Operation CHARM: Car repair manuals for everyone.

General Information

The Body Control Module (BCM) is capable of producing four audible reminder tones or chimes (originated from inside the BCM) that can be heard inside the passenger compartment. If more than one chime is required (2 functions or more) at a point in time, only the chime with the highest priority will be active. The chime output has a frequency of 690Hz +/- 69Hz and is capable of three repetition rates of 50/min, 100/min and 150/min. The following functions will have a chime to alert the driver of specific conditions. Chime rates listed in order of priority:
1. Headlamp reminder - 150 chimes per min.
2. Key In reminder - 100 chimes per min.
3. Turn signal reminder - will chime at the turn signal flasher rate.
4. Seat belt reminder - 50 chimes per min.

Power is provided to the BCM via the BCM, IGN 1, and cruise fuses. The power circuits are CKT 1140 (WHT), CKT 39 (PNK) and CKT 41 (BRN) respectively. The ground circuits are provided via CKT 238 (BLK/WHT) and CKT 1850 (BLK) which terminate at G304 and G203 respectively.