DTC P0662 [LF]

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DTC P0662 [LF]

B3E010201088W04

DTC P0662 | Variable intake-air solenoid valve circuit high input
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DETECTION CONDITION

• The PCM monitors the variable intake-air solenoid valve control signal at PCM terminal 2AJ. If the PCM turns variable intake-air solenoid valve on but voltage at PCM terminal 2AJ still remains high, the PCM determines that the 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.
• FREEZE FRAME DATA is not available.
• The DTC is stored in the PCM memory.

POSSIBLE CAUSE | • Variable intake-air solenoid valve malfunction • Short to power supply in wiring harness between variable intake-air solenoid valve terminal B and PCM terminal 2AJ • Shorted variable intake-air solenoid valve or PCM connector • PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • 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 REPAIR INFORMATION AVAILABILITY • Verify related service 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 | INSPECT VARIABLE INTAKE-AIR SOLENOID VALVE CONNECTOR FOR POOR CONNECTION • 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 7.
No | Go to the next step.
4 | INSPECT VARIABLE INTAKE-AIR SOLENOID VALVE MALFUNCTION • Perform variable intake-air solenoid valve inspection. (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 7.
5 | INSPECT PCM CONNECTOR FOR POOR CONNECTION • Turn the ignition switch off. • Disconnect the PCM connector. • Inspect for poor connection at terminal 2AJ. (such as damaged/pulled-out pins, corrosion). • Is there malfunction? | Yes | Repair the terminal, then go to Step 7.
No | Go to the next step.

6

INSPECT VARIABLE INTAKE-AIR SOLENOID VALVE CONTROL CIRCUIT SHORT TO POWER SUPPLY
• 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

Repair or replace the wiring harness for short to power supply, then go to the next step.

No | Go to the next step.

7

VERIFY TROUBLESHOOTING OF DTC P0662 COMPLETED
• 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 WDS or equivalent.
• 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.
8 | VERIFY AFTER REPAIR PROCEDURE • Perform the "After Repair Procedure". (See AFTER REPAIR PROCEDURE [LF].) • Are any DTC present? | Yes | Go to the applicable DTC troubleshooting. (See DTC TABLE [LF].)
No | Troubleshooting completed.