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relay wiring quagmire, need help :- { 200

posted by  Volvodad on  Mon Jun 28 18:36 CST 2004
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last visit: Thu Oct 23 16:18 CST 2014
[RELATED]

Porkface/Chuck - I think we're going down the wrong Bunny Trail here because Chris used "CIS" where it should have been "CI". CI is Volvo's shorthand for the Continuous Injection system, so I think that's what he refers to - a bad computer in the O2 sensor/frequency valve loop.

There is indeed a separate, small "CIS" (Constant Idle Speed) computer on these K-jet cars, and as you point out, all it does is drive the IAC motor depending on the RPM signals it gets from the coil primary, plus the coolant temp sensor, and A/C microswitch.
--
Bob (son's 81-244GL B21F, dtr's 83-244DL B23F, "my" 94-944 B230FD; plus wifemobile Dodge minivan, hobbycar MGB, and numerous old motorcycles)






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