P1193

DTC Troubleshooting: P1193

DTC P1193: 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. Check the FTP SENSOR in the DATA LIST with the HDS.

Is there about 4.61 V or more?
YES - Go to step 3.

NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the FTP sensor and the PCM.


3. Turn the ignition switch to LOCK (0).

4. Disconnect the FTP sensor 3P connector.

5. Connect FTP sensor 3P connector terminals No. 1 and No. 3 with a jumper wire.

6. Turn the ignition switch to ON (II).

7. Check the FTP SENSOR in the DATA LIST with the HDS.

Is there about 4.61 V or more?
YES - Go to step 8.

NO - Go to step 22.






8. Turn the ignition switch to LOCK (0).

9. Remove the jumper wire from the FTP sensor 3P connector.

10. Turn the ignition switch to ON (II).

11. Measure the voltage between FTP sensor 3P connector terminals No. 1 and No. 2.

Is there about 5 V?
YES - Go to step 12.

NO - Go to step 17.






12. Turn the ignition switch to LOCK (0).

13. Jump the SCS line with the HDS.

14. Disconnect PCM connector A (44P).

15. Connect FTP sensor 3P connector terminal No. 3 to body ground with a jumper wire.






16. Check for continuity between PCM connector terminal A26 and body ground.

Is there continuity?
YES - Go to step 29.

NO - Repair open in the wire between the PCM (A26) and the FTP sensor, then go to step 24.






17. Turn the ignition switch to LOCK (0).

18. Jump the SCS line with the HDS.

19. Disconnect PCM connector A (44P).

20. Connect FTP sensor 3P connector terminal No. 1 to body ground with a jumper wire.






21. Check for continuity between PCM connector terminal A9 and body ground.

Is there continuity?
YES - Go to step 29.

NO - Repair open in the wire between the PCM (A9) and the FTP sensor, then go to step 24.






22. Turn the ignition switch to LOCK (0).

23. Replace the FTP sensor. Service and Repair

24. Reconnect all connectors.

25. Turn the ignition switch to ON (II).

26. Reset the PCM with the HDS.

27. Do the PCM idle learn procedure. ECM/PCM Idle Learn Procedure

28. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P1193 indicated?
YES - Check for poor connections or loose terminals at the FTP sensor and the PCM, then go to step 1.

NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.


29. Reconnect all connectors.

30. Update the PCM if it does not have the latest software, PCM Update or substitute a known-good PCM. Initial Inspection and Diagnostic Overview

31. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P1193 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, Initial Inspection and Diagnostic Overview then recheck. If the PCM was substituted, go to step 1.

NO - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM. Service and Repair If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.