Cellular Communication Connector End Views

WARNING: This page is about a different car, the 2004 Cadillac SRX. However, it is still accessible from the selected car via links, so may be relevant.

Inside Rearview Mirror (ISRVM) Terminal Identification

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		917981-2 16-Way M Amp .040/.070 Hybrid (BK)
Pin	Wire Color	Circuit No.	Function
1	-	-	Not Used
2	BARE	1782	Drain Wire
3-4	-	-	Not Used
5	GY	1690	Automatic Day/Night Mirror Signal
6-7	-	-	Not Used
8	BK/WH	1051	Ground
9	L-GN	24	Backup Lamp Supply Voltage
10	GY	655	Cellular Microphone Signal (UE1)
11	PU	679	Keypad Signal (UE1)
12	BN	1941	Keypad Supply Voltage
13	PK	1339	Ignition 1 Voltage
14	GY/BK	1798	Keypad Green LED Signal (UE1)
15	PU	1156	Keypad Red LED Signal (UE1)
16	PK	1691	Automatic Day/Night Mirror Low Reference

Vehicle Communication Interface Module (VCIM), C1 Terminal Identification

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		917981-1 16-Way M MKII Hybrid (WH)
Pin	Wire Color	Circuit No.	Function
1	-	-	Not Used
2	PU	1156	Keypad Red LED Signal
3	GY/BK	1798	Keypad Green LED Signal
4-5	-	-	Not Used
6	BN	1941	Keypad Supply Voltage
7	BK/WH	851	Ground
8-10	-	-	Not Used
11	PU	679	Keypad Signal
12-14	-	-	Not Used
15	RD/WH	2240	Battery Positive Voltage
16	-	-	Not Used

Vehicle Communication Interface Module (VCIM), C2 Terminal Identification

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		917975-1 12-Way M MKII Hybrid (WH)
Pin	Wire Color	Circuit No.	Function
1	D-BU	658	Cellular Telephone Voice Signal
2	L-BU/BK	659	Cellular Telephone Voice Low Reference
3-5	-	-	Not Used
6	PU	1807	Class 2 Serial Data
7	-	-	Not Used
8	BARE	814	Shield
9	GY	655	Cellular Microphone Signal
10	BARE	1782	Drain Wire
11-12	-	-	Not Used

Vehicle Communication Interface Module (VCIM), C3 Terminal Identification

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		917983-2 16-Way M MKII Hybrid (BK)
Pin	Wire Color	Circuit No.	Function
1	-	-	Not Used
2	PK	5149	Voice In Signal
3	-	-	Not Used
4	PK/BK	5152	Return Voice In Signal
5	BARE	1792	Drain Wire
6-16	-	-	Not Used