DTC P0115 ENGINE COOLANT TEMPERATURE SENSOR (ECTS) (CIRCUIT); Component Description; CONSULT-II Reference Value; On Board Diagnosis Logic
EF & EC-7086spec tableCAUTION typos 'grond' and 'transistor' singular preserved verbatim. Monitor item label 'COOLAN TEMP/S' verbatim (source spelling — should likely be 'COOLAN TEMP/S' as displayed by CONSULT-II).
CG10, CGA3
Component 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.
Reference data
ECTS Reference Data
-10 (14)
Voltage* V4.4
Resistance kΩ7.0 - 11.4
20 (68)
Voltage* V3.5
Resistance kΩ2.1 - 2.9
50 (122)
Voltage* V2.2
Resistance kΩ0.68 - 1.00
90 (194)
Voltage* V0.9
Resistance kΩ0.236 - 0.260
NOTE
*: These data are reference values and are measured between ECM terminal 70 (Engine coolant temperature sensor) and ground.
CAUTION
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in damage to the ECM's transistor. Use a grond other than ECM terminals, such as the ground.
CONSULT-II Reference Value in Data Monitor Mode
CONSULT-II Reference Values — ECTS Data Monitor
COOLAN TEMP/S
ConditionEngine: After warming up
SpecificationMore than 70 °C (158 °F)