| Table 1: | Vehicle Communication Unit (VCU) |
| Table 2: | Vehicle Interface Unit (VIU) C1 |
| Table 3: | Vehicle Interface Unit (VIU) C2 |
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Connector Part Information |
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Pin | Wire Color | Circuit No. | Function | ||||
1 | DK GRN/WHT | 2507 | Transceiver Audio Transmit Signal | ||||
2 | -- | -- | Not Used | ||||
3 | GRY/BLK | 2520 | Transceiver Digital Low Reference | ||||
4 | ORN | 2540 | Transceiver Battery Positive Voltage | ||||
5 | PPL/WHT | 2513 | Transceiver Ignition Sense Signal | ||||
6 | BRN/WHT | 2506 | Transceiver Audio Return Signal | ||||
7 - 10 | -- | -- | Not Used | ||||
11 | LT BLU/BLK | 2512 | Transceiver TRU Signal | ||||
12 | WHT | 2511 | Transceiver CMP Signal | ||||
13 | -- | -- | Not Used | ||||
14 | BARE | 1792 | Transceiver Microphone Drain Wire | ||||
15 | GRY/BLK | 2508 | Transceiver Microphone Signal | ||||
16 - 17 | -- | -- | Not Used | ||||
18 | TAN/BLK | 2510 | Transceiver RTN Signal | ||||
19 - 23 | -- | -- | Not Used | ||||
24 | LT BLU | 1235 | Transceiver Audio Low Reference | ||||
25 | -- | -- | Not Used | ||||
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|---|---|---|---|---|---|---|---|
Connector Part Information |
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Pin | Wire Color | Circuit No. | Function | ||||
A1 | -- | -- | Not Used | ||||
A2 | PPL | 1807 | Class 2 Serial Data | ||||
A3 - A5 | -- | -- | Not Used | ||||
A6 | BLK/WHT | 659 | Voice Low Reference | ||||
A7 | -- | -- | Not Used | ||||
A8 | BRN/WHT | 658 | Voice Signal | ||||
A9 | BARE | 814 | Voice Signal Drain Wire | ||||
A10 | LT BLU | 1235 | Transceiver Audio Low Reference | ||||
A11 | BRN/WHT | 2506 | Transceiver Audio Return Signal | ||||
A12 | DK GRN/WHT | 2507 | Transceiver Audio Transmit Signal | ||||
A13 | BARE | 1792 | Transceiver Microphone Drain Wire | ||||
A14 | GRY/BLK | 2508 | Transceiver Microphone Signal | ||||
A15 | BARE | 1782 | Transceiver Audio Drain Wire | ||||
A16 | ORN | 2240 | Transceiver Battery Positive Voltage | ||||
B1 - B8 | -- | -- | Not Used | ||||
B9 | GRY | 655 | Microphone Signal | ||||
B10 | BARE | 814 | Microphone Drain Wire | ||||
B11 | TAN/BLK | 2510 | Transceiver RTN Signal | ||||
B12 | WHT | 2511 | Transceiver CMP Signal | ||||
B13 | LT BLU/BLK | 2512 | Transceiver TRU Signal | ||||
B14 | GRY/BLK | 2520 | Transceiver Digital Low Reference | ||||
B15 | PPL/WHT | 2513 | Transceiver Ignition Sense Signal | ||||
B16 | -- | -- | Not Used | ||||
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|---|---|---|---|---|---|---|---|
Connector Part Information |
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Pin | Wire Color | Circuit No. | Function | ||||
E1 | BLK | 1050 | Ground | ||||
E2 - E3 | -- | -- | Not Used | ||||
E4 | DK GRN/WHT | 2514 | OnStar® Keypad Control Signal | ||||
E5 | YEL/BLK | 2516 | OnStar® Keypad Green LED Signal | ||||
E6 | LT GRN/BLK | 2515 | OnStar® Keypad Power Signal | ||||
E7 - E15 | -- | -- | Not Used | ||||
E16 | ORN | 2240 | Battery Positive Voltage | ||||
F1 | BLK | 1050 | Ground | ||||
F2 - F8 | -- | -- | Not Used | ||||
F9 | BRN/WHT | 2517 | OnStar® Keypad Red LED Signal | ||||
F10 - F15 | -- | -- | Not Used | ||||
F16 | ORN | 2240 | Battery Positive Voltage | ||||
