V50 L5-2.4L VIN 39 B5244S7 (2005)
The Integrated Audio Module (IAM) has a ground input. The ground input from the control module is connected via a ground cable to the ground
terminal in the body. For further information on ground terminals, see the relevant wiring diagram.
Ground input 1 (#A14) is power ground and connected to the ground terminal in the body.
Checking the ground terminal
Check the ground cable between the Integrated Audio Module (IAM) (#A14) and the ground terminal with regard to open circuits, loose connections,
contact resistance and corrosion. With the ignition on the voltage drop between the Integrated Audio Module (IAM) ground terminal and the chassis
connection must not be greater than 0.5 V.
Remedy as necessary.
Signal description, Integrated Audio Module (IAM) See: Pinout Values and Diagnostic Parameters/Signal Description, Integrated Audio Module
See the relevant wiring diagram for information about circuits and ground terminals in the bodywork.
Checking wiring and terminals See: Testing and Inspection/Component Tests and General Diagnostics/Checking Wiring and Terminals
Continue - DONE
Checking the Supply Voltage/Ground Terminal, Multimedia Module (MMM)
Checking the supply voltage/ground terminal
Checking the power supply and ground terminals
Power supply multimedia module (MMM)
The multimedia module (MMM) is powered via a power input on the control module.
When the ignition is on, the power input is powered and the multimedia module (MMM) is in active mode.
Power input 1 (terminal #21 (#A1)) is powered via a fuse from the central electronic module (CEM). The multimedia module (MMM) will not be
activated if there is an open-circuit.
Checking the power supply