DTC ECM-9540

Condition







Diagnostic trouble code (DTC) ECM-9540 is stored in the engine control module (ECM) if the engine control module (ECM) registers a fault in the 5 V power supply to the accelerator pedal (AP) position sensor.

Substitute value
- slower throttle opening than requested throttle opening
- throttle closure when braking

Possible source

Signal too high
- short-circuit to supply voltage in the signal cable

Signal too low
- short-circuit to ground in the signal cable
- open-circuit in signal cable

Fault symptom[s]
- general orange warning lamp lit
- poor accelerator pedal (AP) response.