Control Unit Input Test

Before testing the driving position memory control functions, troubleshoot the multiplex control system. Perform the multiplex mode test first.
Multiplex Control Unit, Passenger's:
Remove the passenger's multiplex control unit from the passenger's under-dash fuse/relay box, and disconnect its connector.
Inspect all 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 Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 2: Identifying Multiplex Control Unit, Passenger's Connector B Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 3: Identifying Passenger's Under-Dash Fuse/Relay Box Connector A Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 4: Identifying Passenger's Under-Dash Fuse/Relay Box Connector H Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.
With the connectors still disconnected, make these input tests at the connectors.
- 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.
Fig 5: Passenger's Multiplex Control Unit Input Test (1 Of 2)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 6: Passenger's Multiplex Control Unit Input Test (2 Of 2)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 7: Identifying Multiplex Control Unit, Passenger's Connector B Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Reconnect the passenger's multiplex control unit to the passenger's under-dash fuse/relay box, and make these input tests at the appropriate connectors on the passenger's under-dash fuse/relay box.
- 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 6.
Fig 8: Passenger's Under-Dash Fuse/Relay Box Input Test
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Multiplex control Unit, Driver's:
Remove the driver's unit from the driver's under-dash fuse/relay box, and disconnect its connector.
Inspect all 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 8.
Fig 9: Identifying Fuse/Relay Box Socket Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 10: Identifying Multiplex Control Unit, Driver's Connector B Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 11: Identifying Driver's Under-Dash Fuse/Relay Box Connector A Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 12: Identifying Driver's Under-Dash Fuse/Relay Box Connector E Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 13: Identifying Driver's Under-Dash Fuse/Relay Box Connector Q Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.
With the driver's multiplex control unit still disconnected, make these input tests at the connectors.
- 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 9.
Fig 14: Driver's Multiplex Control Unit Input Test
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Reconnect the driver's multiplex control unit to the driver's under-dash fuse/relay box, and make these input tests at the appropriate connectors on the driver's under-dash fuse/relay box.
- 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 10.
Fig 15: Driver's Under-Dash Fuse/Relay Box Input Test
Courtesy of AMERICAN HONDA MOTOR CO., INC.
If all the input tests prove OK, one of the control units must be faulty, Substitute a known-good control unit for the one that is most likely at fault, then recheck the system. If the system works properly, the original control unit is faulty; replace it. If there is still a malfunction, substitute a known-good control unit for the next most likely unit to be at fault, and recheck. If the system works properly, the original unit is faulty; replace it.