Cooling Fan Inoperative (Inoperative in High 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 Speed)
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Engine Cooling Schematics Connector End View Reference: Cooling System Connector End Views DEFINITION: The engine cooling fan motor is inoperative in high speed. |
|||
| 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 at high speed? |
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Test the fan 2 relay coil supply voltage circuit for an open. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 11 | Go to Step 4 |
| 4 | Test the fan 2 relay coil control circuits for an open or 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 11 | Go to Step 5 |
| 5 |
|
Go to Step 7 | Go to Step 6 |
| 6 | Test for an open in the fan 2 relay high speed ground circuit. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 11 | Go to Step 8 |
| 7 | Inspect for a poor connection at the harness connector of the fan 2 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 11 | Go to Step 9 |
| 8 | 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 11 | Go to Step 10 |
| 9 | Replace the fan 2 relay. Refer to Cooling Fan Relay Replacement . Did you complete the replacement? |
Go to Step 11 | - |
| 10 | 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 11 | - |
| 11 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |