Temperature Gauge Diagnosis

Test Description 

The number(s) below refer to step(s) on the diagnostic table.

1. Begin the diagnostic table at Step 1 if the problem is that the temperature gauge always indicates full. Begin the diagnostic table at Step 7 if the problem is that the temperature gauge always indicates empty.
   TEMPERATURE GAUGE INOPERATIVE, OTHER GAUGES OK
   
   

   Step	Action	Value(s)	Yes	No
   1	Allow the engine to cool to room temperature. With the ignition ON, does the temperature gauge always read at the high end of the scale?	-	Go to Step 3.	Go to Step 2.
   2	Disconnect the coolant temperature sensor electrical connector. Does the temperature gauge indicator drop to the low end of the scale?	-	Go to Step 3.	Go to Step 4.
   3	Replace the coolant temperature sensor. Is the repair complete?	-	System OK	-
   4	Check for a short to ground between the coolant temperature sensor and the temperature gauge. Is there a short to ground?	-	Go to Step 5.	Go to Step 6.
   5	Repair the short to ground. Is the repair complete?	-	System OK	-
   6	Replace instrument cluster. Is the repair complete?	-	System OK	-
   7	Disconnect the coolant temperature sensor. Turn the ignition ON. Check the voltage at the coolant temperature sensor connector. Is the voltage equal to the specified value?	11-14V	Go to Step 10.	Go to Step 8.
   8	Check for an open circuit between the coolant temperature sensor and the temperature gauge. Is there an open circuit?	-	Go to Step 9.	Go to Step 6.
   9	Repair the open circuit between the coolant temperature sensor and the temperature gauge. Is the repair complete?	-	System OK	-
   10	Disconnect the coolant temperature sensor. Connect a jumper wire between the coolant temperature sensor connector and ground. Turn the ignition ON. Does the temperature gauge move to the high end of the scale?	-	Go to Step 3.	Go to Step 6.