XC90 AWD L6-2.9L Turbo VIN 91 B6294T (2004)
Continue - DONE
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Checking the Supply/Ground Terminal, Multimedia Module (MMM)
Checking the voltage/ground terminal
Checking the power supply and ground terminals
Power supply multimedia module (MMM)
The multimedia module (MMM) is supplied with power via a power supply input on the control module.
When the ignition is on, the power input is powered and the multimedia module (MMM) is in active mode.
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Power input 1 (terminal #21 (#A1)) 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 multimedia module (MMM) 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 the multimedia module
(MMM) terminal #21 (#A1). 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.
Ground terminal multimedia module (MMM)
