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Door-To-Driver's Multiplex Control Unit

  1. Turn ignition off. Check continuity in communication line (Brown wire) between door multiplex control unit harness connector terminal F4 and driver's multiplex control unit harness connector terminal B8. See WIRING DIAGRAMS  . If continuity exists, go to next step. If continuity does not exist, repair open in Brown wire. After repairs, recheck DTCs.
  2. Turn ignition on. Check voltage in communication line (Brown wire) between ground and door multiplex control unit harness connector terminal F4, and driver's multiplex control unit harness connector terminal B8. See WIRING DIAGRAMS  . Voltage should be 3.5-9.5 volts. If voltage is not as specified, go to next step.
  3. If voltage is greater than 9.5 volts, check for short in circuit to another wire, poor contact or faulty circuit at connector on receiver side unit. If voltage is less than 3.5 volts, check circuit for short to ground or another wire. Check for poor contact or faulty circuit at connector on transmitter side unit. Repair as necessary. After repairs, recheck DTCs.
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