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 Temporary DTCs or 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 properly, check the pedal, the throttle cable, and the APP sensor individually. If you find a problem in one of them, replace the part(s) that caused the problem.
- Connect the HDS to the data link connector (DLC) (A) located behind the driver's side of the front console.
- Turn the ignition switch ON (II).
- Make sure the HDS communicates with the vehicle and the ECM. If it doesn't, go to the DLC circuit troubleshooting (see DLC CIRCUIT TROUBLESHOOTING ).
- Make sure the accelerator pedal is not pressed, then check the APP SENSOR in the DATA LIST with the HDS.
- If it is below 2%, the APP sensor is OK.
- If it is above 2%, adjust the throttle cable (see THROTTLE CABLE ADJUSTMENT ), then go to step 5.
- Make sure the accelerator pedal is not pressed, then check the APP SENSOR in the DATA LIST with the HDS.
- If it is below 2%, the APP sensor is OK.
- If it is above 2%, update the ECM if it does not have the latest software, or substitute a known-good ECM (see UPDATING THE ECM ), then go to step 6.
- Make sure the accelerator pedal is not pressed, then check the APP SENSOR in the DATA LIST with the HDS.
- If it is below 2%, the APP sensor is OK.
- If it is above 2%, replace the APP sensor (see APP SENSOR REPLACEMENT ), then go to step 1.