Hummer H3. Manual — part 1194

To setup the digital radio receiver, complete the setup procedure under the Special Functions
menu of the scan tool, then cycle ignition.

XM Activation

1. Turn the radio ON, tune to the XM channel 0 and record the radio ID. The radio ID will be

needed for activation of the receiver.

2. From the USA, Call XM radio at 1-800-556-3600 to activate the receiver. From Canada,

call 1-877-438-9677.

3. Park the vehicle outside in an area with an unobstructed view of the southern sky.

4. Leave the vehicle outside with the ignition switch in the ACC position and the radio on for

30 minutes to activate XM service.

5. Once activated, the radio will receive the remaining XM channels.

ONSTAR GLOBAL POSITIONING SYSTEM (GPS) DATA NOT CURRENT OR INACCURATE

Diagnostic Aids

The Global Positioning System (GPS) Signal title on the scan tool will display a Yes or No
dependent upon whether or not the module sees an increment of the seconds transmitted by
GPS signals to the vehicle communication interface module. Upon entering this screen, the
GPS Signal title will automatically display Yes, regardless of the presence of time
increment, for at least 2 seconds, while the algorithm in the scan tool determines the status
of the clock. If increment is found, Yes is continually displayed. If the clock remains static,
No is displayed. The scan tool looks for increment every second, regardless of current
display.

Inaccurate or aged GPS position concerns which are no longer present may have been due
to the temporary loss of GPS signal reception by the vehicle. Conditions such as driving
through tunnels or parking structures while making an OnStar® keypress will restrict the
navigation antenna from a clear view of the satellites in the sky and may have caused this
temporary data loss.

systems:

DTCs

GMLAN and class 2 radio messages

IMPORTANT: After replacement of an XM receiver, call XM radio to deactivate

the receiver that has been removed from the vehicle.

2007 Hummer H3

2007 ACCESSORIES AND EQUIPMENT Cellular, Entertainment and Navigation - H3

OnStar Global Positioning System (GPS) Data Not Current or Inaccurate

Step

Action

Values

Yes

No

Schematic Reference: Radio/Navigation System Schematics
Connector End View Reference: Entertainment/Communication Connector End
Views

1

Did you perform the Diagnostic
System Check - Vehicle?

-

Go to Step 2

Go to
Diagnostic
System
Check -
Vehicle

2

With a scan tool, observe the GPS
signal status indicator in the GPS Data
Display menu, for at least 10
seconds.Does the indicator display
Yes?

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. It is also
necessary to inform the OnStar® Call
Center advisor that this call is for vehicle
diagnostic purposes.

-

Go to Step 3 Go to Step 6

3

1. Press the OnStar® Call Center

button.

2. Ask the OnStar® Call Center

advisor if they have received
GPS data.

Has the advisor received GPS data?

-

Go to Step 4 Go to Step 5

4

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

-

Go to
Diagnostic
Aids

Go to Step

10

Ask the OnStar® Call Center advisor
if this call was a fail to voice.

Contact the
General

2007 Hummer H3

2007 ACCESSORIES AND EQUIPMENT Cellular, Entertainment and Navigation - H3

5

Was the call a fail to voice?

-

Motors
Technical
Assistance
Center

Go to Step 6

6

1. Disconnect the navigation

antenna coax from the navigation
antenna within the wiring
harness.

2. Disconnect the navigation

antenna from the vehicle
communication interface module
(VCIM).

3. Measure the resistance from the

center conductor of the coax to
the metal outer shield.

Does the meter read out of limits?

IMPORTANT:

Vehicle may be equipped with sectioned
coax. Test each section and replace only
the faulty section, not the entire length
or coax.

-

Go to Step 7 Go to Step 8

7

Measure the resistance of the
navigation antenna coax center
conductor from end to end.
Does the resistance measure greater
than the specified value?

1 ohms

Go to Step 8 Go to Step 9

8

Replace the navigation antenna coax.
Did you complete the replacement?

-

Go to Step

11

-

9

Replace the navigation antenna
assembly. Refer to Global
Positioning System (GPS) Antenna
Replacement.
Did you complete the replacement?

-

Go to Step

11

-

10

Replace the VCIM. Refer to Control
Module References for replacement,
setup and programming.
Did you complete the replacement?

-

Go to Step

11

-

2007 Hummer H3

2007 ACCESSORIES AND EQUIPMENT Cellular, Entertainment and Navigation - H3

ONSTAR MICROPHONE INOPERATIVE - CALLER CANNOT BE HEARD

OnStar Microphone Inoperative - Caller Cannot Be Heard

11

Operate the system in order to verify
the repair.
Did you correct the condition?

-

Go to Step 2

-

Step

Action

Value(s)

Yes

No

Schematic Reference: OnStar Schematics
Connector End View Reference: Entertainment/Communication Connector End
Views
DEFINITION: The OnStar® Call Center operator can clearly be heard but the operator is
unable to hear the caller.

1

Did you perform the Diagnostic
System Check - Vehicle?

-

Go to Step 2

Go to
Diagnostic
System
Check -
Vehicle

2

1. Turn ON the ignition, with the

engine OFF.

2. Press the OnStar® Call Center

button.

3. Ask the OnStar® operator if

your voice can clearly be
heard.

Does the OnStar® operator hear
your voice?

-

Go to Testing
for
Intermittent
Conditions
and Poor
Connections

Go to Step 3

3

1. Turn OFF the ignition.

2. Disconnect the cellular

microphone connector.

3. Turn ON the ignition, with the

engine OFF.

4. Measure the voltage from the

cellular microphone signal
circuit to a good ground.

Does the voltage measure greater

9 V

2007 Hummer H3

2007 ACCESSORIES AND EQUIPMENT Cellular, Entertainment and Navigation - H3