Temperature Gauge Inoperative, Other Gauges and Warning Lamps Are OK
TEMPERATURE GAUGE DIAGNOSIS CHART
| 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 7 | Go to Step 2 |
| 2 | Disconnect ECM electrical connector. Does the temperature gauge indicator drop to the low end of the scale? |
- | Go to DIAGNOSTIC AIDS | Go to Step 3 |
| 3 | Check for a short to ground between the ECM and the temperature gauge. 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 gauge. Is the repair complete? |
- | System OK | - |
| 6 |
Does the voltage equal the value specified? |
11 - 14V | Go to Step 9 | Go to Step 7 |
| 7 | Check for an open circuit between the ECM and the temperature gauge. Is there an open circuit? |
- | Go to Step 8 | Go to Step 5 |
| 8 | Repair the open circuit between the ECM and the temperature gauge. Is the repair complete? |
- | System OK | - |
| 9 |
Does the temperature gauge move to the high end of the scale? |
- | Go to DIAGNOSTIC AIDS | Go to Step 5 |