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Driver's-To-Passenger's Multiplex Control Unit

  1. Turn ignition off. Check continuity in communication line (Light Green wire) between driver's multiplex control unit harness connector terminal D1 and passenger's multiplex control unit harness connector terminal B1. See WIRING DIAGRAMS  . If continuity exists, go to next step. If continuity does not exist, repair open in Light Green wire. After repairs, recheck DTCs.
  2. Turn ignition on. Check voltage in communication line (Light Green wire) between ground and driver's multiplex control unit harness connector terminal D1 and passenger's multiplex control unit harness connector terminal B1. See WIRING DIAGRAMS  . Voltage should be 4-10.5 volts. If voltage is not as specified, go to next step.
  3. If voltage is greater than 10.5 volts, check for short to another circuit or poor contact or faulty circuit at connector on receiver side unit. If voltage is less than 4 volts, check for short to ground or short to another wire in circuit. Check for poor contact or faulty circuit at connector on transmitter side unit. Repair as necessary. After repairs, recheck DTCs.
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