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.

On Board Diagnosis Logic:

DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE

NOTE: If "DIAGNOSTIC TROUBLE CODE 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-II.
3. Wait at least 5 seconds.
4. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.

OR

With Generic Scan Tool
1. Turn ignition switch "ON" and wait at least 5 seconds.
2. Select "MODE 7", with GST.
3. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.

EC-ECTS-01:

EC-ECTS-01 Connector View:

WIRING DIAGRAM




DIAGNOSTIC PROCEDURE

COMPONENT INSPECTION







Engine coolant temperature sensor
Check resistance as shown in the figure.

Reference Data:

If NG, replace engine coolant temperature sensor.