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Test 2

  1. Ensure ignition is off. Check continuity in communication line (Brown/White wire) between driver's multiplex control unit Gray 26-pin connector terminal B9 and passenger's multiplex control unit Gray 26-pin connector terminal A22. If continuity does not exist, check for open in Brown/White wire. If continuity exists, go to next step.
  2. Turn ignition on. Using a voltmeter, check communication line voltage at driver's multiplex control unit Gray 26-pin connector terminal B9 (Brown/White wire). Voltage should read 4.2-6.6 volts. If voltage is as specified, replace door multiplex control unit with a known-good unit and retest system. If voltage is not as specified, go to next step.
  3. If voltage is more than 6.6 volts, check for short in Brown/White wire and for poor connection or faulty circuit at receiver side unit. See WIRING DIAGRAMS. If voltage is less than 4.2 volts, check for short to ground and for poor connection or faulty circuit at transmitter side unit.
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