Control Unit Input Test

WARNING: This page is about a different car, the 2003 Acura 3.2CL and 2002 Acura 3.2CL. However, it is still accessible from the selected car via links, so may be relevant.

Before testing, troubleshoot the multiplex control system (see TROUBLESHOOTING ).
Multiplex Control Unit, Driver's
Remove the driver's multiplex control unit from the driver's under-dash fuse/relay box.
Inspect the connector and socket terminals to be sure they are all making good contact.
- If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
- If the terminals look OK, go to step 4.
Fig 1: Identifying Fuse/Relay Box Socket (Driver's Multiplex Control Unit, Connector A) Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 2: Identifying Multiplex Control Unit, Driver's Connector B Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Make these input tests at the fuse/relay box socket and the multiplex connector B.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, the control unit must be faulty; replace it.
Fig 3: Fuse/Relay Box Socket & Multiplex Connector B Input Tests
Courtesy of AMERICAN HONDA MOTOR CO., INC.