V50 L5-2.4L VIN 39 B5244S7 (2005)
Continue - DONE
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Checking The Supply Voltage/Ground Terminal, Audio Module (AUD)
Checking the supply voltage/ground terminal
Checking the power supply and ground terminals
Power supply audio module (AUD)
The audio module (AUD) is powered via two power inputs on the control module.
When the ignition is on, both power inputs are powered and the audio module (AUD) is in active mode.
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Power input 1 (terminal #45 (#A1)) is supplied with power via a fuse from the battery. The audio module (AUD) will not be activated if there is an
open-circuit
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Power input 2 (terminal #6 (#B6)) is supplied with power via a relay on the central electronic module (CEM). The relay is powered via a fuse from
the battery. The relay coil can be diagnosed by the central electronic module (CEM). The audio module (AUD) will be activated when the power
input is supplied with power. The audio module (AUD) will not be activated if there is an open-circuit.
Checking the power supply
Check the power supply cable from the battery to the relay on the central electronic module (CEM) and from the relay for audio module (AUD) terminal
#6 (#B6). Check for an open-circuit. Check for loose connections. Check for contact resistance and oxidation. Check the fuse. The voltage must be
approximately battery voltage when the ignition is on.