Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-9540

Condition




The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers that the pulse width modulation (PWM) signal for the accelerator pedal (AP) position sensor deviates from the basic frequency of 200 Hz by more than ±70 Hz.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.

Substitute value
The accelerator pedal (AP) does not function when the brake pedal is pressed.

Possible source
- Contact resistance or oxidation in the terminals between the accelerator pedal (AP) position sensor and the engine control module (ECM)
- Open-circuit, short-circuit to ground or supply voltage in the signal cable
- Damaged accelerator pedal (AP) position sensor.

Fault symptom[s]
- Poor accelerator pedal (AP) response.