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.
On Board Diagnosis Logic
Malfunction is detected when an excessively high or low voltage from the sensor is sent to ECM.
FAIL-SAFE MODE
When this malfunction is detected, the ECM enters fail-safe mode and the MIL lights up.
Possible Cause
- Harness or connectors
(The sensor circuit is open or shorted. )
- Engine coolant temperature sensor
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" below.
WITH GST
Follow the procedure "WITH CONSULT-II" above.
EC-ECTS-01:
EC-ECTS-01 - Connector View:
Wiring Diagram
Diagnostic Procedure
Diagnostic Procedure Step 1:
Diagnostic Procedure Step 2:
Diagnostic Procedure Step 3:
Diagnostic Procedure Step 4:
