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Volvo
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2004
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S40 LSE
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Repair and Diagnosis
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Accessories & Equipment
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Infotainment
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Audio Equipment - Removal, Installation, & Inspection (644 Body)
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Entertainment Systems
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Signal specification, audio control module
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Connecting the breakout box and checking the ground terminal
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Definitions
Connecting the breakout box and checking the ground terminal: Definitions
DC voltage in volts (V)
U
low
= Voltage near 0 V
U
bat
= Battery voltage