Inspection Procedure 7: The rear display unit sound is not output from the speaker.: Diagnosis
Required Special Tools:
- MB991223: Harness Set
- MB992006: Extra Fine Probe
- STEP 1. Check rear display unit connector D-06 and audio visual navigation unit connector C-07 or radio and CD player or CD changer connector C-14 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Is rear display unit connector D-06 and audio visual navigation unit connector C-07 or radio and CD player or CD changer connector C-14 in good condition?
YES: Go to Step 2.
NO: Repair or replace the damaged component(s). Refer to HARNESS CONNECTOR INSPECTION .
- STEP 2. Check the wiring harness between rear display unit connector D-06 (terminal 10, 11, 22) and audio visual navigation unit connector C-07 (terminal 64, 48, 49) or radio and CD player or CD changer connector C-14 (terminal 4, 13, 14). NOTE: Also check intermediate connectors C-15 < vehicles with MMCS > and D-123 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-15 < vehicles with MMCS > or D-123 is damaged, repair or replace the connector as described in HARNESS CONNECTOR INSPECTION .
- Check the communication lines for open circuit.
Q: Is the wiring harness between rear display unit connector D-06 (terminal 10, 11, 22) and audio visual navigation unit connector C-106 (terminal 64, 48, 49) or radio and CD player or CD changer connector C-14 (terminal 4, 13, 14) in good condition?
YES: Go to Step 3.
NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
- STEP 3. Retest the system
Check if the rear display unit sound is output from the speaker.
Q: Is the check result normal?
YES: The trouble can be an intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTIONS ).
NO: Replace the rear display unit.