P2127

DTC P2127: APP Sensor B (Throttle Position Sensor E) Circuit Low Voltage (2006 model)

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 B in the DATA LIST with the HDS.

Is there about 0.1 V or less?

YES - Go to step 3.

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

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




6. At the wire harness side, measure voltage between APP sensor 6P connector terminals No.1 and No.2.

Is there about 5 V?

YES - Go to step 7.

NO - Go to step 15.

7. Turn the ignition switch OFF.




8. At the sensor side, measure resistance between APP sensor 6P connector terminals No.2 and No.3 with the throttle fully closed.

Is there about 0.35 - 0.45 kOhms at room temperature?

YES - Go to step 9.

NO - Go to step 16.




9. At the sensor side, measure resistance between APP sensor 6P connector terminals No.1 and No.3 with the throttle fully closed.

Is there about 5.9 - 7.3 kOhms at room temperature?

YES - Go to step 10.

NO - Go to step 16.

10. Jump the SCS line with the HDS.
11. Disconnect ECM/PCM connector D (17P).




12. At the wire harness side, check for continuity between APP sensor 6P connector terminal No.3 and body ground.

Is there continuity?

YES - Repair short in the wire between APP sensor B and the ECM/PCM (D9), then go to step 17.

NO - Go to step 13.




13. Connect ECM/PCM connector terminal D9 to body ground with a jumper wire.




14. At the wire harness side, check for continuity between APP sensor 6P connector terminal No.3 and body ground.

Is there continuity?

YES - Go to step 22.

NO - Repair open in the wire between APP sensor B and the ECM/PCM (D9), then go to step 17.




15. Measure voltage between ECM/PCM connector terminals C12 and C14.

Is there about 5 V?

YES - Repair open in the wire between the ECM/PCM (C14) and APP sensor B, then go to step 17.

NO - Go to step 22.

16. Replace the APP sensor.
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 P2127 is indicated, check for poor connections or loose terminals at APP sensor B 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 P2127 is indicated, check for poor connections or loose terminals at APP sensor B 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.