Cooling Fan Inoperative
WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
Cooling Fan Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Engine Cooling Schematics Connector End View Reference: Cooling System Connector End Views DEFINITION: The cooling fan motor is inoperative in either high or low speeds. |
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| 1 | Did you perform the Diagnostic System Check - Engine Cooling? | Go to Step 2 | Go to Diagnostic System Check - Engine Cooling |
| 2 |
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Go to Step 3 | Go to Step 4 |
| 3 |
IMPORTANT:
A 3 second delay occurs before the engine control module (ECM) changes the cooling fan speed. With a scan tool, command the Fan Control 2 Speed ON and OFF.Does the cooling fan turn ON and OFF in high speed with each command? |
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 6 |
| 4 |
IMPORTANT:
Do NOT remove the jumper wire that you will be connecting until your testing is completed. If the low speed fan fuse opens when you connect the jumper wire, repair the cooling fan motor supply voltage circuit of the cooling fan motor for a short to ground.
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Go to Step 11 | Go to Step 5 |
| 5 |
|
Go to Step 9 | Go to Step 8 |
| 6 | Does the cooling fan operate at high speed? | Go to Step 12 | Go to Step 7 |
| 7 | Inspect the ground circuit of the cool fan high relay for an open or high resistance. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 18 | Go to Step 12 |
| 8 |
|
Go to Step 10 | Go to Step 9 |
| 9 | Inspect the cooling fan motor supply voltage circuit for an open or high resistance. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 18 | Go to Step 14 |
| 10 | Inspect the ground circuit of the cooling fan for an open or high resistance. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 18 | Go to Step 13 |
| 11 | Inspect for poor connections at the cool fan low relay. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 18 | Go to Step 15 |
| 12 | Inspect for poor connections at the cool fan high relay. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 18 | Go to Step 13 |
| 13 | Inspect for poor connections at the harness connector of the cooling fan. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 18 | Go to Step 17 |
| 14 | Inspect the battery positive voltage circuit for an open or high resistance. Refer to Wiring Repairs
and Circuit Testing
in Wiring Systems. Did you find and correct the condition? |
Go to Step 18 | Go to Step 16 |
| 15 | Replace the cool fan low relay. Did you complete the replacement? |
Go to Step 18 | - |
| 16 | Replace the cool fan high relay. Did you complete the replacement? |
Go to Step 18 | - |
| 17 | Replace the cooling fan. Refer to Cooling Fan Replacement - Electric . Did you complete the replacement? |
Go to Step 18 | - |
| 18 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |