Diagnostic Trouble Code (DTC) Information ECM-P022082

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 control module checks the communication with the Central electronic module (CEM).

The diagnostic trouble code (DTC) is stored if the control module detects that:

No communication with the Central electronic module (CEM).

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.

Fig 1: Identifying Accelerator Pedal Position Sensor

Courtesy of VOLVO CARS CORPORATION

Substitute Value

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

Open-circuit in the communication cable.
Short-circuit to ground in the communication cable.
Short-circuit to supply voltage in the communication cable.
Contact resistance or oxidation in the terminals.
Open-circuit in terminals.
Short-circuit in connections.

Fault symptom[s]

Message in information display
Accelerator pedal ignored during braking