Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Operate the engine and compare the actual engine coolant temperature with the temperature indicated by the instrument cluster temperature gauge. Is the engine coolant temperature and the indicated coolant temperature within the specified value of each other? | -1°C (30°F) | Go to Step 2 | Go to Step 3 |
2 | This indicates that the temperature gauge is functioning properly. Check the operation of the cooling system if applicable. Is the cooling system operating properly? | -- | System OK | -- |
3 |
Does the temperature gauge indicate cold, then hot? | -- | Go to Step 7 | Go to Step 4 |
4 | Check the temperature gauge. Did the temperature gauge indicate significantly below hot at the specified value? | 49.5 ohms | Go to Step 5 | Go to Step 10 |
5 |
Does the DMM indicate continuity? | 20 ohms | Go to Step 6 | Go to Step 10 |
6 | Locate and repair the high resistance in CKT 135 (DK GRN) between the instrument cluster and the engine coolant temperature sensor. Is the repair complete? | -- | System OK | -- |
7 | Is the engine a gasoline engine? | -- | Go to Step 8 | Go to Step 9 |
8 | Replace the engine coolant temperature sensor. Refer to Engine Coolant Temperature Sensor Replacement . Is the repair complete? | -- | System OK | -- |
9 | Replace the engine coolant temperature sensor on the 7.2L diesel. Refer to Engine Coolant Temperature Sensor Replacement . Is the repair complete? | -- | System OK | -- |
10 | Replace the IP cluster. Refer to Instrument Cluster Replacement . Is the repair complete? | -- | System OK | -- |
