DTC 2-3-3 Long Term Idle Air Trim

2-3-3 IDLE AIR TRIM

Precondition for DTC
^ If the idle air trim is allowed to raise: [upper limit: 22 kg/h (48.5 lbs/h)] or lower: [lower limit: 8 kg/h (17.6 lbs/h)] the volume of air through the Idle Air Control (IAC) valve by too much to maintain the correct idling speed, DTC 2-3-3 is set.

Substitute values
^ None.

Fault sources
^ Upper limit:
- Clogged Air Cleaner (ACL) or air intake.
- Contact resistance in the connectors.
- Wrongly adjusted Throttle Body (TB).
- Defective IAC valve.

^ Lower limit:
- Air leakage.
- Contact resistance in connectors.
- Wrongly adjusted Throttle Body (TB).
- Defective IAC valve.

Fault symptoms
^ Idling speed too high or too low.