Hummer H2. Manual - part 210

OnStar Button Assembly - Terminal Identification 

Connector Part Information

z

12047662  

z

2-Way F Metri-Pack 150 Series (BK)  

Pin

Wire Color

Circuit No.

Function

A

BARE

514

Ground

B

GY

655

Cellular Microphone Signal

Connector Part Information

z

12047886  

z

8-Way F Metri-Pack 150 Series (BK)  

Pin

Wire Color

Circuit No.

Function

A

L-GN/BK

2515

Keypad Supply Voltage

B

D-GN/WH

2514

Keypad Signal

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Cellular Communication - Hummer H2

  

Vehicle Communication Interface Module (VCIM) - Terminal Identification - C1 

Vehicle Communication Interface Module (VCIM) - Terminal Identification - C2 

C-D

-

-

Not Used

E

OG/BK

2518

Keypad Ground

F

YE/BK

2516

Keypad Green LED Signal

G

BN/WH

2517

Keypad Red LED Signal

H

-

-

Not Used

Connector Part Information

z

15383038  

z

16-Way F 040II (WH)  

Pin

Wire Color

Circuit No.

Function

1

-

-

Not Used

2

BN/WH

2517

Keypad Red LED Signal

3

YE/BK

2516

Keypad Green LED Signal

4

-

-

Not Used

5

OG/BK

2518

Keypad Ground

6

L-GN/BK

2515

Keypad Supply Voltage

7

BK/WH

1851

Ground

8

BK/WH

1851

Ground

9-10

-

-

Not Used

11

D-GN/WH

2514

Keypad Signal

12-14

-

-

Not Used

15

OG

3240

Battery Positive Voltage

16

OG

3240

Battery Positive Voltage

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Cellular Communication - Hummer H2

  

DIAGNOSTIC INFORMATION AND PROCEDURES 

DIAGNOSTIC STARTING POINT - CELLULAR COMMUNICATION 

Begin the system diagnosis with Diagnostic System Check - Cellular Communication . The Diagnostic 
System Check will provide the following information: 

z

The identification of the control modules which command the system  

z

The ability of the control modules to communicate through the serial data circuit  

z

The identification of any stored diagnostic trouble codes (DTCs) and their status  

The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and 
where the procedure is located. 

DIAGNOSTIC SYSTEM CHECK - CELLULAR COMMUNICATION 

Connector Part Information

z

15383039  

z

12-Way F 040II (WH)  

Pin

Wire Color

Circuit No.

Function

1

PK/BK

2062

Cellular Telephone Voice Signal

2

OG/BK

2061

Cellular Telephone Low Reference

3-4

-

-

Not Used

5

YE

1127

Trip Computer/Nav Class 2 Serial Data

6-7

-

-

Not Used

8

BARE

1792

Drain Wire

9

GY

655

Cellular Microphone Signal

10

BARE

514

Ground

11-12

-

-

Not Used

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Cellular Communication - Hummer H2

  

Test Description 

The numbers below refer to the step numbers on the diagnostic table. 

2: Lack of communication may be due to a partial malfunction or a total malfunction of the class 2 serial 
data circuit. The specified procedure will determine the condition.  

5: The presence of DTCs which begin with "U" indicate some other system control module is not 
communicating.  

Diagnostic System Check - Cellular Communication 

Step

Action

Yes

No

1

Install a scan tool. 
Does the scan tool power up?

Go to Step 2

Go to Scan Tool Does 

Not Power Up in Data 

Link Communications

2

1. Turn ON the ignition, with the engine OFF.  

2. Attempt to establish communication with the 

vehicle communication interface module 
(VCIM).  

Does the scan tool communicate with the VCIM?

Go to Step 3

Go to Scan Tool Does 

Not Communicate with 

Class 2 Device in Data 

Link Communications

3

1. Access the class 2 Power Mode in the 

Diagnostic Circuit Check on the scan tool.  

2. Rotate the ignition switch through all 

positions while observing the ignition switch 
power mode parameter.  

Does the ignition switch parameter reading match 
the ignition switch position for all switch positions?

IMPORTANT:

The engine may start during the following step. 
Turn OFF the engine as soon as you have 
observed the Crank power mode.

Go to Step 4

Go to Power Mode 

Mismatch in Body 

Control System

4

Select the display DTCs function on the scan 
tool.Does the scan tool display any DTCs?

IMPORTANT:

This vehicle will be equipped with one of 2 
OnStar(R) systems, generation 5 or generation 6. 
Id information, module information 2 screen on 
the scan tool to determine which system the 
vehicle is using. The coordinating diagnostic 
procedures should be used.

Go to Step 5

Go to OnStar Symptom 

Diagnosis

5

Does the scan tool display any DTCs which begin 
with a "U"?

Go to Step 6

Go to Step 7

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Cellular Communication - Hummer H2