DTC P0116: ECT Sensor Circuit Range/Performance Problem

Turn the ignition switch ON (II).
Check the ECT SENSOR in the DATA LIST with the HDS.
Is about 176 °F (80 °C) or higher, or 0.78 V or less indicated?
1. YES - Go to step 6.
2. NO - Go to step 3.
Note the value of the ECT SENSOR in the DATA LIST with the HDS.
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Check the ECT SENSOR in the DATA LIST with the HDS.
Does the ECT SENSOR change 18 °F (10 °C) or higher?
1. YES - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the ECT sensor and the ECM/PCM.
2. NO - Go to step 11.
Note the value of the ECT SENSOR in the DATA LIST with the HDS.
Turn the ignition switch OFF.
Open the hood, and let the engine cool for 3 hours.
Turn the ignition switch ON (II).
Check the ECT SENSOR in the DATA LIST with the HDS.
Does the ECT SENSOR change 18 °F (10 °C) or more?
1. YES - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the ECT sensor and the ECM/PCM.
2. NO - Go to step 11.
Turn the ignition switch OFF.
Replace the ECT sensor (see ECT SENSOR REPLACEMENT ).
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see ECM/PCM IDLE LEARN PROCEDURE ).
Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
1. YES - If DTC P0116 is indicated, check for poor connections or loose terminals at the ECT 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.
2. NO - Troubleshooting is complete.