detected in transfer shut off relay 1 and transfer shut off relay 2.

DTC Logic

DTC Detection Logic






DTC Confirmation Procedure

1. DTC CONFIRMATION PROCEDURE

1 Turn ignition switch ON.
2 Perform "DTC check".

Is DTC P1819 detected?
YES
Perform diagnosis procedure. Refer to "Diagnosis Procedure".
NO
Inspection End.

Diagnosis Procedure

Regarding Wiring Diagram information, refer to [Transfer Control Unit: Wiring Diagram] .

1. CHECK POWER SUPPLY

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 and ground.











4 Turn ignition switch "ON". (Do not start engine.)





5 Check voltage between transfer control unit harness connector terminals and ground.






Are the inspection results normal?
YES
GO TO 2.
NO
Check the following. If any items are damaged, repair or replace damaged parts.

- 10 A fuse (No. 57, located in the fuse and relay box).
- 40 A fuse (No. J, located in the fuse and fusible link box).
- Harness for short or open between battery and transfer shut off relay 1 harness connector E156 terminal 3.
- Harness for short or open between transfer control unit harness connector M153 terminal 27 and transfer shut off relay 1 harness connector E156 terminal 5.
- Harness for short or open between ignition switch and transfer shut off relay 1 harness connector E156 terminal 1.
- Harness for short or open between transfer shut off relay 1 harness connector E156 terminal 2 and ground.
- Harness for short or open between ignition switch and transfer control unit harness connector M152 terminal 25.
- Battery and ignition switch.
- Transfer shut off relay 1. Refer to [P1801, P1811 Power Supply Circuit for Transfer Control Unit] P1801.

2. CHECK GROUND CIRCUIT

1 Turn ignition switch "OFF".
2 Disconnect transfer control unit harness connector.
3 Check continuity between transfer control unit harness connector M153 terminal 32 and ground.











Also check harness for short to power.

Is there continuity?
YES
GO TO 3.
NO
Repair open circuit or short to power in harness or connectors.

3. CHECK POWER SUPPLY SIGNAL

1 Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2 Connect transfer control unit harness connector.
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.






Are the inspection results normal?
YES
GO TO 4.
NO
Check the following. If any items are damaged, repair or replace damaged parts.

- Harness for short or open between battery and transfer shut off relay 2 harness connector E157 terminal 1.
- Harness for short or open between transfer shut off relay 2 harness connector E157 terminal 2 and transfer control unit harness connector M153 terminal 40.
- Transfer shut off relay 2.

4. CHECK TRANSFER CONTROL UNIT

Check transfer control unit input/output signal. Refer to [Transfer Control Unit: Reference Value] .

Are the inspection results normal?
YES
GO TO 5 (With SDT) or GO TO 6 (Without SDT).
NO
Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.

5. PERFORM DTC CHECK (WITH SDT)

With SDT

1 Turn ignition switch "ON". (Do not start engine.)
2 Select "DTC check" mode for "4WD" with SDT.
3 Touch "Clear".
4 Turn ignition switch "OFF" and wait at least 10 seconds.
5 Perform the "DTC check" again.

Is the "SHIFT ACT CIR [P1819]" displayed?
YES
Replace transfer control unit. Refer to [Transfer Control Unit: Removal and Installation] .
NO
Inspection End.

6. PERFORM SELF-DIAGNOSIS (WITHOUT SDT)

Without SDT

1 Perform the self-diagnosis and then erase self-diagnostic results. Refer to [SDT Function (4WD)] .
2 Perform the self-diagnosis again.

Do the self-diagnostic results indicate transfer control device?
YES
Replace transfer control unit. Refer to [Transfer Control Unit: Removal and Installation] .
NO
Inspection End.