P2123

DTC P2123: APP Sensor A (Throttle Position Sensor D) Circuit High Voltage

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.

1. Turn the ignition switch ON (II).
2. Check APP SENSOR A in the DATA LIST with the HDS.

Is there about 4.9 V or more?

YES - Go to step 3.

NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at APP sensor A and the PCM.

3. Turn the ignition switch OFF.
4. Disconnect the APP sensor 6P connector.
5. Turn the ignition switch ON (II).




6. Measure voltage between APP sensor 6P connector terminals No. 2 and No. 3.

Is there about 5 V?

YES - Go to step 8.

NO - Go to step 7.




7. Measure voltage between PCM connector terminals D2 and D7.

Is there about 5 V?

YES - Repair short in the wire between the PCM (D7) and APP sensor A, then go to step 10.

NO - Go to step 14.

8. Turn the ignition switch OFF.
9. Replace the accelerator pedal module.
10. Turn the ignition switch ON (II).
11. Reset the PCM with the HDS.
12. Do the idle learn procedure.
13. Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs indicated?

YES - If DTC P2123 is indicated, check for poor connections or loose terminals at APP sensor A and the PCM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.

NO - Troubleshooting is complete.

14. Update the PCM if it does not have the latest software, or substitute a known-good PCM.
15. Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs indicated?

YES - If DTC P2123 is indicated, check for poor connections or loose terminals at APP sensor A and the PCM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.

NO - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM.