App Sensor Signal: Inspection

NOTE: 

• This procedure checks the APP sensor in its fully closed position. In any other position, the APP sensor stores DTCs which are covered in other troubleshooting procedures.
• Check for Pending or Confirmed DTCs with the HDS before doing this procedure. If any DTCs are indicated, troubleshoot them first, then do this procedure.
• Press the accelerator pedal several times to check its operation. If it does not operate smoothly, check the pedal. If you find a problem, replace the Accelerator Pedal Module - Removal and Installation .

1. HDS - Connect 
2. APP Sensor Signal - Inspect

   1. Make sure the accelerator pedal is not pressed, then check the APP SENSOR in the DATA LIST with the HDS. If it is 0 %, the APP sensor is OK. If it is not 0 %, update the PCM Update  (if it does not have the latest software) or substitute a known-good PCM - Refer to: PCM (6-Speed A/T), ('16-'18 9-Speed A/T) - Removal and Installation or PCM (9-Speed A/T) - Removal and Installation (2019 2020 2021) then go to step 2.. 2. Make sure the accelerator pedal is not pressed, then check the APP SENSOR in the DATA LIST with the HDS. If it is 0 %, the APP sensor is OK. If it is not 0 %, replace the Accelerator Pedal Module - Removal and Installation , then go to step 1.