GM Service Manual Online
For 1990-2009 cars only

Vehicle Interface Unit (VIU), C1


Object Number: 258912  Size: CH

Connector Part Information

    • 12110113
    • 32-Way F Micro-Pack 150 Series RED

Pin

Wire Color

Circuit No.

Function

A1

--

--

Not Used

A2

BRN/WHT

XM900

Class 2 Serial Data -

A3-A5

--

--

Not Used

A6

WHT

M160

Ground

WHT

M901

Ground

A7

--

--

Not Used

A8

ORN/BLK

XM160

Power

ORN/BLK

XM901

Power

A9

BARE

S94

Audio Shield

BARE

S93

Audio Shield

A10

BLK

F900

XCVR Audio GND

A11

WHT

M900

XCVR RX Audio

A12

BLU

P900

XCVR TX Audio

A13

BARE

S92

Audio Shield

A14

BRN/GRY

XR901

XCVR MIC IN

A15

BARE

S91

Audio Shield

A16

RED

A900

XCVR BATT

B1-B8

--

--

Not Used

B9

BRN/GRY

XR900

MIC IN

B10

BARE

S90

GND

B11

BRN/WHT

XM902

XCVR RCV Data

B12

BRN/YEL

XB900

XCVR CMP Data

B13

BRN/RED

XA900

XCVR TRU Data

B14

RED/WHT

AM900

XCVR DIG GND

B15

BRN

X900

XCVR IGN

B16

--

--

Not Used

Vehicle Interface Unit (VIU), C2


Object Number: 73222  Size: CH

Connector Part Information

    • 12110115
    • 32-Way F Micro-Pack 100 Series BLU

Pin

Wire Color

Circuit No.

Function

E1

BLK

F902

Ground

E2-E3

--

--

Not Used

E4

RED/YEL

AB906

Keypad Signal

E5

RED/YEL

AB905

LED Green

E6

RED/BLU

AP906

PWR

E7-E15

--

--

Not Used

E16

RED

A902

Battery Positive Voltage

F1

BLK

F903

Ground

F2-F3

--

--

Not Used

F4

BLK

F905

GND

F5-F8

--

--

Not Used

F9

RED/WHT

AM905

LED Red

F10-F15

--

--

Not Used

F16

RED

A903

Battery Positive Voltage

Vehicle Communication Unit (VCU)


Object Number: 585586  Size: CH

Connector Part Information

    • 12059028
    • 25-Way F BLK

Pin

Wire Color

Circuit No.

Function

1

BLU

F900

XCVR TX Audio

2

--

--

Not Used

3

RED/WHT

AM900

XCVR DIG GND

4

RED

A900

XCVR BATT

5

BRN

X900

XCVR IGN

6

WHT

M900

XCVR RX Audio

7-10

--

--

Not Used

11

BRN/RED

XA900

XCVR TRU Data

12

BRN/YEL

XB900

XCVR CMP Data

13

--

--

Not Used

14

BARE

S92

Audio Shield

15

BRN/GRY

XR901

XCVR MIC lN

16-17

--

--

Not Used

18

BRN/WHT

XM902

XCVR RCV Data

19-23

--

--

Not Used

24

BLK

F900

XCVR Audio GND

25

--

--

Not Used