XC90 L5-2.5L Turbo VIN 59 B5254T2 (2004)
Yes - Exit Fault-tracing
No - Attempt New Test
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Attempt New Test - Fault-tracing information
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Checking the Voltage/Ground Terminal, Audio Module (AUD)
Checking the voltage/ground terminal
Checking the power supply and ground terminals
Power supply audio module (AUD)
The power supply to the audio module (AUD) is via two power inputs on the control module.
When the ignition is on, both power inputs are powered and the audio module (AUD) is in active mode.
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Power input 1 (terminal #45 (#A1)) is supplied with power via a fuse from the battery. The audio module (AUD) will not be activated if there is an
open-circuit
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Power input 2 (terminal #6 (#B6)) 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 audio module (AUD) will be activated when the power
input is supplied with power. The audio module (AUD) 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 audio module (AUD)
terminal #6 (#B6). 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.
Check the power supply cable from the battery to audio module (AUD) terminal #45 (#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 audio module (AUD)
The audio module (AUD) has a ground input. The ground input from the control module is connected via a ground lead to the ground terminal in the car
body. See the relevant wiring diagram for further information about ground terminals.
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Ground input 1 (terminal #46 (#A2) is power ground and is connected to the ground terminal in the car body.
Checking ground terminal
Check the ground lead between audio module (AUD) terminal #46 (#A2) and the ground terminal. Check for an open-circuit. Check for loose
connections. Check for contact resistance and oxidation. With the ignition on, the drop in voltage between the ground connection for the audio module
(AUD) and the ground terminal must not be greater than 0.5 V.
Remedy as necessary.
Other information:
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Checking wiring and terminals See: Testing and Inspection/Component Tests and General Diagnostics/Checking Wiring and Terminals
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To connect the breakout box, see Connecting the breakout box See: Pinout Values and Diagnostic Parameters/Connecting the Breakout
Box/Connecting the Breakout Box, Audio Module (AUD)
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For information about signals, see Signal specification See: Pinout Values and Diagnostic Parameters/Signal Description/Signal Specification,
Audio Module (AUM)
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See the relevant wiring diagram for information about circuit and ground terminals in the bodywork.
