XC90 AWD V8-4.4L VIN 85 B8444S (2005)
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.
Power input terminal #A1 is supplied with +30 from the battery via a fuse. It will not be possible to activate the antenna module (ATM) if there is an
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
for contact resistance and oxidation. Check the fuse. The voltage should be approximately battery voltage.
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
oxidation. With the ignition on, the drop in voltage between the mounting points for the control module and the body must not be greater than 0.5 V.
Remedy as necessary.
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.