P0115
DTC P0115 - Engine Coolant Temp. SensorComponent 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
On Board Diagnosis Logic
DTC Confirmation Procedure
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
1. Turn ignition switch "ON".
2. Select "DATA MONITOR" mode with CONSULT.
3. Wait at least 5 seconds.
With GST
1. Turn ignition switch "ON" and wait at least 5 seconds.
2. Select "MODE 7" with GST.
No Tools
1. Turn ignition switch "ON" and wait at least 5 seconds.
2. Turn ignition switch "OFF", wait at least 5 seconds and then turn "ON".
3. Perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM.
Wiring Diagram
Connectors
Diagnostic Procedure
Steps 1 - 6:
Component Inspection
Check resistance as shown in the figure.
Reference data
If NG, replace engine coolant temperature sensor.