Code P0480, the fan will not turn on?

Hi,

The code you have is specific to an open circuit in the fan 1 wiring. What that means is something is no longer connected, there is a broken wire, or there could be an issue with the powertrain control module (PCM).

Do me a favor. Take a look through the pics below. They provide the diagnostics related specifically to the PO480 code you have. Let me know if you feel comfortable performing them.

Let me know.

Joe

See pics below.

Hi,

If the new fan is doing the same thing, there is a chance it is faulty, but chances are, that isn't the issue.

We need to find out if power is present at the fan motor when the circuit is under a load. What may happen is this. These vehicles use what is called a totally integrated power control module. In my mind, there are too many connector pins in each connector making them smaller.

I've had issues where I would disconnect a component and check for power, and it was present. However, once a load was placed on the circuit, it would fail due to a weak connector at the IPM. The test light or voltmeter really places little to no power load on the circuit, so the weak connection works, but it can't handle the heavy load from the blower motor itself.

Let me know if you can check if that is how he determined power is present. In other words, ask if power was checked when the circuit was under a load.

Let me know.

Joe

Hi,

If there was power and ground, the motor is bad. On the other hand, if there is power and no ground, the circuit isn't complete, and the fan can't run.

I would suspect a ground path was checked as well as the power supply, but I can't be certain. If both are present (power and ground), the fan motor is faulty.

Let me know if you have questions.

Joe