DTC EFI-444

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 V) to more than 3.5 V or less than 1.5 V, 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.