DTC Troubleshooting
DTC Troubleshooting: P0453 (91)
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 inHg, 55 mmHg), or 4.7 V or more indicated?
YES -
Go to step 10.
NO -
Go to step 7.
7. Reinstall 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 HDS indicate FAILED?
YES -
Go to step 10.
NO -
If the HDS indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the FTP sensor and the PCM. If the HDS indicates NOT COMPLETED, keep idling until a result comes on.
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 inHg, 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 PCM connector A (49P).
19. Connect FTP sensor 3P connector terminal No. 3 to body ground with a jumper wire.
20. Check for continuity between PCM connector terminal A27 and body ground.
Is there continuity?
YES -
Go to step 34.
NO -
Repair an open in the wire between the PCM (A27) 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 PCM connector A (49P).
24. Connect FTP sensor 3P connector terminal No. 2 to body ground with a jumper wire.
25. Check for continuity between PCM connector terminal A39 and body ground.
Is there continuity?
YES -
Go to step 34.
NO -
Repair an open in the wire between the PCM (A39) 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 PCM with the HDS.
31. Do the PCM idle learn procedure PCM Idle Learn Procedure.
32. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0453 indicated?
YES -
Check for poor connections or loose terminals at the FTP sensor and the PCM, 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 HDS indicate PASSED?
YES -
Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 32, go to the indicated DTC's troubleshooting.
NO -
If the HDS indicates FAILED, check for poor connections or loose terminals at the FTP sensor and the PCM, then go to step 1. If the HDS indicates NOT COMPLETED, keep idling until a result comes on.
34. Reconnect all connectors.
35. Update the PCM if it does not have the latest software PCM Update, or substitute a known-good PCM.
36. Start the engine, and let it idle.
37. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0453 indicated?
YES -
Check for poor connections or loose terminals at the FTP sensor and the PCM. If the PCM was updated, substitute a known-good PCM, then go to step 36. If the PCM 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 HDS indicate PASSED?
YES -
If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM Service and Repair. If any other Pending or Confirmed DTCs were indicated in step 37, go to the indicated DTC's troubleshooting.
NO -
If the HDS indicates FAILED, check for poor connections or loose terminals at the FTP sensor and the PCM. If the PCM was updated, substitute a known-good PCM, then go to step 36. If the PCM was substituted, go to step 1. If the HDS indicates NOT COMPLETED, keep idling until a result comes on.