Hummer H3. Manual — part 1196

ONSTAR BUTTON LED INOPERATIVE

Test Description

Does the system operate normally?

Connections

Go to Step 3

3

1. Leave the vehicle outside with

the ignition ON or set to
adaptive cruise control (ACC)
for 30 minutes.

2. Examine the navigation display

for the GPS icon, indicating
that the vehicle does not have
GPS reception.

Does the system have GPS
reception?

-

Go to Step 9 Go to Step 4

4

Inspect the front window glass for
tinting or any other alterations or
obstructions.
Is the front window glass OK?

-

Go to Step 6 Go to Step 5

5

Remove the front window glass
tinting or other alterations.
Did you complete the repair?

-

Go to Step 9

-

6

Test the GPS antenna line for
resistance between the center
conductor and the outer shield.
Does the resistance measure near the
specified value?

200 ohms

Go to Step 8 Go to Step 7

7

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

-

Go to Step 9 Go to Step 7

8

Replace the navigation radio. Refer
to Radio Replacement in
Entertainment.
Did you complete the replacement?

-

Go to Step 9

-

9

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

-

System OK

Go to Step 3

2007 Hummer H3

2007 ACCESSORIES AND EQUIPMENT Cellular, Entertainment and Navigation - H3

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

3: This step determines if the OnStar® status LED has the necessary green LED signal
circuit voltage.

5: If the green LED signal is shorted to voltage then the OnStar® 3-button assembly has
been damaged and the OnStar® 3-button assembly must be replaced.

OnStar Button LED Inoperative

Step

Action

Values

Yes

No

Schematic Reference: OnStar Schematics
Connector End View Reference: Entertainment/Communication Connector End
Views
DEFINITION: This procedure is for diagnosing problems with the OnStar® button
assembly LED.

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

engine OFF.

2. Observe the OnStar® status

LED.

Did the OnStar® status LED turn
GREEN?

-

Go to Testing
for
Intermittent
Conditions
and Poor
Connections
and Connector
Repairs

Go to Step 3

3

Measure the voltage from the keypad
green LED signal circuit to a good
ground.
Does the voltage measure near the
specified value?

7 V

Go to Step 6 Go to Step 4

4

Test the keypad green LED signal
circuit for an open, high resistance or
a short to ground. Refer to Circuit
Testing and Wiring Repairs .
Did you find and correct the
condition?

-

Go to Step 10 Go to Step 5

Test the keypad green LED signal

2007 Hummer H3

2007 ACCESSORIES AND EQUIPMENT Cellular, Entertainment and Navigation - H3

ONSTAR CALL CENTER REMOTE FUNCTION REQUESTS INOPERATIVE

Diagnostic Aids

5

circuit for a short to voltage. Refer
to Circuit Testing and Wiring
Repairs .
Did you find and correct the
condition?

-

Go to Step 7 Go to Step 8

6

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

-

Go to Step 10 Go to Step 7

7

Replace the OnStar® button
assembly. Refer to OnStar Button
Assembly Replacement.
Did you complete the repair?

-

Go to Step 10

-

8

Inspect for poor connections at the
harness connector of the vehicle
communication interface module
(VCIM). Refer to Testing for
Intermittent Conditions and Poor
Connections and Connector
Repairs .
Did you find and correct the
condition?

-

Go to Step 10 Go to Step 9

9

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

-

Go to Step 10

-

10

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

-

System OK

Go to Step 2

2007 Hummer H3

2007 ACCESSORIES AND EQUIPMENT Cellular, Entertainment and Navigation - H3

The customer concern may have been due to a lack of cellular service in a given area or a failure
in the National Cellular Network infrastructure that has since been corrected.

OnStar Call Center Remote Function Requests Inoperative

Step

Action

Yes

No

Schematic Reference: OnStar 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

Attempt to honk the horn, operate the
lights and lock or unlock the doors on the
vehicle.
Does the applicable system operate
properly?

Go to Step 3

Go to
Diagnostic
Starting
Point -
Horns

Go to
Diagnostic
Starting
Point -
Lighting
Systems

Go to
Diagnostic
Starting
Point -
Vehicle
Access

3

1. Contact the OnStar® Call Center by

pressing the blue OnStar® button.

2. Ask the OnStar® advisor to perform

a remote function (door lock/unlock,
light flash or horn honk).

IMPORTANT:

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

Go to

Use the scan tool to
access the STID
and ESN and
contact the General
Motors Technical

2007 Hummer H3

2007 ACCESSORIES AND EQUIPMENT Cellular, Entertainment and Navigation - H3