Date: Sat, 6 Sep 2003 17:24:14 +0100 From: "Adrian England" <adrianospam.moleskinnopsamin.net> Subject: Re: Bosch LH-Jetronic air mass sensor (Saab 9000)
Lance Morgan wrote: > Vesku wrote: > > afaik, the "real" AMM test is a bench environs w/critically controlled > variable airflow, measuring V output (it doesn't appear to be linear). > > The output specs must be out there - either Bosch or commercial AMM > remanufacturing companies - but likely impossible to obtain (even more > so w/the inner working/micro component specs). I don't believe - but > am not sure - that they are in the Saab Factory Manual You're right they are not in Section 2.3 ;) > Section 2:3; Fuel System - Fuel Injection 81-93; PN 03 48 425 > > > From "Bosch Fuel Injection and Engine Management" by Charles O. > Probst; ISBN: 0837603005 > > "With engine running at normal temperature, the voltage should > typically read 2.12 V at 760 RPM, and increase to 2.83 V at 3520 RPM. > Changes are more important than the actual numbers." > > From http://www.scotsglen.com/saab/ecu/ [AMM input to ECU: 2.0V - > Idling, 5.0V - Full Load] & Bentley wiring diagrams, for LH 2.2, AMM V > output (same as input to ECU) should be measured at AMM pin/harness #5 > > It sounds like you've already swapped in another AMM, from a > good-running car, and it fixed the problem car (which is what most pro > shops do to AMM, afaik) > > In some locales 005s are moderately easy to find & fairly inexpensive > - but perhaps not where you are located - but getting yet a 3rd used > whole AMM would probably be the best course out > > hth > Lance -- take off "ospam" to mail me
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