DTC P0661

Variable intake air solenoid valve circuit low input

DETECTION CONDITION

• The PCM monitors the variable intake air solenoid valve control signal. If the PCM turns variable intake air solenoid valve off but voltage at PCM terminal still remains low, the PCM determines that variable intake air solenoid valve circuit has malfunction.

Diagnostic support note

• This is a continuous monitor (Other).

• The MIL does not illuminate.

• PENDING CODE is available if the PCM detects the above malfunction condition.

• The FREEZE FRAME DATA is available.

• The DTC is stored in the PCM memory.

POSSIBLE CAUSE

• Variable intake air solenoid valve malfunction

• Open circuit in wiring harness between main relay and variable intake air solenoid valve terminal A

• Open circuit in wiring harness between variable intake air solenoid valve terminal B and PCM terminal 2J

• Short to ground in wiring harness between variable intake air solenoid valve terminal B and PCM terminal 2J

• Connector or terminal malfunction

• PCM malfunction

STEP

INSPECTION

ACTION

1

• Has FREEZE FRAME DATA been recorded?

Yes

Go to the next step.

No

Record the FREEZE FRAME DATA on the repair order, then 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

• Turn the ignition switch off.

• Disconnect the variable intake air solenoid valve connector.

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

• Is there malfunction?

Yes

Repair or replace the terminal, then go to Step 9.

No

Go to the next step.

4

• Inspect the variable intake air solenoid valve.

  (See VARIABLE INTAKE AIR SOLENOID VALVE INSPECTION [LF].)

• Is the variable intake air solenoid valve normal?

Yes

Go to the next step.

No

Replace the variable intake air solenoid valve, then go to Step 9.

(SeeVARIABLE INTAKE AIR SOLENOID VALVE REMOVAL/INSTALLATION [LF].)

5

• Turn the ignition switch to the ON position (Engine off).

• Measure the voltage between variable intake air solenoid valve terminal A (wiring harness-side) and body ground.

• Is the voltage B+?

Yes

Go to the next step.

No

Repair or replace the wiring harness for open, then go to Step 9.

6

• Inspect for continuity between variable intake air solenoid valve terminal B (wiring harness-side) and body ground.

• Is there continuity?

Yes

Repair or replace the wiring harness for short to ground, then go to Step 9.

No

Go to the next step.

7

• Disconnect the PCM connector.

• Inspect for poor connection at terminal 2J. (damaged/pulled-out pins, corrosion, etc.).

• Is there any malfunction?

Yes

Repair the terminal, then go to Step 9.

No

Go to the next step.

8

• Inspect for continuity between variable intake air solenoid valve terminal B (wiring harness-side) and PCM terminal 2J (wiring harness-side).

• Is there continuity?

Yes

Go to the next step.

No

Repair or replace the wiring harness for open circuit, then go to the next step.

9

• Make sure to reconnect all disconnected connectors.

• Turn the ignition switch to the ON position (Engine off).

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

• Perform the following procedures, or KOEO self-test with M-MDS.

  (See KOEO/KOER SELF TEST [LF].)

• Access RPM PID.

• Increase the engine speed 4,750 rpm or more for 10 times.

• Is the same DTC present?

Yes

Replace the PCM, then go to the next step.

(See PCM REMOVAL/INSTALLATION [LF].)

No

Go to the next step.

10

• Perform the “AFTER REPAIR PROCEDURE”.

  (See AFTER REPAIR PROCEDURE [LF].)

• Is any DTC present?

Yes

Go to the applicable DTC troubleshooting.

(See DTC TABLE [LF].)

No

Troubleshooting completed.