Checking the status

HINT: If diagnostic trouble code (DTC) ECM-9520 or ECM-9530 is stored in the engine control module (ECM), these diagnostic trouble codes (DTCs) must be fault-traced first. 

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition on.

  Check whether the fault is permanent or intermittent. Read off the analog signal and the pulse width modulation (PWM) signal from the accelerator pedal (AP) position sensor.

  Check that the difference between the signals is not more than approximately 4%. Check that the value is between 6-9% with unaffected accelerator pedal (AP) and between 85-90% with the accelerator pedal (AP) fully depressed.

  Check the signals throughout the measurement range of the accelerator pedal (AP) position sensor (from completely released to completely depressed). Make the check using slow movements of the accelerator pedal (AP).

  The fault is intermittent if the signals are correct.

  HINT: A defective accelerator pedal (AP) position sensor is indicated if any of the returned signals deviates at a specific accelerator pedal (AP) angle. 

  Other information 

  • See Information about combined diagnostic trouble codes (DTCs)
  Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

  Courtesy of VOLVO CARS OF NORTH AMERICA.

• Continue 

  Refer to Checking components