Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSACURA19983.5RL SPECIAL EDITIONREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESMULTIPLEX CONTROL SYSTEMSSYSTEM TESTSDIAGNOSTIC TESTSTEST 2
1998 Acura 3.5RL Special Edition
Test 2
1998 Acura 3.5RL Special EditionSECTION Test 2
- 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.
- 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.
- If voltage is more than 6.6 volts, check for short in Brown/White wire and for poor connection or faulty circuit at receiver 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 unit.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.