1998 Boxster Secondary Air Pump

[bagpiperse]

Thanks for those replies.

So, I think I left out some information. The secondary air pump is not coming on at cold start-up. It does work, as verified by giving it power directly from the battery.

I have checked the fuse and put a new relay in, and checked the wiring from the relay to the pump.

Thanks for the information regarding how the system works. I don't know where the engine temp sensor is to check it. I did some searching around on the internet, but didn't find anything saying where the sensor is or how to check it.

I don't know where the ECU is either, or how to check if it is sending the signal to the relay. Thanks again.