Engine Coolant Temperature Sensor signal stuck high, stuck low or abnormal performance is detected, PCM sets DTC P0116.
Item | Detecting Condition | Possible Cause | |
DTC Strategy | Case 1 |
•
Signal Stuck Low | 1. Poor Connector Connection 2. Open or Short in ECT Sensor Signal Circuit 3. Open or Short in IAT Sensor Signal Circuit 4. Defected ECT Sensor 5. Defected IAT Sensor |
Case 2 |
•
Signal Stuck High | ||
Case 3 |
•
Plausibility Monitoring | ||
Enable Condition | Case 1 |
•
ECT at engine start lower than 169℉(76℃)
•
Battery voltage higher than 6V and lower than 16V
•
No relevant DTC present | |
Case 2 |
•
ECT at engine start higher than or equal to 169℉(76℃)
•
ECT at engine start higher than or equal to 169℉(76℃)
•
IAT at engine start higher than 14℉(-10℃) and lower than 158℉(70℃)
•
Ambient air temperature model higher than 14℉(-10℃)
•
Part load driving condition(Engine speed higher than 1400 RPM & Vehicle Speed higher than 22 mph(35 km/h) & Mass air flow > 5.5g/sec) for more than 250 to 500 sec. depending on IAT
•
Low load driving condition(Fuel cut off or idle with vehicle speed lower than 12 mph(19 km/h) for more than 200 to 400 sec. depending on IAT
•
No relevant DTC present | ||
Case 3 |
•
480 Min. after engine stop time
•
IAT at engine start higher than -22℉(-30℃) and lower than 122℉(50℃)
•
Engine operating state out of start or number of revolutions in start phase more than 2 Rev.
•
No relevant DTC present | ||
Threshold Value | Case 1 |
•
Measured ECT increase less than 0.6℉(0.75℃) to 63℉(35℃) versus ECT at start | |
Case 2 |
•
ECT variation since engine start less than 4.05℉(2.25℃) | ||
Case 3 |
•
Deviation of ECT at start and IAT at start higher than 68℉(20℃) in case of IAT at start is 68℉(20℃) higher than ECT at start
•
Deviation of ECT at start and IAT at start higher than 104℉(40℃) in case of IAT at start is 68℉(20℃) less than ECT at start
•
Deviation of ECT at start and IAT at start higher than -4℉(-20℃) | ||
Diagnostic Time |
•
Immediately | ||
MIL ON Condition |
•
2 Driving Cycle | ||
