Troubleshooting
P0115 - Engine Coolant Temperature Circuit MalfunctionCIRCUIT DESCRIPTION
DTC Detecting Condition:
A thermistor built into the water temperature sensor changes the resistance value according to the water temperature.
The structure of the sensor and connection to the ECM is the same as the ones of the air temperature sensor.
HINT: After confirming DTC P0115, use the OBD II scan tool or hand-held tester to confirm the engine coolant temperature from the CURRENT DATA.
Wiring Diagram:
Step 1 - 3:
Step 3 (Continued) - 5:
INSPECTION PROCEDURE
HINT:
- If DTCs P0100, P0101, P0110, P0115 and P0120 are output simultaneously, E2 (sensor ground) may be open.
- Read freeze frame data using the hand-held tester or OBD II scan tool, as freeze frame data records the engine conditions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was lean or rich, etc. at the time of the malfunction.