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bagpiperse · 08-24-2018, 04:29 AM

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.

08-24-2018, 04:29 AM	#13
bagpiperse Registered User Join Date: Aug 2018 Location: Albuquerque Posts: 8	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.