Nissan GT-R (R35) · Service Manual ENGINE

P0116 ECT SENSOR

VR38

P0116

Description


The engine coolant temperature sensor is used to detect the engine coolant temperature. The sensor modifies a voltage signal from the ECM. The modified signal returns to the ECM as the engine coolant temperature input. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases.

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<Reference data>

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Engine coolant temperature
[°C (°F)]
Voltage* (V)
Resistance (kΩ)
–10 (14)
4.4
7.0 - 11.4
20 (68)
3.5
2.1 - 2.5
50 (122)
2.3
0.68 - 1.00
90 (194)
0.9
0.236 - 0.260
*: These data are reference values and are measured between ECM terminals 46 (Engine coolant temperature sensor) and 26 (Sensor ground).

DTC Logic

 
 DTC DETECTION LOGIC

NOTE：
 If DTC P0116 is displayed with P0117 or P0118, first perform the trouble diagnosis for DTC P0117, P0118. Refer to DTC Logic (GT-R certified NISSAN dealer).

DTC No.
 		Trouble diagnosis name
 		DTC detecting condition
 		Possible cause
P0116
 		Engine coolant temperature sensor circuit range/performance
 		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.
  • Harness or connectors
    (High or low resistance in the circuit)
  • Engine coolant temperature sensor

 
 DTC CONFIRMATION PROCEDURE

 
 1.PRECONDITIONING
 
 2.PERFORM DTC CONFIRMATION PROCEDURE

Diagnosis Procedure


 
 1.CHECK GROUND CONNECTION
 
 2.CHECK ENGINE COOLANT TEMPERATURE SENSOR
 
 3.CHECK INTERMITTENT INCIDENT

Component Inspection


 
 1.CHECK ENGINE COOLANT TEMPERATURE SENSOR