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Hi my S2 with ignition on only the cooling fan comes on and stays on. What can I check I just disconnected cooling fan control mod as I thought this might be the issue but wasn't. Temp gauge went over half when idling in 107f heat so unsure if other fan is coming on. Cheers
Code P0480 and P0481 was noted
I'm pretty sure it's normal for the fan to come on if you turn on the ignition and the engine is warm. It may even do it cold, I'm not sure, but depending on what you were doing before you observed this, it may be normal.
In the normal case it will turn off after a bit of time. Like 20-30 seconds. If it doesn't, and the engine is cold, and the fan just keeps running for minutes, that's weird.
I'm not sure how P0480/P0481 are actually detected by the ECU, but one mechanism may be that it turns on the fans (or thinks it does), but the coolant temperature doesn't go down. On the 8 it may have another mechanism, like some kind of load reading on the circuit, but long story short, the ECU thinks the fan relays are not working. So while you've disconnected the mod, is it possible you need to reconnect the original wiring?
Here is how the cooling fan controls work in an S2 in tabulated form:
Originally Posted by Loki
I'm pretty sure it's normal for the fan to come on if you turn on the ignition and the engine is warm. It may even do it cold, I'm not sure, but depending on what you were doing before you observed this, it may be normal.
In the normal case it will turn off after a bit of time. Like 20-30 seconds. If it doesn't, and the engine is cold, and the fan just keeps running for minutes, that's weird.
I'm not sure how P0480/P0481 are actually detected by the ECU, but one mechanism may be that it turns on the fans (or thinks it does), but the coolant temperature doesn't go down. On the 8 it may have another mechanism, like some kind of load reading on the circuit, but long story short, the ECU thinks the fan relays are not working. So while you've disconnected the mod, is it possible you need to reconnect the original wiring?
Per service manual, this is how the P0480 and P0481 work:
Naturally, it covers how to repair the codes. It's mostly checking open circuits, shorts, poor connections, etc. ASH8 has the service manuals posted up in this forum.
I've heard of people wiring up a manual switch somewhere in reach of the driver. Any chance the PO did this?
That would be the fans on low mod. I did it. Works great when the AC is off. If this was done, there would be an extra wire running from the switch to the relay box, and another wire running from the switch to ground.
Here is how the cooling fan controls work in an S2 in tabulated form:
Per service manual, this is how the P0480 and P0481 work:
Naturally, it covers how to repair the codes. It's mostly checking open circuits, shorts, poor connections, etc. ASH8 has the service manuals posted up in this forum.
Would you know where cooling fan relay 4 and 5 are ?
