Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference : Engine Cooling Schematics , HVAC Schematics 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 cool fan relay. Did the right cooling fan turn OFF? | Go to Step 8 | Go to Step 6 |
5 | Remove the cool fan 1 relay. Did the cooling fans turn OFF? | Go to Step 10 | Go to Step 7 |
6 | Remove the cool fan 2 relay. Did the right cooling fan turn OFF? | Go to Step 11 | Go to Step 9 |
7 | Repair the short to voltage in the left cooling fan motor supply voltage circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 14 | -- |
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 14 | -- |
9 | Repair the short to voltage in the right cooling fan motor supply voltage circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 14 | -- |
10 | Inspect for poor connections at the cool fan 1 relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Repairs. Did you find and correct the condition? | Go to Step 14 | Go to Step 12 |
11 | Inspect for poor connections at the cool fan 2 relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Repairs. Did you find and correct the condition? | Go to Step 14 | Go to Step 13 |
12 | Replace the cool fan 1 relay. Did you complete the replacement? | Go to Step 14 | -- |
13 | Replace the cool fan 2 relay. Did you complete the replacement? | Go to Step 14 | -- |
14 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
