Test D: The Auto Dimming Mirror Does Not Operate Correctly

PINPOINT TEST D: THE AUTO DIMMING MIRROR DOES NOT OPERATE CORRECTLY

D1-D3:

D3 Continued:

D4:

D5:

D6-D7:

D8-D9:

Normal Operation
The auto dimming mirror receives voltage from the central junction box (CJB) through circuit 964 (DB/LG) and is grounded through circuit 57 (BK). When the transmission is in REVERSE, the digital transmission range (TR) sensor sends a voltage signal through circuit 140 (BK/PK) to the auto dimming mirror, which turns the dimming feature off.

Possible Causes
- fuse
- circuit 57 (BK) open
- circuit 140 (BK/PK) open
- circuit 964 (DB/LG) open
- auto-dimming mirror