Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information EFI-223, EFI-245

EFI-223 Idle air control (IAC) valve opening, signal EFI-245 Idle air control (IAC) valve closing, signal

Condition




Diagnostic trouble code (DTC) EFI-223/EFI-245 is stored if the engine control module (ECM) registers a fault in the cable from the idle air control (IAC) valve opening/closing coil.

Substitute value
- idle air trim disabled
- fuel shut-off conditions changed
- output signals to the coils are regulated with a fixed value depending on the cause of the fault
- leakage diagnostic is disabled.

Possible source

Signal too high:
- short-circuit to supply voltage in the signal cable
- defective idle air control (IAC) valve.

Signal too low:
- opening and closing coil signal cables short-circuited to each other
- defective fuse 11B/2 (1998-)
- open-circuit in power cable
- short-circuit to ground in signal cable
- defective idle air control (IAC) valve
- contact resistance in terminals.

Signal missing:
- open-circuit in signal cable
- defective idle air control (IAC) valve
- contact resistance in terminals.

Fault symptom[s]
- idling speed low or high.