Low Idling Speed

LOW IDLING SPEED; ENGINE SPEED DIPS WHEN IDLING

Conditions for Fault Tracing
^ No DTCs present.
^ Engine hot.
^ Fault is permanent.

Fault sources:
^ Throttle Body (TB) incorrectly adjusted.
^ Faulty Idle Air Control (IAC) valve.

TESTING PROCEDURE








Checking Throttle Opening
^ START engine and allow to idle.
^ Display and read throttle angle.

Angle should be 9 - 14° at Closed Throttle Position (CTP).

If angle is correct:
- Check IAC valve connector.
If angle is incorrect:
- Adjust TB and throttle pulley.





Checking IAC Valve Connector
^ Clean and grease MFI module and IAC valve connectors.

If symptoms persist:
- Try with new IAC valve.