Test Description
The number below refers to the step number on the diagnostic table.
- 1: Begin the diagnostic table at Step 1 if the problem is that the temperature gage always indicates HOT. Begin the diagnostic table at Step 7 if the problem is that the temperature gage always indicates COOL.
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| 1 | Allow the engine to cool to room temperature. With the ignition ON, does the temperature gage always read at the high end of the scale? |
- | Go to Step 2 | Go to Step 7 |
| 2 | Disconnect the coolant temperature sensor electrical connector. Does the temperature gage indicator drop to the low end of the scale? |
- | Go to Step 3 | Go to Step 4 |
| 3 | Replace the coolant temperature gage sensor. Refer to Engine Coolant Temperature Sensor Replacement
in Engine Cooling. Is the repair complete? |
- | System OK | - |
| 4 | Inspect for a short to ground between the coolant temperature sensor and the temperature gage. | - | Go to Step 5 | Go to Step 6 |
| 5 | Repair the short to ground. Is the repair complete? |
- | System OK | - |
| 6 | Replace the instrument cluster. Refer to Instrument Panel Cluster (IPC) Replacement . Is the repair complete? |
- | System OK | - |
| 7 |
|
11-14 V | Go to Step 10 | Go to Step 8 |
| 8 | Inspect for an open circuit between the coolant temperature sensor and the temperature gage. 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 gage. Is the repair complete? |
- | System OK | - |
| 10 |
|
- | Go to Step 3 | Go to Step 6 |