For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Instrument Cluster System Check? | -- | Go to Step 2 | Go to Instrument Cluster System Check
2 |

1. Disconnect the engine coolant temperature (ECT) sending unit connector.
2. Connect a fused jumper wire from the ECT connector cavity 3 to ground.
3. Turn the ignition to the ON position.

Does the ETC gauge show the Engine to be hot?

--

Go to Step 3

Go to Step 4

3 | Replace the ECT coolant temperature sensor. Refer to Engine Coolant Temperature Sensor Replacement in Engine Controls. Is the repair complete? | -- | Go to Instrument Cluster System Check | --
4 | Test the YEL/GRN wire using a J 39200 between the instrument cluster C4 cavity 1 and the ECT sending unit for an open. Does the wire have an open? | -- | Go to Step 5 | Go to Step 6
5 | Repair the open in the YEL/GRN wire between the instrument cluster C4 cavity 1 and the ECT sending unit. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Instrument Cluster System Check | --
6 | Test the BRN wire using a J 39200 between the instrument cluster C4 cavity 2 and ground for a short. Does the wire have a short? | -- | Go to Step 7 | Go to Step 8
7 | Repair the short in the BRN wire between the Instrument cluster assembly C4 cavity 2 and ground. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Instrument Cluster System Check | --
8 | Test the instrument cluster assembly printed circuit for any damage. Does the printed circuit have any damage? | -- | Go to Step 9 | Go to Step 10
9 | Replace the instrument cluster assembly printed circuit. Refer to Printed Instrument Cluster Circuit Replacement . Is the repair complete? | -- | Go to Instrument Cluster System Check | --
10 | Replace the ECT gauge, located on the instrument cluster assembly. Refer to Engine Coolant Temperature Gage Replacement in Engine Controls. Is the repair complete? | -- | Go to Instrument Cluster System Check | --