Honda Accord: System Description
EX-L, EX-L PZEV models
The automatic dimming Inside mirror has a front-facing lux level sensor (A), rear-facing lux level sensors (B), and a control unit. The control unit receives signals from each sensor. Based on the difference between the two lux levels (the light outside the vehicle and the light from the headlights of the other vehicle, etc.), the control unit controls the electro-chromic gel to reduce glare. This dimming function is canceled when the transmission is in reverse, or when the automatic dimming off button (C) Is turned OFF.

Circuit Diagram
...
Test/Replacement
EX-L, EX-L PZEV models
1. Remove the cover (A), then disconnect BP connector
(B).
2. Turn the ignition switch to ON (II).
3. Measure the voltage between terminal No. 2 and
body ground.
вР...
See also:
Charging the Battery
Disconnect both battery cables to prevent damaging your vehicle's electrical
system.
Always disconnect the negative (–) cable first, and reconnect it last. ...
Auxiliary Input Jack
Use the jack to connect standard audio devices.
1. Open the AUX cover.
2. Connect a standard audio device to the
input jack using a 1/8 inch (3.5 mm) stereo
miniplug.
- The audio syst ...