Checking Satellite Reception

Checking satellite reception

Checking Aerial module (ATM)




Certain frequencies on the radio can interfere with GPS-reception. In turn, this may lead to the navigation system indicating the wrong position or providing incorrect guidance. There are three radio frequencies that may lead to this interference. These are:
- FM 87.8 MHz.
- FM 94.3 MHz.
- FM 101.8 MHz.
To check if the problem is in the Aerial module (ATM), check as follows.

Hint: Perform the following check with a frequency, set on the radio, that is not close to the ones indicated above. Then use the check for comparison.

- Set the frequency to be investigated on the radio.
- Wait awhile so that the GPS-reception has an opportunity to stabilize.
- Check the number of satellites by clicking the symbol for VCT2000.
- If the number of satellites is less than the control case, then Aerial module (ATM) shall be replaced.
Perform the test for the three stated frequencies.

Other information
- Location of components Locations
- Receiver AM/FM (ATM), replacing Service and Repair









Was a fault detected?

Yes - Verification

No - Checking symptoms

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Checking symptoms
Check if the navigation system indicates wrong position, guides in an incorrect way, or if a similar symptom is found on any of the radio frequencies.
- FM 87.8 MHz.
- FM 94.3 MHz.
- FM 101.8 MHz.
If there is any symptom in the vehicle at these radio frequencies but not at others, the GPS-receiver shall be replaced.

Other information
- Location of components Locations
- Receiver GPS, TMC (ATM), replace Service and Repair









Was a fault detected?

Yes - Verification

No - Information

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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 symptom is gone at each radio frequency.

Is the symptom still present?

Yes - Information

No - FAULT FOUND

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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 - Checking Aerial module (ATM)

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