Checking the Antenna Amplifier

Checking the antenna amplifier

Checking the component

Note! Check that there is no tinted film containing metal oxides installed on the rear windshield. This can affect TV reception.




- Ignition on
- Select TV on the audio unit.
Disconnect both the connectors on the TV receiver which go to the antenna amplifier.
Then connect tool 951 2857 2-pin adapter 951 2857 2-Pin Adapter to one connector at a time. The switch in the tool should be in the OFF position. Measure the current. The current should be between 20 and 60 mA. Try a new antenna amplifier if the value is outside the listed range.
Check that the antenna amplifier connector is connected to the antenna in the rear windshield.
When replacing the antenna amplifier for the TV check that "TV" is shown on the replacement unit.

Hint: If the antenna amplifier draws more than 100 mA, the current is "shut off" in the TV control module and drops to 0 mA.

Remedy as necessary.

Other information:
- To access and replace the antenna amplifier, see Replacing the antenna amplifier Replacing the Antenna Amplifier
- To access and replace the TV receiver, see Replacing the TV receiver Replacing the TV Receiver.





Was a fault detected?

Yes - verifnode

No - Checking the cable

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Checking the cable




- Ignition off.
Check the cable terminals on the connectors on the antenna amplifier. The cable terminals must not be damaged, pressed back or oxidized.
Check the cable between the TV receiver and the antenna amplifier. Check for a short-circuit to supply voltage. Check for a short-circuit to ground. Check for an open-circuit.

Other information:
- To fault-trace wiring and terminals, see Checking wiring and terminals Checking Wiring And Terminals.





Was a fault detected?

Yes - Verification

No - No Fault Found

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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
- Select TV on the audio unit.
Check that the TV reception is OK.

Is the TV reception OK?

Yes - Fault Found

No - Fault-tracing information

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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 - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking the component

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