DTC EFI-444

4-4-4 ACCELEROMETER SIGNAL





Condition

Diagnostic Trouble Code (DTC) EFI-444 is stored if the Engine Control Module (ECM) senses that the DC signal from the accelerometer has changed its mean setting (2.5 Volts) to above 3.5 Volts or less than 1.5 Volts.

Substitute Value

- None.

Possible Source

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
- Short-circuit to ground in air conditioning (A/C) pressure sensor
- Short-circuit to ground in fuel tank pressure sensor power cable
- Short-circuit to ground in atmospheric pressure sensor power cable
- Defective air conditioning (A/C) pressure sensor
- Defective atmospheric pressure sensor
- Defective fuel tank pressure sensor
- 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.