Checking Radio Reception

Checking radio reception

Fault-tracing information
Troubleshooting analyses have shown that poor AM/FM-reception may be due to several causes. To perform correct action, troubleshoot first according to the following:
1. Inform the customer that it is normal for the radio signal to have interference from e.g.:
- Electrical wiring.
- Bridges.
- Tunnels.
- The vehicle is indoors, such as in a garage for example.
- The vehicle is in the broadcasting station's outer coverage area.
1. Other causes that may interfere with the radio signal are as follows:
- The customer has connected external devices such as chargers, electric coolers, etc., in the 12-volt socket.
- Sun visor film with metal has been fitted on windows with antenna pattern.
- The heating coil in the rear window is damaged.
1. Check that Diagnostic trouble codes (DTCs) have been stored for the integrated audio module (IAM) and follow the instructions that each DTC refers to.
2. Check the cable harness and connectors. Poor radio reception may be because the antenna connectors are not connected to the window antennas. If there is no radio reception, this may be because the antenna cable is not connected to the antenna amplifier.
3. Using a torque wrench check that the screw in the antenna amplifier is tightened to the ground terminal to a torque of 10 Nm.
4. Perform a visual check of the aerials and ensure that they are intact and not damaged.
Replace damaged components.
If no malfunction is found:
- Replace antenna amplifier. Check the function.
- If the problem remains, replace the integrated audio module (IAM).
Fault symptom
- Radio/Does not work
- Radio/Interference/AM frequency
- Radio/Interference/FM frequency
- Radio/Poor reception/AM frequency
- Radio/Poor reception/FM frequency

Note! Download new software in the new control module after replacement.





Continue - DONE

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