DTC  | Description  | 
|---|---|
12  | Diagnostic system check  | 
21/31  | Courtesy lamps feed (circuit shorted to ground)  | 
22/32  | Courtesy lamps return (circuit shorted to B+)  | 
23/33  | Retained accessory power (circuit shorted to ground or B+)  | 
24/34  | FASTEN SEATBELT indicator lamp (circuit shorted to ground or B+)  | 
41  | Last transmitter message received valid  | 
42  | Last transmitter message received had invalid ID  | 
43  | Last transmitter message received had sumcheck error  | 
44  | Last transmitter message received had encryption error  | 
45  | Receiver processing currently in 20 second lockout  | 
55  | Begin configuration display  |