DTC 14

Fig. 66 - Chart #14 Diagnosis:

Code 14 means the ECM has seen low resistance of the coolant sensor circuit as follows:
- Low resistance (high engine temperature)
- Or low voltage (at ECM Terminal "3")
- For a time longer than specified

1. This step determines whether the fault is at the coolant sensor or elsewhere in the circuit. Normal voltage should be about 5 volts in the circuit.
2. This step checks for a grounded circuit between the ECM and the coolant sensor. Test light to B+ should be "OFF" in an ungrounded circuit. The coolant sensor is not connected during the test.