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Home >> Isuzu >> 1998 >> Oasis LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 14 (Multiplex Control Systems) >> System Tests >> Communication Line Tests >> Door-To-Driver's Multiplex Control Unit
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Door-To-Driver's Multiplex Control Unit

WARNING: This page is about a different car, the 1998 Honda Prelude. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition off. Check continuity in communication line between door multiplex control unit harness connector terminal A15 (Brown wire) and driver's multiplex control unit harness connector terminal A2 (Brown wire). 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 between ground and door multiplex control unit harness connector terminal A15 (Brown wire) and driver's multiplex control unit harness connector terminal A2 (Brown wire). 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 or poor contact or faulty circuit at connector on receiver side of unit. If voltage is less than 3.5 volts, check for short to ground or short to another wire in circuit. Check for poor contact or faulty circuit at connector on transmit side of unit. Repair as necessary. After repairs, recheck DTCs.
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