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Home >> Nissan-Datsun >> 2017 >> Maxima SL >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (2 Of 4) >> DTC/Circuit Diagnosis >> DTC P0116: ECT Sensor >> DTC Description >> DTC Detection Logic

DTC Detection Logic

The comparison result of signals transmitted to ECM from each temperature sensor (IAT sensor, ECT sensor, FTT sensor, and EOT sensor) shows that the voltage signal of the ECT sensor is higher/lower than that of other temperature sensors when the engine is started with its cold state.

DTC CONSULT screen terms
(Trouble diagnosis content)		 DTC detection condition
P0116 ECT SEN/CIRC
(Engine coolant temperature sensor 1 circuit range/performance)		 Diagnosis condition -
Signal (terminal) Voltage signal transmitted from ECT sensor to ECM
Threshold
  • The comparison result of signals transmitted to ECM from each temperature sensor (IAT sensor, ECT sensor, FTT sensor, and EOT sensor) shows that the voltage signal of the ECT sensor is higher/lower than that of other temperature sensors when the engine is started with its cold state
  • Engine coolant temperature signal from engine coolant temperature sensor does not fluctuate, even when some time has passed after starting the engine with pre-warming up condition
Diagnosis delay time -
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