P0452
DTC P0452: FTP Sensor Circuit Low VoltageNOTE: 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. Clear the DTC with the HDS.
3. Turn the ignition switch OFF.
4. Remove the fuel fill cap.
5. Turn the ignition switch 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 0.3 V or less indicated?
YES - Go to step 10.
NO - Go to step 7.
7. Install the fuel fill cap.
8. Start the engine.
9. Monitor the OBD STATUS for DTC P0452 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 OFF.
11. Disconnect the FTP sensor 3P connector.
12. Turn the ignition switch ON (II).
13. Check the FTP SENSOR in the DATA LIST with the HDS.
Is about 7.3 kPa (2.15 in.Hg. 54.7 mmHg) or 4.90 V or more indicated?
YES - Go to step 24.
NO - Go to step 14.
14. Measure voltage between FTP sensor 3P connector terminal No. 1 and body ground.
Is thereabout 5 V?
YES - Go to step 20.
NO - Go to step 15.
15. Turn the ignition switch OFF.
16. Jump the SCS line with the HDS.
17. Disconnect ECM connector A (44P).
18. Connect FTP sensor 3P connector terminal No. 1 to body ground with a jumper wire.
19. Check for continuity between ECM connector terminal A19 and body ground.
Is there continuity?
YES - Go to step 32.
NO - Repair open in the wire between the ECM (A19) and the FTP sensor, then go to step 26.
20. Turn the ignition switch OFF.
21. Jump the SCS line with the HDS.
22. Disconnect ECM connector A (44P).
23. Check for continuity between FTP sensor 3P connector terminal No. 2 and body ground.
Is there continuity?
YES - Repair short in the wire between the ECM (A26) and the FTP sensor, then go to step 26.
NO - Go to step 32.
24. Turn the ignition switch OFF.
25. Replace the FTP sensor.
26. Reconnect all connectors.
27. Turn the ignition switch ON (II).
28. Reset the ECM with the HDS.
29. Do the ECM idle learn procedure.
30. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P0452 is indicated, check for poor connections or loose terminals at the FTP sensor and the ECM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO - Go to step 31.
31. Monitor the OBD STATUS for DTC P0452 in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES - Troubleshooting is complete.
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, go to step 29 and recheck.
32. Update the ECM if it does not have the latest software, or substitute a known-good ECM.
33. Start the engine.
34. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0452 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, then go to step 33. If the ECM was substituted, go to step 1.
NO - If no Temporary DTCs or DTCs are indicated, go to step 35. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
35. Monitor the OBD STATUS for DTC P0452 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.
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, then go to step 33. If the ECM was substituted, go to step 1. If the screen indicates NOT COMPLETED, let the engine idle until a result comes on.