MDX V6-3471cc 3.5L (2002)
NOTE: When testing the door lock knob switches, make sure all three passenger doors are locked. After unlocking the door, make sure to return
the door lock knob switch to the lock position, otherwise the test results will be inaccurate.
The key cylinder switches should only beep/flash when turned to LOCK or UNLOCK. If they beep/flash when returning to the center position, the
switch is defective or misaligned. Adjust or replace the affected key cylinder switch.
16. Check 2 or 3 more circuits listed for that control unit.
Does the ignition key light blink and the beeper beep for each additional circuit?
YES - The additional circuits are OK. Repair the short or open in the circuit that failed the test in the proceeding step. Refer to the test(s) for that
individual system.
NO - Multiple failed circuits can mean that the control unit has failed, but without triggering a DTC. Test a few more circuits. If they also fail,
substitute a known-good control unit, then recheck. 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 faulty control unit, then recheck. If the system works properly, that
control unit is faulty; replace it.
