Low Idling Speed

LOW IDLING SPEED

Preconditions
^ DTCs absent.
^ Engine is hot.
^ Fault is permanent.

Fault Sources
^ Throttle Body (TB) incorrectly adjusted.
^ Detective Idle Air Control (IAC) Valve.

TESTING PROCEDURE





Checking the Throttle Opening
^ START the engine and let it run at idling speed.
^ Read off the throttle angle.

Throttle angle should be 3 - 8° with the throttle closed.

If the value is OK:
- Check the IAC valve's connector.
If the reading is incorrect:
- Adjust the TB and control pulley.





Checking the IAC Valve's Connector
^ Clean and grease the ECM's and IAC valve's connector.

If the symptom remains:
- Test with a new IAC valve.