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.
2002 Acura 3.5RLFACTORY OEM SERVICE PROCEDURE
Passenger's Multiplex Control Unit
- Remove passenger's multiplex control unit from behind right kick panel. Disconnect control unit connectors. Inspect connectors and terminals. Check for bent, loose or corroded terminals. Perform passenger's multiplex control unit input tests. See Fig 1 . Repair as necessary and recheck system operation. If passenger's multiplex control unit inputs are okay, go to next step.
- Reconnect passenger's multiplex control unit. Perform input tests at back of passenger's multiplex control unit connectors (backprobe). See Fig 2 . Repair as necessary. If all tests have proven okay, passenger's multiplex control unit may be faulty. Substitute known-good passenger's multiplex control unit and recheck system operation. If problem still exists, go to DRIVER'S MULTIPLEX CONTROL UNIT .
Factory Service Tools
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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.