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Document ID# 1236781
2003 HUMMER
H2 </TD>
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<H1>Radio Automatic Volume Control Feature Inoperative (Rewire Noise
Cancellation Microphone) #03-08-44-004 - (02/04/2003)</H1>Radio Automatic Volume
Control Feature Inoperative (Rewire Noise Cancellation Microphone)
2003 HUMMER H2</P><A name=ss1-1236781><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1236781&psdid=293&evc=sm#ss1-1236781">
<H5>Condition</A></H5>
Some customers may comment that the Automatic Volume Control feature of the
radio is not working.</P><A name=ss2-1236781><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1236781&psdid=293&evc=sm#ss2-1236781">
<H5>Cause</A></H5>
The wires to the noise cancellation microphone may be installed in the
incorrect cavities at the audio amplifier module.</P><A name=ss3-1236781><A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1236781&psdid=293&evc=sm#ss3-1236781">
<H5>Correction</A></H5>
Install the noise cancellation microphone wires into the correct cavities at
the audio amplifier module using the following procedure:</P>
- <LI type=1>Remove the center console in order to gain access to the audio
amplifier module. Refer to the Console Replacement procedure in SI (Document
ID #834656).
<LI type=1>Disconnect connector 1 (Light Gray, 24 way) from the audio
amplifier.
<LI type=1>Locate the two wires (circuit 1354, Light Green/Black and circuit
1488, Dark Green) in the connector for the noise cancellation microphone. They
are in cavities B1 and B2 of the connector.
<LI type=1>Remove the two wires from the connector and reinstall them into the
opposite cavity from where they were originally. The Light Green/Black
(circuit 1354) wire should now be installed in cavity B1. The Dark Green
(circuit 1488) wire should now be installed in cavity B2.
<LI type=1>Reconnect connector 1 to the audio amplifier module.
<LI type=1>Install the center console. Refer to the Console Replacement
procedure in SI (Document ID #834656).
<LI type=1>Verify the operation of the noise cancellation microphone and the
Automatic Control Feature of the Entertainment System.
<LI type=1>If the Automatic Volume Control is still inoperative, refer to the
Diagnostic Starting Point-Entertainment (Document ID #684715) for further
diagnosis. </LI>
<A name=ss4-1236781><A
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<H5>Warranty Information</A></H5>
For vehicles repaired under warranty, use:</P>
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Labor Operation</P></TH>
<TH vAlign=bottom align=middle>
Description</P></TH>
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Labor Time</P></TH></TR>
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<TD vAlign=center align=middle>
N6632</P></TD>
<TD vAlign=center align=middle>
Wiring And/Or Connector-Repair Or Replace-Vehicle Entertainment</P></TD>
<TD vAlign=center align=middle>
ST</P></TD></TR></TBODY></TABLE>
</P>
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<TD align=left width=778><FONT size=1>GM bulletins are intended for use by
professional technicians, NOT a "do-it-yourselfer". They are written
to inform these technicians of conditions that may occur on some vehicles,
or to provide information that could assist in the proper service of a
vehicle. Properly trained technicians have the equipment, tools,
safety instructions, and know-how to do a job properly and safely.
If a condition is described, DO NOT assume that the bulletin applies to
your vehicle, or that your vehicle will have that condition. See
your GM dealer for information on whether your vehicle may benefit from
the information.
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<TD align=middle width=167><FONT size=2>WE SUPPORT VOLUNTARY TECHNICIAN
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© Copyright General Motors Corporation. All Rights
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2003 HUMMER
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