DTC Troubleshooting
DTC Troubleshooting: P0452, 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. 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/PCM. If the screen 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 or less 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 ECM/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 ECM/PCM connector terminal A25 and body ground.
Is there continuity?
YES -
Go to step 32.
NO -
Repair open in the wire between the ECM/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 ECM/PCM connector A (49P).
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/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; without SH-AWD Service and Repair, with SH-AWD 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 ECM/PCM with the HDS.
29. Do the ECM/PCM idle learn procedure ECM/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 ECM/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 screen 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 screen indicates FAILED, check for poor connections or loose terminals at the FTP sensor and the ECM/PCM, then go to step 1. If the screen indicates NOT COMPLETED, keep idling until a result comes on.
32. Reconnect all connectors.
33. Update the ECM/PCM if it does not have the latest software ECM/PCM Update, or substitute a known-good ECM/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 ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM, then go to step 34. If the ECM/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 screen indicate PASSED?
YES -
If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/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 screen indicates FAILED, check for poor connections or loose terminals at the FTP sensor and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM, then go to step 34. If the ECM/PCM was substituted, go to step 1. If the screen indicates NOT COMPLETED, keep idling until a result comes on.