Code 14 - Coolant Sensor Shorted
Code 14 indicates the ECM has seen low resistance of the coolant sensor circuit as high engine temperature, or low voltage at ECM terminal "3", for a time longer than specified.
NOTE:
The following step numbers refer to the numbers in the accompanying flow chart(s).
- This test determines whether fault is in sensor or circuit. Normal circuit voltage is about 5 volts or Scanner should read very low (-10°C). A low voltage or high coolant temperature would indicate a faulty circuit or ECM.
- This test checks for grounded circuit between ECM and coolant sensor. Test light to battery positive will be off in an ungrounded circuit. Coolant sensor is not connected during the test.