For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
1 | Did you review the Instrument Cluster Circuit Description and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Instrument Panel, Gages and Console
2 | Verify that the engine coolant temperature (ECT) gauge is inoperative. Does the ECT gauge operate normally? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3
3 |

1. Turn the ignition switch to LOCK.
2. Disconnect the ECT sending unit connector.
3. Connect the red lead from the J 33431-C

Does the ECT gauge indicate the appropriate readings within the specified values?

Go to Step 4

Go to Step 5

4 | Replace the ECT sending unit. Did you complete the repair? | Go to Step 10 | --
5 | Test for a short to ground condition from the instrument cluster connector C3, cavity 4 and the ECT sending unit cavity 2. Does a short to ground condition exist? | Go to Step 6 | Go to Step 7
6 | Repair the open in the YEL/WHT wire between the instrument panel cluster assembly and the ECT sending unit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 10 | --
7 | Inspect for damage or loose connections in the instrument panel cluster printed circuit. Does damage or loose connections exist? | Go to Step 8 | Go to Step 9
8 | Replace the instrument panel cluster printed circuit. Refer to Printed Instrument Cluster Circuit Replacement . Did you complete the repair? | Go to Step 10 | --
9 | Replace the ECT gauge. Refer to Fuel/Temperature Gage Replacement . Did you complete the repair? | Go to Step 10 | --
10 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3