Volvo Workshop Manuals
XC90 AWD V8-4.4L VIN 85 B8444S (2005)
Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Antenna Control Module > Component Information > Testing and Inspection > Reading and Clearing Diagnostic Trouble Codes > Page 27
Antenna Control Module: Component Tests and General Diagnostics
Checking the power supply and ground terminals
Power supply, antenna module (ATM)
The antenna module (ATM) is powered via a power input on the control module.
Checking the power supply
Check the power supply cable from the battery to antenna module (ATM) terminal #A1. Check for an open-circuit. Check for loose connections. Check
Ground terminal, antenna module (ATM)
The antenna module (ATM) is connected to the chassis ground at fixed points in the body.
Checking ground terminal
Check that the casing on the antenna module (ATM) is properly connected to the body. Check for loose connections. Check for contact resistance and
Checking wiring and terminals See: Testing and Inspection/Component Tests and General Diagnostics/Checking Wiring and Terminals
For information about signals, see Signal specification See: Pinout Values and Diagnostic Parameters/Signal Specification, Antenna Module
See the relevant wiring diagram for information about circuit and ground terminals in the bodywork.
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