Checking Radio Reception, Digital Radio
Checking radio reception, digital radio
Fault-tracing information
Symptom troubleshooting for the digital radio is structured according to the following list. It is possible to cancel troubleshooting at each step if the problem is found.
1. Identifying probable causes.
2. Reading off diagnostic trouble codes (DTCs).
3. Checking wiring and components.
4. Checking antenna cable
5. Checking the control module.
6. Checking the antenna.
The function of the remote digital audio receiver (RDAR) is to receive digital radio signals from satellites and terrestrial transmitters.
The remote digital audio receiver (RDAR) must be within the coverage area of the satellites and transmitters in order to work optimally. For more information about radio reception limitations, see Design and Function for Remote digital audio receiver (RDAR).
Continue - Fault identification
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Checking the wiring and connectors
Check that Diagnostic trouble codes (DTCs) have been stored for the Remote Digital Audio Receiver (RDAR) and follow the instructions that each DTC refers to.
If no DTCs are stored for the Remote Digital Audio Receiver (RDAR), continue fault tracing as follows:
1. Check fuses.
2. Check the cable harness and connectors.
Has the fault been remedied?
Yes - FAULT FOUND
No - Checking the antenna.
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Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off
- Reinstall the connectors, components etc.
- Ignition on.
Check that the radio is working and that the reception is acceptable.
Is the radio playing through the loudspeakers?
Yes - VERIFIED
No - VERIFICATION FAILED
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VERIFICATION FAILED - Fault-tracing information
VERIFIED - FAULT FOUND
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Fault-tracing information
Information
Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.
Do you want to exit fault-tracing?
Yes - Exit fault-tracing
No - Attempt New Test
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Attempt New Test - Fault-tracing information
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Checking antenna cable
Perform a visual check of the antenna and ensure that it is intact and not damaged. Poor radio reception may be because the antenna connectors are not correctly connected. If all radio reception is unavailable then it may be the case that the antenna cable is not connected correctly.
Remedy as necessary.
Note! Antenna replacement should only be as a last resort.
Has the fault been remedied?
Yes - FAULT FOUND
No - Checking the Remote Digital Audio Receiver (RDAR)
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Checking the Remote Digital Audio Receiver (RDAR)
1. Update the software in the event of sound problems.
2. If the problem remains after new software has been downloaded, see special mechanical instruction. Replace the Remote Digital Audio Receiver (RDAR). Download new software to the Remote Digital Audio Receiver (RDAR).
3. Read off diagnostic trouble codes (DTCs).
4. Erase diagnostic trouble codes (DTCs).
Has the fault been remedied?
Yes - Verification
No - Checking the antenna.
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Fault identification
Causes of interference can be:
External causes
- Tall buildings or mountains.
- Branches and leaves on trees.
- Bridges.
- Tunnels.
- Electrical wiring.
- The vehicle is indoors, such as in a garage for example.
- The vehicle is outside the transmitting station's coverage area for digital radio reception.
- Weather conditions.
Internal causes
- Loose connections.
- Internal fault in the Remote Digital Audio Receiver (RDAR).
- Internal fault in the antenna.
Before taking action, ensure the following:
- Does the sound disappear on a daily basis?
- Does the sound disappear at the same location and at the same time of day?
- How does the area look where the sound disappears? Tall buildings, tall mountains, trees with branches and leaves etc?
- Is there a warning message in the Infotainment Control Module (ICM)?
If the audio loss is due to external causes in accordance with the list above then no action should be taken. Instead inform the customer that it is normal that the sound will disappear under certain circumstances.
Do you want to exit fault-tracing?
Yes - FAULT FOUND
No - Checking the wiring and connectors
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Checking the antenna.
Rectify in the following order:
Connect an antenna from the XC90 accessory kit to the remote digital audio receiver (RDAR).
Check the function of the radio.
Note! The verification must be made outdoors.
Is the radio playing through the loudspeakers?
Yes - Checking antenna cable
No - Checking the Remote Digital Audio Receiver (RDAR)
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Checking the antenna.
Replace the antenna.
Continue - Verification
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