All values measured to ground unless otherwise noted
Conn./Plug/Pin Pin Information Test Value Comments
H7      
1.1 Pin not used    
1.2 Main ground to W19 Approx. 0 Ohms to ground or
measure to circuit 30 12 VDC
 
1.3 Dome lamp on recognition signal input,
disables dimming function with E15 activated
Switch on dome lamp 12 VDC
mirror surface becomes lighter
 
1.4 pin not used    
1.5 Circuit 15 main power input Ignition on 12VDC Feed from F1f23
1.6-8 pins not used    
2.1 Backup recognition signal input,
disables dimming function in backup mode
Ignition on, gear shift lever in position R 12VDC, mirror surface becomes lighter  
2.2

2.3
Dimming voltage output (+)

Dimming voltage output (-)
Ignition on, interior lighting off:
0 - 1.5 VDC to pin 1.2 depending on dimming conditions
 
Note Dimming functionally test Cover daylight sensor, on windshield side of mirror, interior mirror surface becomes dark with flashlight shining towards mirror Domelamp must be off