Code 14: Coolant Sensor Shorted

Code 14 means 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.

1. This test determines whether fault is in sensor or circuit. Normal circuit voltage is about 5 volts.
   NOTE: Coolant sensor IS NOT connected during this test.
2. This step checks for a grounded circuit between ECM and coolant sensor. Test light to B+ should be off in an ungrounded circuit. The coolant sensor is not connected during test.

Fig 1: Code 14: Coolant Sensor Shorted