P0122

DTC P0122: TP Sensor Circuit Low Voltage (2005-2006 models)

NOTE: Information marked with an asterisk (*) applies to K20Z1 engine.

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

Is there about 0.5 V when the throttle is fully closed and about 4.5 V when the throttle is fully opened?

YES - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the TP sensor and the ECM/PCM.

NO - Go to step 3.

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




6. On the wire harness side, measure voltage between TP sensor 3P connector terminals No. 1 and No. 3.

Is there about 5 V?

YES - Go to step 7.

NO - Go to step 15.

7. Turn the ignition switch OFF.




8. On the sensor side, measure resistance between TP sensor 3P connector terminals No. 2 (No. 1)* and No. 3 (No. 2)* with the throttle fully closed.

Is there about 0.5 - 0.9 kOhms?

YES - Go to step 9.

NO - Go to step 16.




9. On the sensor side, measure resistance between TP sensor 3P connector terminals No. 1 (No. 2)* and No. 2 (No. 3)* with the throttle fully closed.

Is there about 5.0 kOhms?

YES - Go to step 10.

NO - Go to step 16.

10. Jump the SCS line with the HDS.
11. Disconnect ECM/PCM connector A (31P).




12. On the wire harness side, check for continuity between TP sensor 3P connector terminal No. 2 and body ground.

Is there continuity?

YES - Repair short in the wire between the TP sensor and the ECM/PCM (A29), then go to step 17.

NO - Go to step 13.




13. Connect ECM/PCM connector terminal A29 to body ground with a jumper wire.




14. On the wire harness side, check for continuity between TP sensor 3P connector terminal No. 2 and body ground.

Is there continuity?

YES - Go to step 22.

NO - Repair open in the wire between the TP sensor and the ECM/PCM (A29), then go to step 17.




15. Measure voltage between ECM/PCM connector terminals A20 and A23.

Is there about 5 V?

YES - Repair open in the wire between the ECM/PCM (A20) and the TP sensor, then go to step 18.

NO - Go to step 22.

16. Replace the throttle body, K20Z1 engine, K20A3 engine.
17. Reconnect all connectors.
18. Turn the ignition switch ON (II).
19. Reset the ECM/PCM with the HDS.
20. Do the ECM/PCM idle learn procedure.
21. Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs indicated?

YES - If DTC P0122 is indicated, check for poor connections or loose terminals at the TP sensor and the ECM/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.

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

Are any Temporary DTCs or DTCs indicated?

YES - If DTC P0122 is indicated, check for poor connections or loose terminals at the TP sensor and the ECM/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 ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM.