Download Keyless Entry/Security Alarm System Control Unit Input Test ’99 Acura 3.2TL – ’99-01 Models 1. Before testing the keyless entry/security control functions, troubleshoot the multiplex control system. Multiplex Control Unit, Driver’s 2. Remove the driver’s multiplex control unit from the driver’s under-dash fuse/relay box. 3. 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. 4. With the driver’s multiplex control unit still disconnected, make these input tests at the connector and driver’s under-dash fuse/relay box sockets. If any test indicates a problem, find and correct the cause, then recheck the system. If all the input tests prove OK go to step 5. Cavity B11 Wire BLK Test condition Under all conditions Check for continuity to ground:There should be continuity. Test: Desired result A12 Fuse/relay Under all conditions Check for voltage to box socket ground:There should be battery voltage.