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Secondary Air System Issue 850 1997

posted by  David Samuels on  Thu Dec 31 09:00 CST 2020
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last visit: Mon Oct 20 12:23 CST 2014
[RELATED]

Thanks Bill. I'm familiar with that article! One thing I forgot, is this:

"The Motronic 4.4 MFI controls the pump relay and solenoid valve using separate outputs from the engine control module (ECM). "

This jives with the one post I found with the same symptoms I have, solenoid activating, but no pump running, and a bad ECU. I take exception to the part about the system not activating until the car has been driven, as I'm sure I've heard the pumps run on cold mornings with the car just started in the driveway--at least I think. Regardless, it doesn't run even after the car has been at 10 mph. The relay isn't getting a ground signal at all.

Can you suggest a site where I can find a pinout for the ECU? It is 4.4, as it's NA. I want to see if I can trace all the grounds before I buy an ECU.

Thanks for the pin numbers. DS






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