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
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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.
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See also:
Symptom Troubleshooting
Loiw tire pressure Indicator does not come on,
and no DTCs are stored
NOTE: Check for gauge DTCs with the HDS (see page
22-3). If gauge DTCs are stored, troubleshoot those DTCs
first.
1. Turn t ...
Switch Test/Replacement
1. Separate the lumbar support switch cover (A) from
the switch (B).
2. Disconnect the 5P connector (C) from the switch.
3. Check for continuity between the terminals in each
switch position a ...
Synchro Ring and Gear Inspection
1. Inspect the synchro rings for scoring, cracks, and
damage (A).
Example of synchro ring teeth
2. Inspect the inside of each synchro ring (B) for wear.
Inspect the ...