Operation CHARM: Car repair manuals for everyone.

Communications Control Module






Telephone/Telematics Control Module, Connector Assignments

Telephone/Telematics Control Module, connector view





1 Connection - GPS antenna
2 42-pin connector
3 Connection - Telematics antenna

Telephone/Telematics Control Module, multi-pin connector assignments

Terminals which are not listed are vacant/unassigned.

42-pin, multi-pin connection - T42





1 Horn
2 Door lock
3 Cellular telephone - audio input
4 Cellular telephone - battery feedback
5 Cellular telephone - Ground (GND)
6 Cellular telephone - Transmit (RS232)
7 Cellular telephone - Line 1 (Tx)
8 Cellular telephone - shielded Ground (GND)
9 CAN-Bus High - Infotainment
10 Audio out - ( + )
11 Emergency speaker - ( + )
12 Inside microphone - ( + )
13 Data Link Connector (DLC)
14 Switched positive - Terminal X
15 LED - Red
16 LED - Green
18 Ground (GND) - Terminal 31
19 Ground (GND) - Terminal 31

42-pin, multi-pin connection - T42, continued





22 Lights
23 Door unlock
24 Cellular telephone Audio Output
25 Cellular telephone - Audio Ground
26 Cellular telephone - Power
27 Cellular telephone - Receive (RS232)
28 Cellular telephone - Line 2 (Rx)
29 Cellular telephone - Hook Switch
30 CAN Bus - Low - Infotainment
31 Audio out
32 Emergency Speaker - ( - )
33 Inside microphone - ( - )
34 Mute
35 Keypad In
36 Keypad Power
38 Airbag (Crash) Line output
39 Battery positive (B+) - Terminal 30
40 Battery positive (B+) - Terminal 30
41 Backup battery - ( + )
42 Backup battery - ( + )