Volvo Workshop Manuals
XC90 FWD L6-3.2L VIN 98 B6324S (2007)
Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Communications Control Module > Component Information > Testing and Inspection > Reading and Clearing Diagnostic Trouble Codes > Page 191
Communications Control Module: Component Tests and General Diagnostics
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.
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
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
Ground terminal multimedia module (MMM)
The multimedia module (MMM) has a ground input. The ground input from the control module is connected via a ground lead to the ground terminal in
Ground input 1 (terminal #25 (#A5) is power ground and is connected to the ground terminal in the car body.
Checking ground terminal
Check the ground lead between multimedia module (MMM) terminal #25 (#A5) and the ground terminal. Check for an open-circuit. Check for loose
Checking wiring and terminals See: Testing and Inspection/Component Tests and General Diagnostics/Checking Wiring and Terminals
To connect the breakout box, see Connecting the breakout box See: Pinout Values and Diagnostic Parameters/Connecting the Breakout
For information about signals, see Signal specification See: Pinout Values and Diagnostic Parameters/Signal Description/Signal Description,
See the relevant wiring diagram for information about circuit and ground terminals in the bodywork.
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