DTC P1380:00

Electric variable valve timing control circuit problem

DETECTION CONDITION

• A malfunction is detected in the results of the on-board diagnostic test received from the electric variable valve timing driver.

Diagnostic support note

• This is a continuous monitor (CCM).

• The check engine light does not illuminate.

• FREEZE FRAME DATA is not available.

• Snapshot data is available.

• DTC is stored in the PCM memory.

FAIL-SAFE FUNCTION

• Stops activation of the electric variable valve timing driver.

POSSIBLE CAUSE

• Electric variable valve timing motor/driver connectors or terminals malfunction

• Short to ground in wiring harness between electric variable valve timing motor/driver terminal 1A and PCM terminal 1AE

• PCM connector or terminals malfunction

• Short to power supply in wiring harness between electric variable valve timing motor/driver terminal 1A and PCM terminal 1AE

• Open circuit in wiring harness between electric variable valve timing motor/driver terminal 1A and PCM terminal 1AE

• Electric variable valve timing driver malfunction

• Electric variable valve timing motor malfunction

• PCM malfunction

Item (definition)

Unit/Condition

Definition

Condition/Specification (Reference)

VT_IN_ACT

°(deg)

Actual intake variable valve timing control

• Advance amount from max retard position

• Displays actual intake variable valve timing—advance amount from max retard position

Ignition switched ON (engine off)

• Approx. 28 ° (ECT is 89 °C {192 °F})

Idle (after warm up)

• Approx. 24.75 ° (ECT is 91 °C {196 °F})

Racing (engine speed is 2,000 rpm)

• Approx. 18.62 ° (ECT is 89 °C {192 °F})

Racing (engine speed is 4,000 rpm)

• Approx. 0.18 ° (ECT is 88 °C {190 °F})

VT_IN_DES

°(deg)

Target intake variable valve timing control

• Advance amount from max retard position

• Displays target intake variable valve timing—advance amount from max retard position

Ignition switched ON (engine off)

• Approx. 27.81 ° (ECT is 89 °C {192 °F})

Idle (after warm up)

• Approx. 24.56 ° (ECT is 91 °C {196 °F})

Racing (engine speed is 2,000 rpm)

• Approx. 18.62 ° (ECT is 89 °C {192 °F})

Racing (engine speed is 4,000 rpm)

• Approx. 0 ° (ECT is 88 °C {190 °F})

STEP

INSPECTION

ACTION

1

NOTE:

• Recording can be facilitated using the screen capture function of the PC.

• Record the snapshot data on the repair order.

—

Go to the next step.

2

• Verify related Service Bulletins and/or on-line repair information availability.

• Is any related repair information available?

Yes

Perform repair or diagnosis according to the available repair information.

• If the vehicle is not repaired, go to the next step.

No

Go to the next step.

3

• Switch the ignition off.

• Disconnect the electric variable valve timing motor/driver connector.

• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).

• Is there any malfunction?

Yes

Repair or replace the connector and/or terminals, then go to Step 10.

No

Go to the next step.

4

• Verify that the electric variable valve timing motor/driver connector is disconnected.

• Inspect for continuity between electric variable valve timing motor/driver terminal 1A (wiring harness-side) and body ground.

• Is there continuity?

Yes

Disconnect the PCM connector and inspect the wiring harness for short to ground.

• If the short to ground circuit could be detected in the wiring harness:

• Refer to the wiring diagram and verify whether or not there is a common connector between electric variable valve timing motor/driver terminal 1A and PCM terminal 1AE.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to ground.

• If the short to ground circuit could not be detected in the wiring harness:

• Replace the PCM (short to ground in the PCM internal circuit).

  (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

Go to Step 10.

No

Go to the next step.

5

• Disconnect the PCM connector.

• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).

• Is there any malfunction?

Yes

Repair or replace the connector and/or terminals, then go to Step 10.

No

Go to the next step.

6

• Verify that the electric variable valve timing motor/driver and PCM connectors are disconnected.

• Switch the ignition ON (engine off).

  NOTE:

  • Another DTC may be stored by the PCM detecting an open circuit.

• Measure the voltage at the electric variable valve timing motor/driver terminal 1A (wiring harness-side).

• Is the voltage 0 V?

Yes

Go to the next step.

No

Refer to the wiring diagram and verify whether or not there is a common connector between electric variable valve timing motor/driver terminal 1A and PCM terminal 1AE.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to power supply.

Go to Step 10.

7

• Verify that the electric variable valve timing motor/driver and PCM connectors are disconnected.

• Switch the ignition off.

• Inspect for continuity between electric variable valve timing motor/driver terminal 1A (wiring harness-side) and PCM terminal 1AE (wiring harness-side).

• Is there continuity?

Yes

Go to the next step.

No

Refer to the wiring diagram and verify whether or not there is a common connector between electric variable valve timing motor/driver terminal 1A and PCM terminal 1AE.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has an open circuit.

Go to Step 10.

8

• Inspect the electric variable valve timing driver.

  (See ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER INSPECTION [SKYACTIV-G 2.0].)

• Is there any malfunction?

Yes

Replace the electric variable valve timing motor/driver, then go to Step 10.

(See ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

No

Go to the next step.

9

• Inspect the electric variable valve timing motor.

  (See ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER INSPECTION [SKYACTIV-G 2.0].)

• Is there any malfunction?

Yes

Replace the electric variable valve timing motor/driver, then go to the next step.

(See ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

No

Go to the next step.

10

• Always reconnect all disconnected connectors.

• Clear the DTC from the PCM memory using the M-MDS.

  (See AFTER REPAIR PROCEDURE [PCM (SKYACTIV-G 2.0)].)

• Perform the KOER self test.

  (See KOEO/KOER SELF TEST [PCM (SKYACTIV-G 2.0)].)

• Is the same DTC present?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the PCM.

  (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

Go to the next step.

No

Go to the next step.

11

• Perform the “AFTER REPAIR PROCEDURE”.

  (See AFTER REPAIR PROCEDURE [PCM (SKYACTIV-G 2.0)].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [PCM (SKYACTIV-G 2.0)].)

No

DTC troubleshooting completed.