Step | Action | Value(s) | 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 the 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 |
Does the voltage measure within the specified range? | 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 |
Does the temperature gage move to the high end of the scale? | -- | Go to Step 5 |
