Trouble Code Conditions

4-4-4 ACCELEROMETER SIGNAL





Trouble Code Conditions
- If the engine control module (ECM) senses that the DC signal from the accelerometer has changed its mean setting (2.5 Volts) to more than 3.5 Volts or less than 1.5 Volts, diagnostic trouble code (DTC) EFI-444 is stored.

Substitute value(s)
- None.

Possible source(s)
Signal too high:
- Short-circuit to supply voltage in signal cable.
- Open-circuit in signal cable, ground lead or voltage cable.
- Short-circuit to ground or supply voltage in power cable
- Contact resistance in terminals.
- A/C pressure sensor power cable short-circuit to ground.
- Short-circuit to ground in fuel tank pressure sensor power cable.
- Defective accelerometer.

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

Fault symptom(s)
- Can post misfire diagnostic trouble codes (DTCs) when travelling on an uneven road.





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 Too High. Intermittent Fault.

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