P0661
DTC P0661: IMT (IMRC) Valve Position Sensor Circuit Low Voltage1. Reset the ECM/PCM.
2. Turn the ignition switch ON (II).
Is DTC P0661 indicated?
YES - Go to step 3.
NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the IMT (IMRC) valve position sensor and at the ECM/PCM.
3. Turn the ignition switch OFF.
4. Disconnect the IMT (IMRC) valve position sensor 3P connector.
5. Turn the ignition switch ON (II).
6. Measure voltage between IMT (IMRC) valve position sensor 3P connector terminals No.1 and No.3.
Is there about 5 V?
YES - Go to step 7.
NO - Go to step 14.
7. Turn the ignition switch OFF.
8. At the sensor side, measure resistance between IMT (IMRC) valve position sensor 3P connector terminals No.2 and No.3.
Is there about 3.2 kOhm at room temperature?
YES - Go to step 9.
NO - Go to step 15.
9. Measure resistance between IMT (IMRC) valve position sensor 3P connector terminals No.1 and No.2.
Is there about 9.5 kOhm at room temperature?
YES - Go to step 10.
NO - Go to step 15.
10. Disconnect ECM/PCM connector A (31P).
11. At the wire harness side, check for continuity between IMT (IMRC) valve position sensor 3P connector terminal No.2 and body ground.
Is there continuity?
YES - Repair short in the wire between the ECM/PCM (B22) and the IMT (IMRC) valve position sensor, then go to step 16.
NO - Go to step 12.
12. Connect ECM/PCM connector terminal B22 to body ground with a jumper wire.
13. At the wire harness side, check for continuity between IMT (IMRC) valve position sensor 3P connector terminal No.2 and body ground.
Is there continuity?
YES - Go to step 21.
NO - Repair open in the wire between the ECM/PCM (B22) and the IMT (IMRC) valve position sensor, then go to step 16.
14. Measure voltage between ECM/PCM connector terminals A21 and A24.
Is there about 5 V?
YES - Repair open in the wire between the ECM/PCM (A21) and the IMT (IMRC) valve position sensor, then go to step 16.
NO - Go to step 21.
15. Replace the IMT (IMRC) valve position sensor.
16. Reconnect all connectors.
17. Turn the ignition switch ON (II).
18. Reset the ECM/PCM with the HDS.
19. Do the ECM/PCM idle learn procedure.
20. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P0661 is indicated, check for poor connections or loose terminals at the IMT (IMRC) valve position sensor and the ECM/PCM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO - Troubleshooting is complete.
21. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM.
22. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P0661 is indicated, check for poor connections or loose terminals at the IMT (IMRC) valve position sensor and the ECM/PCM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO - If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM.