MDX V6-3471cc 3.5L (2002)
12. Reconnect the connector to the door multiplex control unit, and make the input test at the connector.
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If a test indicates a problem, find and correct the cause, then recheck the system.
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If the input test proves OK, go to step 13.
13. If all the input tests prove OK, one of the control units must be faulty. Substitute a known-good control unit for the one that is most likely at fault,
then recheck the system. If the system works properly, the original control unit is faulty; replace it. If there is still a malfunction, substitute a
known-good control unit for the next most likely unit to be at fault, and recheck. If the system works properly, the original unit is faulty; replace it.
