Not Connected or Communication Problems. Permanent Fault

Not connected or communication problems. Permanent fault

Checking for contact resistance and oxidation
Check that the eject function of the 10CD changer operates. If the eject function does not operate, check fuse #10 in the cargo compartment. Take readings between terminals #G1 and #G2. The voltage should be approximately 12 V.

Hint: If the car is equipped with road traffic information (RTI) connect the CD changer directly to the Melbus cable.

Check terminals #E1, #E2, #E3, #E4 and #E5 between the audio control module and the 10CD changer. Check for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Check for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Check for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check all the connectors on the Melbus cable. On a fully equipped car the units are placed in the following order: Audio control module-RTI-TV-10CD changer.
Check the 10CD changer and head unit / audio control module connectors for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check the cable between the 10CD changer terminal #D6 and head unit / audio control module terminal #D6 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Remedy as necessary.

Other information:
- CD player, replacing Service and Repair
- Radio/telephone, changing Service and Repair
- Connecting the breakout box, Audio control module Connecting the Breakout Box, Audio Control Module
- Signal specification, audio control module Signal Specification
If the 10CD changer is now OK, the fault was due to a bad connection in the connectors.





Is the 10CD changer OK?

Yes - Fault Found

No - Checking the wiring and component

-------------------------------------------------

Checking the wiring and component
Check the cable between 10CD changer terminals #1, #2, #3, #4 and #5 and head unit / audio module terminals #E1, #E2, #E3, #E4 and #E5 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Remedy as necessary.

Other information:
- CD player, replacing Service and Repair
- Radio/telephone, changing Service and Repair
- Connecting the breakout box, Audio control module Connecting the Breakout Box, Audio Control Module
- Signal specification, audio control module Signal Specification





Select "Continue" when the fault has been remedied.

Continue - Verification

-------------------------------------------------

Verification




Verification

Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off.
- Reinstall connectors, components etc.
- Ignition on.
Check that CD changer functions.

Does the CD changer function?

Yes - VERIFIED

No - VERIFICATION FAILED

------------------------

VERIFIED - Fault Found

VERIFICATION FAILED - Fault-tracing information

-------------------------------------------------

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

------------------------

FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking for contact resistance and oxidation

-------------------------------------------------