P1188
DTC P1188: FTT Sensor Circuit High 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. Check the FTT SENSOR in the DATA LIST with the HDS.
Is about -40 ° F(-40 °C) or less, or 4.92 V or more indicated?
YES - Go to step 3.
NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the FTT sensor and the PCM.
3. Turn the ignition switch OFF.
4. Disconnect the FTT sensor 2P connector.
5. Connect FTT sensor 2P connector terminals No. 1 and No. 2 with a jumper wire.
6. Turn the ignition switch ON (II).
7. Check the FTT SENSOR in the DATA LIST with the HDS.
Is about - 40 °F(-40 ° C) or less, or 4.92 V or more indicated?
YES - Go to step 8.
NO - Go to step 22.
8. Turn the ignition switch OFF.
9. Remove the jumper wire from the FTT sensor 2P connector.
10. Turn the ignition switch ON (II).
11. Measure voltage between FTT sensor 2P connector terminal No. 2 and body ground.
Is there about 5 V?
YES - Go to step 12.
NO - Go to step 17.
12. Turn the ignition switch OFF.
13. Jump the SCS line with the HDS.
14. Disconnect PCM connector A (44P).
15. Connect FTT sensor 2P connector terminal No. 1 to body ground with a jumper wire.
16. 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 FTT sensor, then go to step 24.
17. Turn the ignition switch OFF.
18. Jump the SCS line with the HDS.
19. Disconnect PCM connector A (44P).
20. Connect FTT sensor 2P connector terminal No. 2 to body ground with a jumper wire.
21. Check for continuity between PCM connector terminal A32 and body ground.
Is there continuity?
YES - Go to step 29.
NO - Repair open in the wire between the PCM (A321 and the FTT sensor, then go to step 24.
22. Turn the ignition switch OFF.
23. Replace the FTT sensor. Reconnect all connectors.
25. Turn the ignition switch ON (II).
26. Reset the PCM with the HDS.
27. Do the PCM idle learn procedure.
28. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P1188 indicated?
YES - Check for poor connections or loose terminals at the FTT 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, or substitute a known-good PCM.
31. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P1188 indicated?
YES - Check for poor connections or loose terminals at the FTT sensor and the PCM. If the PCM was updated, substitute a known-good PCM, 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. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.