DTC P0116: ECT Sensor 1 Circuit Range/Performance Problem Acura RDX I facelift

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

1. Turn the ignition switch to ON (II).
2. Check ECT SENSOR 1 in the DATA LIST with the HDS. Is about 176°F (80°C) or more, or 0.78 V or less indicated? YES -Go to step 6 . NO -Go to step 3.
3. Note the value of ECT SENSOR 1 in the DATA LIST with the HDS.
4. Start the engine. Hold the engine speed at 3, 000 RPM without load (in P or N) until the radiator fan comes on, then let it idle.
5. Check ECT SENSOR 1 in the DATA LIST with the HDS. Does ECT SENSOR 1 change 18°F(10°C) or more? YES -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at ECT sensor 1 and the PCM. NO -Go to step 11 .
6. Note the value of ECT SENSOR 1 in the DATA LIST with the HDS.
7. Turn the ignition switch to LOCK (0).
8. Open the hood, and let the engine cool for 3 hours.
9. Turn the ignition switch to ON (II).
10. Check ECT SENSOR 1 in the DATA LIST with the HDS. Does ECT SENSOR 1 change 18°F (10°C) or more? YES -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at ECT sensor 1 and the PCM. NO -Go to step 11.
11. Turn the ignition switch to LOCK (0).
12. Replace ECT sensor 1 (see «ECT SENSOR 1 REPLACEMENT»(ref-513833-S15821966552012111600000) ).
13. Turn the ignition switch to ON (II).
14. Reset the PCM with the HDS.
15. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-513856-S30291526352012111600000) ).
16. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0116 indicated? YES -Check for poor connections or loose terminals at ECT sensor 1 and the PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated «DTCS TROUBLESHOOTING»(ref-513833-S32692288912012111600000) .