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 Open circuit, permanent faults . Check for a short-circuit to ground according to Short-circuit to ground, permanent faults . Check for a short-circuit to supply voltage according to Short-circuit to supply voltage, permanent faults .

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 Contact resistance and oxidation .

Check the cable between the 10CD changer terminal #D6 and head unit / audio control module terminal #D6 for an open-circuit according to Open circuit, permanent faults .

Remedy as necessary.

Other information:

If the 10CD changer is now OK, the fault was due to a bad connection in the connectors.

Fig 1: Breakout Box

Courtesy of VOLVO CARS OF NORTH AMERICA.

Is the 10CD changer OK?

YES
OKAY: Troubleshooting has been completed.
NO
Refer to Checking the wiring and component