Checking The Power Supply

Checking the power supply

Checking fuses and power supply




The remote digital audio receiver (RDAR) is suppled power from the central electronic module (CEM) via a fuse.
Check if fuse F64 for the Remote Digital Audio Receiver (RDAR) has blown by testing with a new fuse.

Hint: A blown fuse can give intermittent malfunctions.

- Run the starter motor (ignition position III) for a few seconds. Repeat this several times.
- Ignition on.
Check the supply voltage to the Remote Digital Audio Receiver (RDAR) by:
- Measure the voltage between control module connectors #C784-1 and #C784-2.
- Measuring the battery voltage.
If the difference between the control module's supply voltage and the battery voltage is greater than 2 V, the malfunction is in the supply cable.
If the difference is less than 2 V there may be an internal malfunction in the Remote digital audio receiver (RDAR).
- Remedy as necessary.

Other information
- For further information about the fuses and relays, see the Wiring Diagram
- Signal specification Pinout Values and Diagnostic Parameters
- Location of components Locations
- Checking wiring and terminals Checking Wiring And Terminals

Continue - Verification

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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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VERIFIED - FAULT FOUND

VERIFICATION FAILED - 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 - Exit fault-tracing

No - Attempt New Test

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Attempt New Test - Checking fuses and power supply

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