Hummer H2. Manual - part 215

 

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Hummer H2. Manual - part 215

 

 

white dot button?

Go to Step 4

Buttons Inoperative

4

After the OnStar(R) keypress, does 
both the radio mute and is the 
Connecting to OnStar message heard 
playing through the audio system?

Go to Step 5

Go to No (or Noisy) OnStar Audio

5

1. Press the OnStar(R) Call Center 

button.  

2. Wait for the system to either 

connect or end the call.  

Is a connection made with OnStar(R)?

IMPORTANT:

It is important to have the vehicle in 
an open outside area where a 
cellular call can be successfully 
placed and Global Positioning 
System (GPS) data can be received 
from satellites.

Go to Step 6

Go to Step 9

6

Ask the OnStar(R) Call Center advisor 
if your voice can clearly be 
heard.Does the advisor clearly hear 
your voice?

IMPORTANT:

It is necessary to inform the OnStar
(R) Call Center advisor that this call 
is for vehicle diagnostic purposes.

Go to Step 7

Go to Microphone Inoperative - 

Caller Cannot Be Heard

7

Ask the OnStar(R) Call Center advisor 
if they have received any data from the 
customer vehicle. 
Did data transfer of the OnStar(R) call 
occur?

Go to Step 8

Go to Step 11

8

Ask the OnStar(R) Call Center advisor 
if the vehicle has ever been 
configured. 
Has the vehicle been configured?

Go to Step 10

Go to Step 16

9

Is the audio prompt Unable to Contact 
OnStar(R) heard?

Go to Unable to 

Contact OnStar Call 

Center

Go to Step 12

10

Ask the OnStar(R) Call Center advisor 
to verify the vehicle identification 
number (VIN) which they have on 
record and ensure it matches the actual 
VIN. 
Does the VIN number at the OnStar

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Cellular Communication - Hummer H2

  

SYMPTOMS - CELLULAR COMMUNICATION 

(R) Call Center match the VIN of the 
vehicle?

Go to Step 13

Go to Step 15

11

Ask the OnStar(R) Call Center advisor 
if this call was a fail to voice. 
Was this call a fail to voice?

Use the scan tool to 

access the STID and 
ESN and contact the 

General Motors 

Technical Assistance 

Center

-

12

Is the audio prompt OnStar(R) request 
ended heard?

Go to Diagnostic Aids

-

13

Ask the OnStar(R) Call Center advisor 
to verify your position. 
Is the location provided by the OnStar
(R) Call Center advisor within a 
reasonable distance from the actual 
location of the vehicle?

Go to Step 14

Go to Global Positioning System 

(GPS) Data Not Current or 

Inaccurate

14

Ask the OnStar(R) Call Center advisor 
if the GPS position is marked as 
Current. 
Is the GPS position current?

Go to Step 17

Go to Global Positioning System 

(GPS) Data Not Current or 

Inaccurate

15

Ask the OnStar(R) Call Center advisor 
to update the customer account with 
the correct information. 
Has the customer account been 
updated?

Go to Step 16

-

16

Ask the OnStar(R) Call Center advisor 
to perform a reconfiguration on the 
vehicle. 
Was the reconfiguration successful?

Go to Step 18

Ask the OnStar(R) Call Center 

advisor why the reconfiguration 
was not successful, use the scan 

tool to access the STID and ESN 

and contact the General Motors 

Technical Assistance Center

17

Is the customer concern with the 
inability of the OnStar(R) Call Center 
to perform the remote functions?

Go to OnStar Call 

Center Remote 

Function Requests 

Inoperative

Go to Diagnostic Aids

18

Operate the system in order to verify 
the customer concern has been 
corrected. 
Has the customer concern been 
corrected?

System OK

Go to Step 2

IMPORTANT: The following steps must be completed before using the symptom tables.

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Cellular Communication - Hummer H2

  

1. Perform the Diagnostic System Check - Cellular Communication before using the Symptom Tables in 

order to verify that all of the following are true: 

z

There are no DTCs set.  

z

The control module can communicate via the serial data link.  

2. Review the system operation in order to familiarize yourself with the system functions. Refer to OnStar 

Description and Operation .  

Visual/Physical Inspection 

z

Inspect for aftermarket devices which could affect the operation of the system. Refer to Checking 
Aftermarket Accessories in Wiring Systems.  

z

Inspect the easily accessible or visible system components for obvious damage or conditions which could 
cause the symptom.  

Intermittent 

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for 
Intermittent Conditions and Poor Connections in Wiring Systems. 

Symptom List 

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom: 

z

OnStar One or More Buttons Inoperative  

z

Unable to Contact OnStar Call Center  

z

OnStar Button LED Inoperative  

z

No (or Noisy) OnStar Audio  

z

Microphone Inoperative - Caller Cannot Be Heard  

z

Voice Recognition Inoperative  

z

OnStar Steering Wheel Control Functions Inoperative  

z

Global Positioning System (GPS) Data Not Current or Inaccurate  

z

OnStar Call Center Remote Function Requests Inoperative  

ONSTAR ONE OR MORE BUTTONS INOPERATIVE 

OnStar One or More Buttons Inoperative 

Step

Action

Value

(s)

Yes

No

Schematic Reference:OnStar Schematics 
Connector End View Reference:Cellular Communication Connector End Views

1

Did you perform the Cellular Communication 
Diagnostic System Check?

-

Go to 

Step 2

Go to Diagnostic System 

Check - Cellular 

Communication

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Cellular Communication - Hummer H2

  

2

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

2. Press each OnStar(R) button one at a time.  

Are all buttons inoperative?

IMPORTANT:

Contact the OnStar(R) Call Center first before 
pressing the emergency button in order to notify 
them of the test.

-

Go to 

Step 4

Go to Step 3

3

Are any buttons intermittent or inoperative?

-

Go to 

Step 7

Go to Testing for 

Intermittent Conditions 

and Poor Connections in 

Wiring Systems

4

1. Turn OFF the ignition.  

2. Disconnect the OnStar(R) button assembly.  

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

4. Measure the voltage from the Keypad Supply 

Voltage circuit to a good ground.  

Does the voltage measure greater than the specified 
value?

9 V

Go to 

Step 6

Go to Step 5

5

Test the Keypad Supply Voltage circuit for an open 
or short. Refer to Circuit Testing and Wiring 
Repairs in Wiring Systems. 
Did you find and correct the condition?

-

Go to 

Step 11

Go to Step 8

6

Test the Keypad Signal circuit for an open or short. 
Refer to Circuit Testing and Wiring Repairs in 
Wiring Systems. 
Did you find and correct the condition?

-

Go to 

Step 11

Go to Step 9

7

Inspect for poor connections at the harness 
connector of the OnStar(R) button assembly. Refer 
to Testing for Intermittent Conditions and Poor 
Connections and Connector Repairs in Wiring 
Systems. 
Did you find and correct the condition?

-

Go to 

Step 11

Go to Step 9

8

Inspect for poor connections at the harness 
connector of the VCIM. Refer to Testing for 
Intermittent Conditions and Poor Connections 
and Connector Repairs in Wiring Systems. 
Did you find and correct the condition?

-

Go to 

Step 11

Go to Step 10

9

Replace the OnStar(R) button assembly. Refer to 
OnStar Button Assembly Replacement in 
Stationary Windows. 
Did you complete the replacement?

-

Go to 

Step 11

-

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Cellular Communication - Hummer H2

  

 

 

 

 

 

 

 

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