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