P1187
DTC P1187: FTT Sensor Circuit Low Voltage1. Reset the PCM.
2. Turn the ignition switch ON (II).
Is DTC P1187 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 at the PCM.
3. Turn the ignition switch OFF.
4. Disconnect the FTT sensor 2P connector.
5. Measure resistance between FTT sensor 2P connector terminals No.1 and No.2.
Is the resistance OK (see the graph)?
YES - Go to step 6.
NO - Replace the FTT sensor.
6. Turn the ignition switch OFF.
7. Disconnect PCM connector E (31P).
8. Check for continuity between FTT sensor 2P connector terminal No.2 and body ground.
Is there continuity?
YES - Repair short in the wire between PCM (E21) and FTT sensor.
NO - Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck.
If the symptom/indication goes away with a known-good PCM, replace the original PCM.