DTC Troubleshooting
DTC Troubleshooting: P0453
DTC P0453: FTP Sensor Circuit High Voltage
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information. Initial Inspection and Diagnostic Overview
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Turn the ignition switch to LOCK (0).
4. Remove the fuel fill cap.
5. Turn the ignition switch to ON (II).
6. Check the FTP SENSOR in the DATA LIST with the HDS.
Is about 7.3 kPa (2.16 in.Hg, 55 mmHg), or 4.7 V or more indicated?
YES - Go to step 10.
NO - Go to step 7.
7. Install the fuel fill cap.
8. Start the engine, and let it idle.
9. Monitor the OBD STATUS for DTC P0453 in the DTCs MENU with the HDS.
Does the screen indicate FAILED?
YES - Go to step 10.
NO - If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the FTP sensor and the ECM. If the screen indicates NOT COMPLETED, go to step 4 and recheck.
10. Turn the ignition switch to LOCK (0).
11. Disconnect the FTP sensor 3P connector.
12. Connect FTP sensor 3P connector terminals No. 2 and No. 3 with a jumper wire.
13. Turn the ignition switch to ON (II).
14. Check the FTP SENSOR in the DATA LIST with the HDS.
Is about 7.3 kPa (2.16 in.Hg, 55 mmHg), or 4.7 V or more indicated?
YES - Go to step 15.
NO - Go to step 26.
15. Measure the voltage between FTP sensor 3P connector terminals No. 1 and No. 3.
Is there about 5 V?
YES - Go to step 21.
NO - Go to step 16.
16. Turn the ignition switch to LOCK (0).
17. Jump the SCS line with the HDS.
18. Disconnect ECM connector A (44P).
19. Connect FTP sensor 3P connector terminal No. 3 to body ground with a jumper wire.
20. Check for continuity between ECM connector terminal A9 and body ground.
Is there continuity?
YES - Go to step 34.
NO - Repair open in the wire between the ECM (A9) and the FTP sensor, then go to step 28.
21. Turn the ignition switch to LOCK (0).
22. Jump the SCS line with the HDS.
23. Disconnect ECM connector A (44P).
24. Connect FTP sensor 3P connector terminal No. 2 to body ground with a jumper wire.
25. Check for continuity between ECM connector terminal A26 and body ground.
Is there continuity?
YES - Go to step 34.
NO - Repair open in the wire between the ECM (A26) and the FTP sensor, then go to step 28.
26. Turn the ignition switch to LOCK (0).
27. Replace the FTP sensor. Service and Repair
28. Reconnect all connectors.
29. Turn the ignition switch to ON (II).
30. Reset the ECM with the HDS.
31. Do the ECM idle learn procedure. ECM Idle Learn Procedure
32. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0453 indicated?
YES - Check for poor connections or loose terminals at the FTP sensor and the ECM, then go to step 1.
NO - Go to step 33.
33. Monitor the OBD STATUS for DTC P0453 in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES - Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 32, go to the indicated DTC's troubleshooting.
NO - If the screen indicates FAILED, check for poor connections or loose terminals at the FTP sensor and the ECM, then go to step 1. If the screen indicates NOT COMPLETED, keep idling until a result comes on.
34. Reconnect all connectors.
35. Update the ECM if it does not have the latest software, ECM Update or substitute a known-good ECM. Initial Inspection and Diagnostic Overview
36. Start the engine, and let it idle.
37. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0453 indicated?
YES - Check for poor connections or loose terminals at the FTP sensor and the ECM. If the ECM was updated, substitute a known-good ECM, Initial Inspection and Diagnostic Overview then go to step 36. If the ECM was substituted, go to step 1.
NO - Go to step 38.
38. Monitor the OBD STATUS for DTC P0453 in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES - If the ECM was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM. Service and Repair If any other Temporary DTCs or DTCs were indicated in step 37, go to the indicated DTC's troubleshooting.
NO - If the screen indicates FAILED, check for poor connections or loose terminals at the FTP sensor and the ECM. If the ECM was updated, substitute a known-good ECM, Initial Inspection and Diagnostic Overview then go to step 36. If the ECM was substituted, go to step 1. If the screen indicates NOT COMPLETED, keep idling until a result comes on.