Quote:
Originally Posted by Brett San Diego
Interesting thought. For what it's worth, the function diagram of the ECU's and all their inputs and outputs shows the OBDII connector associated only with the left side ECU (bank 2). The 38-pin diagnostic connector is associated with both. Now, it's possible that is just an oversight in the diagram.
Brett
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Brett, Jeff I believe this is not oversight. I checked ETM for 96 S600 and only N3/12 Right ECU connected directly to the OBD2 connector and Check Engine light. Probably it generates a CEL on behalf of the other ECU. It means direct OBD2 communication is only possible with Right ECU. The Left side ECU N3/11 has to send all information to N3/12 over the CAN.
Jeff this is on the scanned page I emailed you.
Mike