Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-P012024

Condition
The engine control module (ECM) checks the pulse width modulation (PWM) signal and the analog signal from the accelerator pedal (AP) position sensor. The analog signal is directly connected to the Central electronic module (CEM) and the signal is transmitted via CAN communication to the Engine control module (ECM). The pulse width modulation (PWM) signal is directly connected to the engine control module (ECM).
The PWM signal is used to determine the current accelerator pedal position in a fault free system.
The engine control module (ECM) checks the PWM signal.
The diagnostic trouble code (DTC) is stored if the control module detects that:
- The PWM signal is too high.
- Incorrect value lasts longer than 16 seconds.
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Ignition switch position II.

Note! The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met.





Substitute value
- The control module uses analog signals (via CAN).
- The control module uses the accelerator pedal position corresponding to the released position when the brake pedal is depressed at the same time.

Possible source
- Short-circuit to supply voltage in the signal cable.
- Open-circuit in the signal cable.
- Open-circuit in the power supply (12V) to the accelerator pedal (AP) position sensor.
- Open-circuit in the ground lead.
- Damaged accelerator pedal (AP) position sensor.

Fault symptom[s]
- Message in information display
- Accelerator pedal ignored during braking