Cooling Fan Inoperative (Inoperative in High and Low Speed)
WARNING: This page is about a different car, the 2004 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
Reference Table
| Symptom | Causes |
|---|---|
| Fan motor inoperative in both speeds |
|
| Fan motor inoperative in high speed only |
|
| Fan motor low speed operates at high speed |
|
| Fan motor inoperative in low speed only | Open or short to B+ in the fan resistor circuit. |
Cooling Fan Inoperative (Inoperative in High and Low Speed)
| 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 both fan speeds. |
|||
| 1 | Did you review the Cooling System Description and Operation and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Engine Cooling |
| 2 | Run the engine until operating temperature is reached and the thermostat opens. Does the cooling fan operate? |
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 |
|
Go to Step 11 | Go to Step 4 |
| 4 |
|
Go to Step 10 | Go to Step 5 |
| 5 | Test the fan 1 relay and the fan 2 relay supply voltage circuits for an open or a short to ground. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 16 | Go to Step 6 |
| 6 | Test the fan 1 relay coil control circuit for an open or a short to B+. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 16 | Go to Step 7 |
| 7 | Test the fan 2 relay coil control circuit for a short to B+. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 16 | Go to Step 8 |
| 8 | Test the fan motor supply voltage circuit for an open or a short to ground. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 16 | Go to Step 9 |
| 9 | Test the fan motor ground circuit for an open or a short to B+. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 16 | Go to Step 12 |
| 10 | Inspect for a poor connection at the harness connector of the fan 1 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 16 | Go to Step 13 |
| 11 | Inspect for a poor connection at the harness connector of the fan motor. 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 16 | Go to Step 14 |
| 12 | Inspect for a poor connection at the harness connector of the powertrain control module (PCM). 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 16 | Go to Step 15 |
| 13 | Replace the fan 1 relay. Refer to Cooling Fan Relay Replacement . Did you complete the replacement? |
Go to Step 16 | - |
| 14 | Replace the fan motor. Refer to Cooling Fan Replacement - Electric . Did you complete the replacement? |
Go to Step 16 | - |
| 15 | Replace the PCM. Refer to Powertrain Control Module (PCM) Replacement
in Engine Controls LNK or Powertrain Control Module (PCM) Replacement
in Engine Controls LV6. Did you complete the replacement? |
Go to Step 16 | - |
| 16 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |