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Sorry, I wanted to expand on this a little, then the site went down for maintenance. I know this might be splitting hairs on terminology or just explanation in general.
In a case like this, and I am not sure at what level this model year was in the FSS system, but lets say the oil level sender info is picked up by the ECM. The information on the oil level could then be shared or tramsmitted to the instrument cluster via a CAN line. I know in practice that the later cars would actually transmit the data to the EIS, which acted as a gateway between the Engine CAN and the Interior CAN, these were kept seperate but again the EIS would relay pertinent info from the engine CAN to the instrument cluster.
This car I don't believe has EIS, so would think it has the early FSS system called ASSYST.
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