| Table 1: | OnStar® Button Assembly |
| Table 2: | OnStar® Microphone |
| Table 3: | Vehicle Communication Unit (VCU) |
| Table 4: | Vehicle Interface Unit (VIU) - C1 |
| Table 5: | Vehicle Interface Unit (VIU) - C2 |
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|---|---|---|---|---|---|---|---|
Connector Part Information |
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Pin | Wire Color | Circuit No. | Function | ||||
A | LT GRN/BLK | 2515 | Keypad Supply Voltage | ||||
B | DK GRN/ WHT | 2514 | Keypad Signal | ||||
C-D | -- | -- | Not Used | ||||
E | ORN/BLK | 2518 | Keypad Low Reference | ||||
F | YEL/BLK | 2516 | Keypad Green LED Signal | ||||
G | BRN/WHT | 2517 | Keypad Red LED Signal | ||||
H | -- | -- | Not Used | ||||
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|---|---|---|---|---|---|---|---|
Connector Part Information |
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Pin | Wire Color | Circuit No. | Function | ||||
A | BARE | 1705 | Drain Wire | ||||
B | GRY | 655 | Cellular Telephone Microphone Signal | ||||
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|---|---|---|---|---|---|---|---|
Connector Part Information |
| ||||||
Pin | Wire Color | Circuit No. | Function | ||||
1 | DK GRN/ WHT | 2507 | Audio Transmit Signal | ||||
2 | -- | -- | Not Used | ||||
3 | GRY | 2520 | Transceiver Low Reference | ||||
4 | ORN | 2240 | Battery Positive Voltage | ||||
5 | PPL/WHT | 2513 | Ignition ON Signal | ||||
6 | BRN/WHT | 2506 | Audio Return Signal | ||||
7-10 | -- | -- | Not Used | ||||
11 | LT BLU/BLK | 2512 | OnStar Serial Data (+) | ||||
12 | DK BLU/ WHT | 2511 | OnStar Serial Data (-) | ||||
13 | -- | -- | Not Used | ||||
14 | BARE | 1792 | Drain Wire | ||||
15 | GRY/BLK | 2508 | Microphone Signal | ||||
16-17 | -- | -- | Not Used | ||||
18 | TAN/BLK | 2510 | OnStar Serial Data Return | ||||
19-23 | -- | -- | Not Used | ||||
24 | LT BLU | 1235 | Audio Low Reference | ||||
25 | -- | -- | Not Used | ||||
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|---|---|---|---|---|---|---|---|
Connector Part Information |
| ||||||
Pin | Wire Color | Circuit No. | Function | ||||
A1 | -- | -- | Not Used | ||||
A2 | GRY | 2289 | Rear HVAC/Audio Class 2 Serial Data | ||||
A3-A5 | -- | -- | Not Used | ||||
A6 | BLK/WHT | 372 | Remote Radio Audio Output (-) | ||||
A7 | -- | -- | Not Used | ||||
A8 | BRN/WHT | 367 | Remote Radio Left Audio Signal | ||||
A9 | BARE | 814 | Drain Wire | ||||
A10 | LT BLU | 1235 | Audio Low Reference | ||||
A11 | BRN | 2506 | Audio Return Signal | ||||
A12 | DK GRN | 2507 | Audio Transmit Signal | ||||
A13 | BARE | 1792 | Drain Wire | ||||
A14 | GRY/BLK | 2508 | Microphone Signal | ||||
A15 | -- | -- | Not Used | ||||
A16 | ORN | 2240 | Battery Positive Voltage | ||||
B1-B8 | -- | -- | Not Used | ||||
B9 | GRY | 655 | Cellular Telephone Microphone Signal | ||||
B10 | BARE | 1705 | Drain Wire | ||||
B11 | TAN | 2510 | OnStar Serial Data Return | ||||
B12 | DK BLU | 2511 | OnStar Serial Data (-) | ||||
B13 | LT BLU | 2512 | OnStar Serial Data (+) | ||||
B14 | GRY | 2520 | Transceiver Low Reference | ||||
B15 | PPL | 2513 | Ignition ON Signal | ||||
B16 | -- | -- | Not Used | ||||
| |||||||
|---|---|---|---|---|---|---|---|
Connector Part Information |
| ||||||
Pin | Wire Color | Circuit No. | Function | ||||
E1-E3 | -- | -- | Not Used | ||||
E4 | DK GRN/WHT | 2514 | Keypad Signal | ||||
E5 | YEL/BLK | 2516 | Keypad Green LED Signal | ||||
E6 | LT GRN/BLK | 2515 | Keypad Supply Voltage | ||||
E7-E15 | -- | -- | Not Used | ||||
E16 | ORN | 2740 | Battery Positive Voltage | ||||
F1 | BLK | 1550 | Ground | ||||
F2-F3 | -- | -- | Not Used | ||||
F4 | ORN/BLK | 2518 | Keypad Low Reference | ||||
F5-F8 | -- | -- | Not Used | ||||
F9 | BRN/WHT | 2517 | Keypad Red LED Signal | ||||
F10-F16 | -- | -- | Not Used | ||||
