Code 0908
COMPONENT DESCRIPTION
The engine coolant temperature sensor is located near the No.2 injector. The 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
DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE
CAUTION: Do not overheat engine.
NOTE:
- If DTC P0115 (0103) is displayed with P0125 (0908), first perform TROUBLE DIAGNOSIS FOR DTC P0115.
- 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 "COOLAN TEMP/S" in "DATA MONITOR" mode with CONSULT.
3. Start engine and run it for 20 minutes at idle speed.
If "COOLAN TEMP/S" increases to more than 10 °C (50 °F) within 20 minutes, stop engine because the test result will be OK.
4. If 1st DTC is detected, go to "DIAGNOSTIC PROCEDURE".
OR
With Generic Scan Tool
1. Start engine and run it for 20 minutes at idle speed.
2. Select "MODE 7" with GST.
If "COOLAN TEMP/S" increases to more than 10 °C (50 °F) within 20 minutes, stop engine because the test result will be OK.
3. If 1st DTC is detected, go to "DIAGNOSTIC PROCEDURE".
OR
Without Scan Tools
1. Start engine and run it for 20 minutes at idle speed.
2. Turn ignition switch "OFF", wait at least 5 seconds and then turn "ON".
3. Perform "Diagnostic Test Mode II (Self-diagnostic result)" with ECM.
4. If 1st DTC is detected, go to "DIAGNOSTIC PROCEDURE".
If voltage between ECM terminals 06 and ground decreases to less than 3.8V within 20 minutes, stop engine because the test result will be OK.
WIRING DIAGRAM
DIAGNOSTIC PROCEDURE
COMPONENT INSPECTION
Check resistance.
If NG, replace engine coolant temperature sensor.