Auto Volume

Klaus · #13 04-02-2004, 12:12 AM

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<TD align=middle width="50%">Document ID# 1369904
2003 HUMMER
H2 </TD>
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<H1>Noise Compensated Volume Inoperative</H1>
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Step</P></TH>
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Action</P></TH>
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Value</P></TH>
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Yes</P></TH>
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No</P></TH></TR>
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Schematic Reference: <A
href="http://127.0.0.1:9001/servlets/CellHandler?CellId=46762&RefDoc=1369904">Radio/Audio
System Schematics</A> </P></TD></TR>
<TR>
<TD vAlign=center align=middle><A name=S01>

1</P></A></TD>
<TD vAlign=top align=left>

Did you perform the Diagnostic System Check - Entertainment
System?</P></TD>
<TD vAlign=center align=middle>

--</P></TD>
<TD vAlign=bottom align=middle>

Go to <A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1369904&psdid=293&evc=sm#S02"> Step
2</A> </P></TD>
<TD vAlign=bottom align=middle>

Go to <A
href="http://127.0.0.1:9001/servlets/CellHandler?CellId=66419&RefDoc=1369904">Diagnosti c
System Check - Entertainment System</A> </P></TD></TR>
<TR>
<TD vAlign=center align=middle><A name=S02>

2</P></A></TD>
<TD vAlign=top align=left>

<LI type=1>Turn ON the ignition, with the engine ON.
<LI type=1>Turn ON the blower motor on the maximum speed.
<LI type=1>Cycle the auto volume control ON and then OFF. </LI>

Is a difference in volume heard?</P></TD>
<TD vAlign=center align=middle>

--</P></TD>
<TD vAlign=bottom align=middle>

Go to <A
href="http://127.0.0.1:9001/servlets/CellHandler?CellId=62112&RefDoc=1369904">Testing
for Intermittent and Poor Connections</A> in Wiring Systems</P></TD>
<TD vAlign=bottom align=middle>

Go to <A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1369904&psdid=293&evc=sm#S03"> Step
3</A> </P></TD></TR>
<TR>
<TD vAlign=center align=middle><A name=S03>

3</P></A></TD>
<TD vAlign=top align=left>

<LI type=1>Turn ON the ignition, with the engine OFF.
<LI type=1>Disconnect the noise compensation microphone.
<LI type=1>Measure the voltage from the noise compensation microphone
supply voltage circuit to the drain wire. </LI>

Does the voltage measure near the specified value?</P></TD>
<TD vAlign=center align=middle>

8V</P></TD>
<TD vAlign=bottom align=middle>

Go to <A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1369904&psdid=293&evc=sm#S04"> Step
4</A> </P></TD>
<TD vAlign=bottom align=middle>

Go to <A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1369904&psdid=293&evc=sm#S05"> Step
5</A> </P></TD></TR>
<TR>
<TD vAlign=center align=middle><A name=S04>

4</P></A></TD>
<TD vAlign=top align=left>

Replace the noise compensation microphone. Refer to <A
href="http://127.0.0.1:9001/servlets/CellHandler?CellId=47020&RefDoc=1369904">Microphon e
Replacement - Radio Volume Compensator Interior</A> .</P>

Did you complete the replacement?</P></TD>
<TD vAlign=center align=middle>

--</P></TD>
<TD vAlign=bottom align=middle>

Go to <A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1369904&psdid=293&evc=sm#S09"> Step
9</A> </P></TD>
<TD vAlign=center align=middle>

--</P></TD></TR>
<TR>
<TD vAlign=center align=middle><A name=S05>

5</P></A></TD>
<TD>

Test the noise compensation microphone supply voltage circuit for an
open or short. Refer to <A
href="http://127.0.0.1:9001/servlets/CellHandler?CellId=62194&RefDoc=1369904">Circuit
Testing</A> and <A
href="http://127.0.0.1:9001/servlets/CellHandler?CellId=61965&RefDoc=1369904">Wiring
Repairs</A> in Wiring Systems.</P>

Did you find and correct the condition?</P></TD>
<TD vAlign=center align=middle>

--</P></TD>
<TD vAlign=bottom align=middle>

Go to <A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1369904&psdid=293&evc=sm#S09"> Step
9</A> </P></TD>
<TD vAlign=bottom align=middle>

Go to <A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1369904&psdid=293&evc=sm#S06"> Step
6</A> </P></TD></TR>
<TR>
<TD vAlign=center align=middle><A name=S06>

6</P></A></TD>
<TD>

Test the drain wire circuit for an open or short. Refer to <A
href="http://127.0.0.1:9001/servlets/CellHandler?CellId=62194&RefDoc=1369904">Circuit
Testing</A> and <A
href="http://127.0.0.1:9001/servlets/CellHandler?CellId=61965&RefDoc=1369904">Wiring
Repairs</A> in Wiring Systems.</P>

Did you find and correct the condition?</P></TD>
<TD vAlign=center align=middle>

--</P></TD>
<TD vAlign=bottom align=middle>

Go to <A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1369904&psdid=293&evc=sm#S09"> Step
9</A> </P></TD>
<TD vAlign=bottom align=middle>

Go to <A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1369904&psdid=293&evc=sm#S07"> Step
7</A> </P></TD></TR>
<TR>
<TD vAlign=center align=middle><A name=S07>

7</P></A></TD>
<TD>

Inspect for poor connections at the amplifier. Refer to <A
href="http://127.0.0.1:9001/servlets/CellHandler?CellId=62112&RefDoc=1369904">Testing
for Intermittent and Poor Connections</A> and <A
href="http://127.0.0.1:9001/servlets/CellHandler?CellId=61973&RefDoc=1369904">Connector
Repairs</A> in Wiring Systems.</P>

Did you find and correct the condition?</P></TD>
<TD vAlign=center align=middle>

--</P></TD>
<TD vAlign=bottom align=middle>

Go to <A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1369904&psdid=293&evc=sm#S09"> Step
9</A> </P></TD>
<TD vAlign=bottom align=middle>

Go to <A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1369904&psdid=293&evc=sm#S08"> Step
8</A> </P></TD></TR>
<TR>
<TD vAlign=center align=middle><A name=S08>

8</P></A></TD>
<TD>

Replace the amplifier. Refer to <A
href="http://127.0.0.1:9001/servlets/CellHandler?CellId=46705&RefDoc=1369904">Amplifier
Replacement</A> .</P>

Did you complete the repair?</P></TD>
<TD vAlign=center align=middle>

--</P></TD>
<TD vAlign=bottom align=middle>

Go to <A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1369904&psdid=293&evc=sm#S09"> Step
9</A> </P></TD>
<TD vAlign=center align=middle>

--</P></TD></TR>
<TR>
<TD vAlign=center align=middle><A name=S09>

9</P></A></TD>
<TD vAlign=top align=left>

Operate the system in order to verify the repair.</P>

Did you correct the condition?</P></TD>
<TD vAlign=center align=middle>

--</P></TD>
<TD vAlign=bottom align=middle>

System OK</P></TD>
<TD vAlign=bottom align=middle>

Go to <A
href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=1369904&psdid=293&evc=sm#S03"> Step
3</A> </P></TD></TR></TBODY></TABLE>
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<TR>
<TD width="25%" slign="LEFT"></TD>
<TD align=middle width="50%">Document ID# 1369904
2003 HUMMER
H2 </TD>
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