Engine Coolant Temperature Gage Inaccurate or Inoperative
Engine Coolant Temperature Gage Inaccurate or Inoperative
| 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 7 | Go to Step 2 |
| 2 | Disconnect engine control module (ECM) electrical connector. Does the temperature gage indicator drop to the low end of the scale? |
- | - | Go to Step 3 |
| 3 | Inspect for a short to ground between the ECM and the temperature gage. Is there a short to ground? |
- | Go to Step 4 | Go to Step 5 |
| 4 | Repair the short to ground. Is the repair complete? |
- | System OK | - |
| 5 | Replace the temperature gage. Is the repair complete? |
- | System OK | - |
| 6 |
|
11-14 V | Go to Step 9 | Go to Step 7 |
| 7 | Inspect for an open circuit between the ECM and the temperature gage. Is there an open circuit? |
- | Go to Step 8 | Go to Step 5 |
| 8 | Repair the open circuit between the ECM and the temperature gage. Is the repair complete? |
- | System OK | - |
| 9 |
|
- | - | Go to Step 5 |