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2003 CR-V - DTC Troubleshooting: P0661 (107)

DTC P0661: IMRC Valve Position Sensor Circuit Low Voltage 1. 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 IMRC valve position sensor and at the ECM/PCM.

3. Turn the ignition switch OFF. 4. Disconnect the IMRC valve position sensor 3P connector. 5. Turn the ignition switch ON (II). 6. Measure voltage between 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 IMRC valve position sensor 3P connector terminals No. 2 and No. 3.

Is there about 3.2 k: at room temperature?

YES - Go to step 9. NO - Replace the IMRC valve position sensor.

American Honda Motor Co., Inc.

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9. Measure resistance between IMRC valve position sensor 3P connector terminals No. 1 and No. 2.

Is there about 9.5 k: at room temperature?

YES - Go to step 10. NO - Replace the IMRC valve position sensor.

American Honda Motor Co., Inc.

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10. Disconnect ECM/PCM connector A (31P). 11. At the wire harness side, check for continuity between 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 (A8) and the IMRC valve position sensor. NO - Go to step 12.

American Honda Motor Co., Inc.

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12. Connect ECM/PCM connector terminal A8 to body ground with a jumper wire.

13. At the wire harness side, check for continuity between IMRC valve position sensor 3P connector terminal No. 2 and body ground. Is there continuity?

YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM.

NO - Repair open in the wire between the ECM/PCM (A8) and the IMRC valve position sensor.

American Honda Motor Co., Inc.

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14. Measure voltage between ECM/PCM connector terminals A11 and A21.

Is there about 5 V?

YES - Repair open in the wire between the ECM/PCM (A21) and the IMRC valve position sensor.

NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM.

American Honda Motor Co., Inc.

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