Trouble Code Conditions

3-4-3 FUEL PUMP RELAY





Trouble Code Conditions
- Diagnostic trouble code (DTC) EFI-343 Fuel pump (FP) relay is stored if there is a short-circuit to ground/supply voltage or an open-circuit in the fuel pump relay signal cable.

Substitute value(s)
- None.

Possible source(s)
Signal too high:
- Short-circuit to supply voltage in signal cable.
- Defective fuel pump relay.

Signal too low:
- Short-circuit to ground in signal cable.

Signal missing:
- Open-circuit in signal or power cable.
- Contact resistance in terminals.
- Defective fuel pump relay.

Fault symptom(s)
- None.





Other DTCs and Status Messages
Status message
- Select one of the following options to continue:

Alternative 1:
- Refer to: Signal Too High. Permanent Fault.

Alternative 2:
- Refer to: Signal Too Low. Permanent Fault.

Alternative 3:
- Refer to: Signal Missing: Permanent Fault.

Alternative 4:
- Refer to: Signal Too High: Intermittent Fault.

Alternative 5:
- Refer to: Signal Too Low. Intermittent Fault.

Alternative 6:
- Refer to: Signal Missing. Intermittent Fault.