Hummer H2. Manual — part 269
Steering Wheel Controls - Terminal Identification - Upper Right (Radio-Seek/Volume)
DIAGNOSTIC INFORMATION AND PROCEDURES
DIAGNOSTIC STARTING POINT - ENTERTAINMENT
Begin the system diagnosis with the Diagnostic System Check - Entertainment System . The Entertainment
System 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 Entertainment System Diagnostic System Check will identify the correct procedure for
diagnosing the system and where the procedure is located.
4
-
-
Not Used
5
L-GN
1011
Remote Radio Control Signal
Connector Part Information
z
50579406
z
6-Way F Molex (BK)
Pin
Wire Color
Circuit No.
Function
1
WH
2283
12-Volt Reference
2
L-GN
1011
Remote Radio Control Signal
3
BN
230
Steering Wheel Switch Dimming Control
4
-
-
Not Used
5
BK
1851
Ground
6
L-GN
1011
Remote Radio Control Signal
2004 Hummer H2
2004 ACCESSORIES & EQUIPMENT Entertainment - Hummer H2
DIAGNOSTIC SYSTEM CHECK - ENTERTAINMENT SYSTEM
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 of the class 2 serial data circuit or due to a
total malfunction of the class 2 serial data circuit. The specified procedure will determine the particular
condition.First design uses a class 2 amplifier, 2nd design uses a non-class 2 amplifier.
5: The presence of DTCs which begin with "U" indicate some other module is not communicating. The
specified procedure will compile all the available information before tests are performed.
Diagnostic System Check - Entertainment System
Step
Action
Yes
No
1
1. Install a scan tool.
2. Turn ON the ignition, with the
engine OFF.
Does the scan tool power up?
Go to Step 2
Go to Scan Tool Does Not
Power Up in Data Link
Communications
2
Attempt to establish communication
with the following:
z
Radio
z
Amplifier (1st design only),
refer to Radio/Audio System
Description and Operation
for explanation of designs.
z
Body control module (BCM)
z
Auxiliary HVAC control
module
z
Digital Radio Receiver (DRR)
Does the scan tool communicate with
the radio, amplifier, BCM, auxiliary
HVAC control module, and DRR?
Go to Step 3
Go to Scan Tool Does Not
Communicate with Class 2
Device in Data Link
Communications
1. Access the Class 2 Power
Mode in the Diagnostic Circuit
IMPORTANT:
The engine may start during the
following step. Turn OFF the
engine as soon as you have
observed the Crank power mode.
2004 Hummer H2
2004 ACCESSORIES & EQUIPMENT Entertainment - Hummer H2
SCAN TOOL DATA LIST
Audio Amplifier
3
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?
Go to Step 4
Go to Power Mode
Mismatch in Body Control
System
4
Select the following display DTCs
function on the scan tool:
z
Radio
z
Amplifier (1st design only)
z
Body control module (BCM)
z
Auxiliary HVAC control
module
z
Digital Radio Receiver (DRR)
Does the scan tool display any
DTCs?
Go to Step 5
Go to Symptoms -
Entertainment
5
Does the scan tool display any DTCs
which begin with a "U"?
Go to Scan Tool Does Not
Communicate with Class 2
Device in Data Link
Communications
Go to Step 6
6
Does the scan tool display DTC
B1000?
Go to Diagnostic Trouble
Code (DTC) List in Body
Control System
Go to Step 7
7
Does the scan tool display DTC
B1327?
Go to Diagnostic Trouble
Code (DTC) List in Engine
Electrical
Go to Diagnostic Trouble
Code (DTC) List
Scan Tool Parameter
Data
List
Units Displayed
Typical Data
Value
Operating Conditions: Ignition in RUN, Radio ON
Audio Device
Data
Null/Tuner/CD Player
Varies
Balance
Data
Value
-50 to +50
Bass
Data
Percent
0-100%
Battery Voltage
Data
Volts
0-18V
Front Left, Front Right, LF Woofer, Back Left, Back
2004 Hummer H2
2004 ACCESSORIES & EQUIPMENT Entertainment - Hummer H2
Radio
Rear Seat Audio (RSA) Controller
SCAN TOOL DATA DEFINITIONS
8-Digit GM Part Number
Chime Speaker
Data
Right, RF Woofer
Varies
Chime Volume
Data
Percent
0-100%
External Audio Device
Data
Connected/Not Connected
Varies
Fade
Data
Value
-50 to +50
Ignition Since Current
DTC
Data
Cycles
0-225
Microphone Level
Data
Percent
0-100%
Noise Compensation
Data
On/Off
Varies
Treble
Data
Percent
0-100%
Volume
Data
Percent
0-100%
Scan Tool Parameter
Data List
Units Displayed
Typical Data Value
Operating Conditions: Ignition in RUN, Radio ON
8-Digit GM Part Number
ID Information
Numeric
Varies
Balance
Data
Value
-50 to +50
Bass
Data
Percent
0-100%
Battery Voltage
Data
Volts
0-18V
Cal. Module 1 Part No.
ID Information
Numeric
Varies
Cal. Module 1 Suffix
ID Information
Varies
Varies
Fade
Data
Value
-50 to +50
Ignition Since Current DTC
Data
Cycles
0-225
Midrange
Data
Percent
0-100%
Operational S/W Part No.
ID Information
Numeric
Varies
Operational S/W Suffix
ID Information
Varies
Varies
Signal Strength
Data
dB
0-225
Treble
Data
Percent
0-100%
Volume
Data
Percent
0-100%
Scan Tool Parameter
Data List
Units Displayed
Typical Data Value
Operating Conditions: Ignition in RUN, Radio ON
Battery Voltage
Data
Volts
0-18V
CD Changer Disc Number
Data
Varies
1
CD Changer Track Number
Data
Varies
1
Ignition Since Current DTC
Data
Cycles
0-225
Single CD Disc Number
Data
Varies
1
2004 Hummer H2
2004 ACCESSORIES & EQUIPMENT Entertainment - Hummer H2
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