DTC Troubleshooting
DTC Troubleshooting: P0452
DTC P0452:
FTP Sensor Circuit Low 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), or press the engine start/stop button to select the ON mode.
2. Clear the DTC with the HDS.
3. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
4. Remove the fuel fill cap.
5. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
6. Check the FTP SENSOR in the DATA LIST with the HDS.
Is about -7.3 kPa (-2.16 inHg, -55 mmHg), or 0.3 V or less indicated?
YES -
Go to step 10.
NO -
Go to step 7.
7. Reinstall 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 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), or press the engine start/stop button to select the OFF mode.
11. Disconnect the FTP sensor 3P connector.
12. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
13. Check the FTP SENSOR in the DATA LIST with the HDS.
Is about -7.3 kPa (-2.16 inHg, -55 mmHg), or 0.3 V indicated?
YES -
Go to step 20.
NO -
Go to step 14.
14. Measure the voltage between FTP sensor 3P connector terminal No. 1 and body ground.
Is there about 5 V?
YES -
Go to step 24.
NO -
Go to step 15.
15. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
16. Jump the SCS line with the HDS.
17. Disconnect PCM connector A (49P).
18. Connect FTP sensor 3P connector terminal No. 1 to body ground with a jumper wire.
19. Check for continuity between PCM connector terminal A25 and body ground.
Is there continuity?
YES -
Go to step 32.
NO -
Repair an open in the wire between the PCM (A25) and the FTP sensor, then go to step 26.
20. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
21. Jump the SCS line with the HDS.
22. Disconnect PCM connector A (49P).
23. Check for continuity between FTP sensor 3P connector terminal No. 2 and body ground.
Is there continuity?
YES -
Repair a short in the wire between the PCM (A39) and the FTP sensor, then go to step 26.
NO -
Go to step 32.
24. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
25. Replace the FTP sensor Service and Repair.
26. Reconnect all connectors.
27. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
28. Reset the PCM with the HDS.
29. Do the PCM idle learn procedure PCM Idle Learn Procedure.
30. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0452 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 31.
31. Monitor the OBD STATUS for DTC P0452 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 30, 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.
32. Reconnect all connectors.
33. Update the PCM if it does not have the latest software PCM Update, or substitute a known-good PCM.
34. Start the engine, and let it idle.
35. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0452 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 34. If the PCM was substituted, go to step 1.
NO -
Go to step 36.
36. Monitor the OBD STATUS for DTC P0452 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 35, 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 34. If the PCM was substituted, go to step 1. If the HDS indicates NOT COMPLETED, keep idling until a result comes on.