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DTC P2183: ECT Sensor 2 Circuit Range/Performance Problem Honda Odyssey III

Testing & Diagnostics 5 illustrations ~1588 words

Note. If DTC P0111 is stored at the same time as DTC P2183, troubleshoot DTC P0111 first, then recheck for DTC P2183.

  1. Check for poor connections or loose terminals at ECT sensor 1 and ECT sensor 2. Are the connections and terminals OK? YES - Go to step 2. NO - Repair the connectors or terminals, then go to step 27 .
  2. Turn the ignition switch ON (II).
  3. Check for Temporary DTCs or DTCs with the HDS. Are DTC P1116 and P2183 indicated at the same time? YES - Go to step 15 . NO - Go to step 4.
  4. Start the engine, and let it idle 10 minutes.
  5. Check ECT SENSOR 2 in the DATA LIST with the HDS. Is about 131°F (55°C) or less, or 1.50 V or more indicated? YES - Replace ECT sensor 2 (see «ECT SENSOR 1 REPLACEMENT»(ref-220946-S15107920842006022100000) ), then go to step 27 . NO - Go to step 6.
  6. Turn the ignition switch OFF.
  7. Drain the coolant (see «COOLANT REPLACEMENT»(ref-220943-S33824314882006022100000) ).
  8. Remove ECT sensor 2 (see «ECT SENSOR 1 REPLACEMENT»(ref-220946-S15107920842006022100000) ).
  9. Allow ECT sensor 2 to cool to 77°F (25°C).
  10. Note the outside temperature.
  11. Connect ECT sensor 2 to the 2P connector. Do not install it on the engine.
  12. Turn the ignition switch ON (II).
  13. Note the value of ECT SENSOR 2 quickly in the DATA LIST with the HDS.
  14. Compare value of ECT SENSOR 2 and the outside temperature. Does ECT SENSOR 2 differ 5.4°F (3°C) or more? YES - Replace ECT sensor 2 (see «ECT SENSOR 1 REPLACEMENT»(ref-220946-S15107920842006022100000) ), then go to step 27 . NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the PCM.
  15. Start the engine, and let it idle 10 minutes.
  16. Check ECT SENSOR 1 in the DATA LIST with the HDS. Is about 118 °F (48 °C) or less, or 1.75 V or higher indicated? YES - Replace ECT sensor 1 (see «ECT SENSOR 1 REPLACEMENT»(ref-220946-S15107920842006022100000) ), then go to step 27 . NO - Go to step 17.
  17. Let the engine idle 10 minutes.
  18. Check ECT SENSOR 2 in the DATA LIST with the HDS. Is about 131°F (55°C) or less, or 1.50 V or more indicated? YES - Replace ECT sensor 2 (see «ECT SENSOR 1 REPLACEMENT»(ref-220946-S15107920842006022100000) ), then go to step 27 . NO - Go to step 19.
  19. Turn the ignition switch OFF.
  20. Drain the coolant (see «COOLANT REPLACEMENT»(ref-220943-S33824314882006022100000) ).
  21. Remove ECT sensor 1 (see «ECT SENSOR 1 REPLACEMENT»(ref-220946-S15107920842006022100000) ), and ECT sensor 2 (see «ECT SENSOR 1 REPLACEMENT»(ref-220946-S15107920842006022100000) ).
  22. Allow each sensors to cool to 77°F (25°C).
  23. Note the ambient temperature.
  24. Connect ECT sensor 1 to the 2P connector, and ECT sensor 2 to the 2P connector. Do not install them on the engine.
  25. Note the value of ECT SENSOR 1 and ECT SENSOR 2 quickly in the DATA LIST with the HDS.
  26. Compare the value of ECT SENSOR 1 and the outside temperature, and the value of ECT SENSOR 2 and the ambient temperature individually. Does one of the sensor differ more than 5.4°F (3°C) from the ambient temperature? YES - Replace the sensor that differed more than 5.4°F (3°C) from the ambient temperature, then go to step 27. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the PCM.
  27. Turn the ignition switch ON (II).
  28. Reset the PCM with the HDS.
  29. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-220951-S17680691112006022100000) ).
  30. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P2183 is indicated, check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting. NO - Troubleshooting is complete.

