P0125

Reference Data:

Component Description

NOTE: If DTC P0125 (0908) is displayed with P0115 (0103), first perform trouble diagnosis for DTC P0115.

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.

On Board Diagnosis Logic:

DTC Confirmation Procedure

CAUTION: Be careful not to overheat engine.

NOTE: If "DTC Confirmation Procedure" has been previously conducted, always turn ignition switch OFF and wait at least 5 seconds before conducting the next test.

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




3. Start engine and run it for 65 minutes at idle speed.
If "COOLAN TEMP/S" increases to more than 10 °C (50 °F) within 65 minutes, stop engine because the test result will be OK.
4. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.

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

EC-ECTS-01:

Wiring Diagram

Diagnostic Procedure

Step 1 - 4:

Step 5 - 7: