Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Engine Cooling Schematics Connector End View Reference: Cooling System Connector End Views DEFINITION: One or both engine cooling fan motors run continuously in high or low speed. | |||
1 | Did you perform the Engine Cooling Diagnostic System Check? | Go to Step 2 | |
2 | Turn ON the ignition, with the engine OFF. Are one or both cooling fans ON? | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems |
3 | Are both cooling fans running continuously? | Go to Step 5 | Go to Step 4 |
4 | Remove the cooling fan mode relay. Did the right cooling fan turn OFF? | Go to Step 8 | Go to Step 9 |
5 | Inspect for a short to voltage in the left cooling fan supply voltage circuit. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 6 |
6 | Inspect for a short to ground in the low speed cooling fan relay control circuit. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 7 |
7 | Replace the cooling fan 1 relay. Did you complete the replacement? | Go to Step 10 | -- |
8 | Repair the short to voltage in the left cooling fan low reference circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 10 | -- |
9 | Remove the cooling fan 2 relay. Did the cooling fan turn OFF? | Go to Step 10 | Go to Step 11 |
10 | Replace the cooling fan 2 relay. Did you complete the replacement? | Go to Step 12 | -- |
11 | Repair the short to voltage in the right cooling fan supply voltage circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 12 | -- |
12 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
