Code 0103

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.




DIAGNOSTIC CHART




DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE
CONSULT
1) Turn ignition switch "ON".
2) Select "DATA MONITOR" mode with CONSULT.
3) Wait for at east 5 seconds.

OR

GST
1) Turn ignition switch "ON" and wait for at least 5 seconds.
2) Select "MODE 3" with GST.

OR

NO TOOLS
1) Turn switch "ON" and wait for at least 5 TOOLS ignition seconds.
2) Turn ignition switch "OFF", wait for at least 5 seconds and then turn "ON".
3) Perform diagnostic test mode II (Self-diagnostic results) with ECM.










COMPONENT INSPECTION
Engine coolant temperature sensor Check resistance as shown in the figure.
If NG, replace engine coolant temperature sensor.




WIRING DIAGRAM