Checking Throttle Position and Idle Air Control Valve

Checking The Throttle Angle
- Start the engine and idle it.
- Select scrolling values.
- Read off the throttle angle.
- Throttle angle should be 0° at closed throttle position (CTP).

If reading is OK:
^ Proceed to test step below.

If reading is incorrect:
^ Try a new throttle body.





Checking Throttle Body
- Clean throttle body.
- Do the fault symptoms persist?

Yes:
^ Proceed to test step below.

No:
^ Operation done.





Cleaning Idle Air Control Valve Connector
- Clean and grease engine control module (ECM) and idle air control (IAC) valve connectors.
- Do the fault symptoms persist?

Yes:
^ Try a new idle air control valve.

No:
^ Operation done.