Trouble Code Conditions

2-4-2 TURBOCHARGER CONTROL VALVE SIGNAL





Condition

Diagnostic trouble code (DTC) EFI-242 is stored it there is a short-circuit to ground/voltage or an open-circuit in the Turbocharger (TC) Control Valve circuit.

Substitute Value

- Idle air trim disabled
- Fuel trim disabled
- Conditions for fuel shut-off changed.

Possible Source

Signal too High:

- Short-circuit to supply voltage in signal cable
- Defective turbocharger (TC) control valve.

Signal too Low:

- Short-circuit to ground in signal cable
- Defective turbocharger (TC) control valve.

Signal Missing:

- Open-circuit in signal or power cable
- Contact resistance in terminals
- Defective turbocharger (TC) control valve.

Fault Symptom(s)

- Improved or impaired performance due to excessively high or excessively low boost pressure.

OTHER DIAGNOSTIC TROUBLE CODES AND STATUS MESSAGES





Status Messages

Caution! In order to obtain the correct status message, it may be necessary to floor the accelerator pedal twice before reading off the diagnostic trouble code (DTC).

- Select one of the following options to continue.

Alternative 1:
- Proceed to Signal Too High. Permanent Fault section.

Alternative 2:
- Proceed to Signal Too Low. Permanent Fault section.

Alternative 3:
- Proceed to Signal Missing. Permanent Fault section.

Alternative 4:
- Proceed to Signal tOo High. Intermittent Fault section.

Alternative 5:
- Proceed to Signal Too Low. Intermittent Fault section.

Alternative 6:
- Proceed to Signal Missing. Intermittent Fault section.