Operation CHARM: Car repair manuals for everyone.

Signal Too Low. Intermittent Fault





Checking Cables and Terminals
- Check idle air control (IAC) valve and engine control module (ECM) connectors for contact resistance and oxidation and loose connections.
- Check cable between main relay (2/32) terminal 3 and idle air control valve terminal 2 for an intermittent open-circuit.
- Check cable between idle air control valve terminal 3 and control module # A11 for an intermittent short-circuit to supply voltage.
- Proceed to: Fault-tracing Information section below.

Fault-tracing Information
For intermittent faults, fault-tracing is not followed by a verification because the fault is not present at this moment.

- Do you want to repeat fault-tracing?

Yes:
^ Proceed to: Checking Cables and Terminals section above.

No:
^ Operation done.