Scheme 104

Scheme 104: DTC P2184: ECT Sensor 2 Circuit Low Voltage
Scheme 104: DTC P2184: ECT Sensor 2 Circuit Low Voltage
  1. Turn the ignition switch ON (II).
  2. Check ECT SENSOR 2 in the DATA LIST with the HDS. Is about 356°F (180°C) or more, or 0.08 V or less indicated? YES - Go to step 3. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at ECT sensor 2 and the PCM.
  3. Turn the ignition switch OFF.
  4. Disconnect ECT sensor 2 2P connector.
  5. Turn the ignition switch ON (II).
  6. Check ECT SENSOR 2 in the DATA LIST with the HDS. Is about 356°F (180°C) or more, or 0.08 V or less indicated? YES - Go to step 7. NO - Go to step 11 .
  7. Turn the ignition switch OFF.
  8. Jump the SCS line with the HDS.
  9. Disconnect PCM connector C (44P).
  10. Check for continuity between ECT sensor 2 2P connector terminal No. 1 and body ground. Is there continuity? YES - Repair short in the wire between ECT sensor 2 and the PCM (C36), then go to step 13 . NO - Go to step 18 .
  11. Turn the ignition switch OFF.
  12. Replace ECT sensor 2 (see «ECT SENSOR 1 REPLACEMENT»(ref-220946-S15107920842006022100000) ).
  13. Reconnect all connectors.
  14. Turn the ignition switch ON (II).
  15. Reset the PCM with the HDS.
  16. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-220951-S17680691112006022100000) ).
  17. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P2184 is indicated, check for poor connections or loose terminals at ECT sensor 2 and the PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting. NO - Troubleshooting is complete.
  18. Update the PCM if it does not have the latest software, or substitute a known-good PCM (see «PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-220945-S16531944742006022100000) ).
  19. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P2184 is indicated, check for poor connections or loose terminals at ECT sensor 2 and the PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting. NO - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(ref-220946-S32339521312006022100000) ).

Scheme 105

Scheme 105: DTC P2185: ECT Sensor 2 Circuit High Voltage
Scheme 105: DTC P2185: ECT Sensor 2 Circuit High Voltage

Scheme 106

Scheme 106
Scheme 106

Scheme 107

Scheme 107
Scheme 107

Scheme 108

Scheme 108
Scheme 108
  1. Turn the ignition switch ON (II).
  2. Check ECT SENSOR 2 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, system is OK at this time. Check for poor connections or loose terminals at ECT sensor 2 and the PCM.
  3. Turn the ignition switch OFF.
  4. Disconnect ECT sensor 2 2P connector.
  5. Connect ECT sensor 2 2P connector terminals No. 1 and No. 2 with a jumper wire.
  6. Turn the ignition switch ON (II).
  7. Check ECT SENSOR 2 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 20 .
  8. Turn the ignition switch OFF.
  9. Remove the jumper wire from the ECT sensor 2 2P connector.
  10. Turn the ignition switch ON (II).
  11. Measure voltage between ECT sensor 2 2P connector terminal No. 1 and body ground. Is there about 5 V? YES - Go to step 12. NO - Go to step 16 .
  12. Turn the ignition switch OFF.
  13. Jump the SCS line with the HDS.
  14. Disconnect PCM connector C (44P).
  15. Check for continuity between PCM connector terminal C14 and ECT sensor 2 2P connector terminal No. 2. Is there continuity? YES - Go to step 27 . NO - Repair open in the wire between the PCM (C14) and ECT sensor 2, then go to step 22 .
  16. Turn the ignition switch OFF.
  17. Jump the SCS line with the HDS.
  18. Disconnect PCM connector C (44P).
  19. Check for continuity between PCM connector terminal C36 and ECT sensor 2 2P connector terminal No. 1. Is there continuity? YES - Go to step 27 . NO - Repair open in the wire between the PCM (C36) and ECT sensor 2, then go to step 22 .
  20. Turn the ignition switch OFF.
  21. Replace ECT sensor 2 (see «ECT SENSOR 1 REPLACEMENT»(ref-220946-S15107920842006022100000) ).
  22. Reconnect all connectors.
  23. Turn the ignition switch ON (II).
  24. Reset the PCM with the HDS.
  25. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-220951-S17680691112006022100000) ).
  26. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P2185 is indicated, check for poor connections or loose terminals at ECT sensor 2 and the PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting. NO - Troubleshooting is complete.
  27. Update the PCM if it does not have the latest software, or substitute a known-good PCM (see «PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-220945-S16531944742006022100000) ).
  28. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P2185 is indicated, check for poor connections or loose terminals at ECT sensor 2 and the PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting. NO - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(ref-220946-S32339521312006022100000) ).

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