High Idling Speed

FAULT TRACING INFORMATION

Conditions
^ DTCs absent.
^ Engine warm.
^ Fault permanent.

Fault Sources
^ Throttle cable binding.
^ Throttle Body (TB) badly adjusted.
^ Air leakage.
^ Defective Idle Air Control (IAC) Valve.

TESTING PROCEDURE





Check Throttle Cable
^ Check throttle cable Is not binding or slack.
^ Continue with: Check Throttle Opening, section below.





Check Throttle Opening
^ START engine and allow to idle.
^ Read off value of throttle angle.

Throttle angle should read 9.5° - 11.5° at Closed Throttle Position (CTP).

If value OK:
- Proceed to: Check Air Leakage in Intake System, section below.
If value differs:
- Adjust TB and pulley.





Check Air Leakage in Intake System
^ Check for air leakage.

If no air leakage detected:
- Proceed to: Check Air Leakage in Exhaust System, section below.
If air leakage detected:
- Fix as necessary.





Check Air Leakage in Exhaust System
^ Check for air leakage.

If no air leakage detected:
- Proceed to: Check IAC Valve Connector, section below.
If air leakage detected:
- Fix as necessary.





Check IAC Valve Connector
^ Clean and grease ECM and IAC valve connector.

If symptom persists:
- Test with a new IAC valve.