P0115

Reference Data:

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.

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 ground other than ECM terminals, such as the ground.

Consult-II Reference Value In Data Monitor Mode:

On Board Diagnosis Logic Part 1:

On Board Diagnosis Logic Part 2:

DTC Confirmation Procedure

NOTE: If "DTC Confirmation Procedure" has been previously conducted, always turn ignition switch "OFF" and wait at least 10 seconds before conducting the next test.

With CONSULT-II
1. Turn ignition switch "ON".
2. Select "DATA MONITOR" mode with CONSULT-II.




3. Wait at least 5 seconds.
4. If 1st trip DTC is detected, go to "Diagnostic Procedure".

With GST
Follow the procedure "With CONSULT-II" above.

EC-ECTS-01:

EC-ECTS-01 Connector View:

Wiring Diagram

Steps 1 - 2:

Steps 3 - 6:

Diagnostic Procedure

Component Inspection

Reference Data:

ENGINE COOLANT TEMPERATURE SENSOR
Check resistance as shown in the figure.
If NG, replace engine coolant temperature sensor.