DTC P1116: ECT Sensor 1 Circuit Range/Performance Problem
- Before you troubleshoot, record all freeze data and any on-board snapshot, and review GENERAL TROUBLESHOOTING INFORMATION .
- If DTC P0111 is stored at the same time as DTC P1116, troubleshoot DTC P0111 first, then recheck for DTC P1116.
- 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 connections or terminals, then go to step 28.
- Turn the ignition switch to ON (II).
- Check for Pending or Confirmed DTCs with the HDS.
Are DTC P1116 and P2183 indicated at the same time?
YES: Go to step 15.
NO: Go to step 4.
- Start the engine, and let it idle for 10 minutes.
- Check ECT SENSOR 1 in the DATA LIST with the HDS.
Is about 97°F (36°C) or less indicated?
YES: Replace ECT sensor 1 (see ECT SENSOR 1 REPLACEMENT ), then go to step 27.
NO: Go to step 6.
- Turn the ignition switch to LOCK (0).
- Drain the coolant (see COOLANT CHECK ).
- Remove ECT sensor 1 (see ECT SENSOR 1 REPLACEMENT ).
- Allow ECT sensor 1 to cool to the ambient temperature.
- Note the ambient temperature.
- Connect ECT sensor 1 to its 2P connector, but do not install it.
- Turn the ignition switch to ON (II).
- Note the value of ECT SENSOR 1 quickly in the DATA LIST with the HDS.
- Compare the value of ECT SENSOR 1 and the ambient temperature.
Does the value of ECT SENSOR 1 differ 5.4°F (3°C) or more from the ambient temperature?
YES: Replace ECT sensor 1 (see ECT SENSOR 1 REPLACEMENT ), then go to step 27.
NO: Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the ECM/PCM.
- Start the engine, and let it idle for 10 minutes.
- Check ECT SENSOR 1 in the DATA LIST with the HDS.
Is about 97°F (36°C) or less indicated?
YES: Replace ECT sensor 1 (see ECT SENSOR 1 REPLACEMENT ), then go to step 27.
NO: Go to step 17.
- Let the engine idle 10 minutes.
- Check ECT SENSOR 2 in the DATA LIST with the HDS.
Is about 97°F (36°C) or less indicated?
YES: Replace ECT sensor 2 (see ECT SENSOR 1 REPLACEMENT ), then go to step 27.
NO: Go to step 19.
- Turn the ignition switch to LOCK (0).
- Drain the coolant (see COOLANT CHECK ).
- Remove ECT sensor 1 (see ECT SENSOR 1 REPLACEMENT ) and ECT sensor 2 (see ECT SENSOR 1 REPLACEMENT ).
- Allow the sensors to the cool to ambient temperature.
- Note the ambient temperature.
- Connect ECT sensor 1 and ECT sensor 2 to their 2P connectors, but do not install them.
- Note the value of ECT SENSOR 1 and ECT SENSOR 2 quickly in the DATA LIST with the HDS.
- Compare the value of ECT SENSOR 1 and the ambient temperature, and the value of ECT SENSOR 2 and the ambient temperature individually.
Does one of the sensors 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, the system is OK at this time. Check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the ECM/PCM.
- Refill the engine coolant (see COOLANT CHECK ).
- Turn the ignition switch to ON (II).
- Reset the ECM/PCM with the HDS.
- Do ECM/PCM IDLE LEARN PROCEDURE .
- Check for Pending or Confirmed DTCs with the HDS.
Is DTC P1116 indicated?
YES: Check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the ECM/PCM, then go to step 1.
NO: Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.