Acura RL (1996-2004 year). Manual - part 100
130-4
Power Door Locks/Keyless Entry
How the Circuit Works
Power Door Locks
The power door locks system includes the
passenger’s multiplex control unit, driver’s multiplex
control unit, door multiplex control unit, and keyless
receiver unit. Battery voltage is applied through fuse
44 at all times to the passenger’s multiplex control
unit and the keyless receiver unit. The passenger’s
multiplex control unit, driver’s multiplex control unit,
and door multiplex control unit communicate with
each other through the BRN/WHT D-A line,
RED/YEL A-D line, BRN/YEL door D-line, and
PNK/BLU wakeup line.
When you turn the key in the driver’s door to the
unlock position, a ground signal is sent to the door
multiplex control unit. If you hold the key in the
unlock position for more than 1 second, all doors
will unlock.
Each door has a knob switch input and a door
switch input to either the passenger’s multiplex
control unit, driver’s multiplex control unit, or door
multiplex control unit. The multiplex control units
use these inputs to control the door key cylinder
switch in each front door.
Keyless Entry
You can also unlock the doors and trunk with the
remote transmitter. When you press the UNLOCK
button on the transmitter, the driver’s door will
unlock. When you press the button again, the
other doors will unlock. The doors will relock
automatically after 30 seconds if a door is not
opened or if the key is not in the ignition switch.
If the key is in the ignition switch, the remote
transmitter will not lock the doors.
Refer to the Service Manual (Section 23, Electrical)
for specific tests and troubleshooting procedures.
2004 American Honda Motor Co., Inc.
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