Throttle Position Sensor Signal Inspection
NOTE:
- This procedure is to inspect the abnormalities of the throttle position sensor full closed position.
- Other failures than full closed position will store a DTC, therefore the procedure to inspect them are not included in this procedure.
- Check for Temporary DTCs or DTCs with the HDS before this procedure. If there are any DTCs indicated, troubleshoot them first, then do this procedure.
- Press the accelerator pedal several times, and check the operation. If it does not operate properly check the accelerator pedal, the throttle cable, and the throttle linkage individually. If you fined a problem in one of them, replace the parts that caused the problem.
- Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.
- Turn the ignition switch ON (II).
- Make sure the accelerator pedal is not pressed and check the REL TP SENSOR in the DATA LIST with the HDS.
- If it is below 10%, the throttle position sensor is OK.
- If it is above 10%, adjust the throttle cable, K20A2/K20Z1 engines (see THROTTLE CABLE ADJUSTMENT ), K20A3 engine (see THROTTLE CABLE ADJUSTMENT ), then go to step 4.
- Make sure the accelerator pedal is not pressed and check the REL TP SENSOR in the DATA LIST with the HDS.
- If it is below 10%, the throttle position sensor is OK.
- If it is above 10%, update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see HOW TO UPDATE THE ECM/PCM ), then go to step 5.
- Make sure the accelerator pedal is not pressed and check the REL TP SENSOR in the DATA LIST with the HDS.
- If it is below 10%, the throttle position sensor is OK.
- If it is above 10%, replace the throttle body assembly, K20A2/K20Z1 engines (see THROTTLE BODY REMOVAL/INSTALLATION ), K20A3 engine (see K20A3 ENGINE ), then go to step 1.