Diagnostic Procedure

Confirm that the disk complies with the market specifications.

Q: Is the check result normal? 

1. YES  : Go to Step 2.
2. NO  : Use a disk, which complies with the market specifications.

Confirm that the disk is inserted with its correct side facing up.

Q: Is the check result normal? 

1. YES  : Go to Step 3.
2. NO  : Confirm the disc face, and insert it again. (If the disc is single-sided, its label should face up)

Confirm that the disk is not contaminated or scratched.

Q: Is the check result normal? 

1. YES  : Go to Step 4.
2. NO  : Clean the disk or use a clean disk.

Confirm that sound data is included in the disk.

Q: Is the check result normal? 

1. YES  : Go to Step 5.
2. NO  : Use a disk, which contains sound data.

Check whether the DIN cable between the M-bus adapter and the radio/CD player is connected correctly.

Q: Is the check result normal? 

1. YES  : Go to Step 6.
2. NO  : Replace the DIN cable.

Confirm that sound data is included in the disk.

Q: Is the check result normal? 

1. YES  : Go to Step 7.
2. NO  : Confirm by playing a disk, which contains sound data.

Check the disk is being played in a normal mode without using special functions such as rewinding, fast-forwarding, slow motion or pause.

Q: Is the check result normal? 

1. YES  : Go to Step 8.
2. NO  : Check by playing the disk in a normal mode.

Confirm what type of sound does not come out from the speakers.

Q: What type of sound does not come out? 

1. All types come out.  : The trouble can be an intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
2. No sound comes out.  : Go to Step 9.
3. The radio/CD player does not sound.  : Go to  Step 10.

Confirm that all the speakers sound when the rear display unit assembly (overhead type) is substituted.

Q: Is the check result normal? 

1. YES  : If the system is operated via the main panel, replace the rear display unit assembly (overhead type). If the system is operated via the remote control, refer to INSPECTION PROCEDURE 4: The Remote Control does not Function.  .
2. NO  : Check the wiring harnesses and the DIN cable between each speakers and the rear display unit assembly (overhead type), and repair or replace if necessary. Then go to  Step 11.

Confirm that all the speakers sound when the M-bus adapter is substituted.

Q: Is the check result normal? 

1. YES  : Replace the M-bus adapter.
2. NO  : Check the wiring harnesses and the DIN cable between each speakers and the M-bus adapter, and repair or replace if necessary. Then go to step 11.

Confirm that the radio/CD player sound comes out from all the speakers.

Q: Is the check result normal? 

1. YES  : Go to Step 12.
2. NO  : Diagnose the radio/CD player. Refer to AUDIO SYSTEM DIAGNOSTIC TROUBLESHOOTING STRATEGY  .

Confirm that radio/CD player sound comes out from all the speakers when the rear display unit assembly (overhead type) is substituted.

Q: Is the check result normal? 

1. YES  : If the system is operated via the main panel, replace the rear display unit assembly (overhead type). If the system is operated via the remote control, Refer to INSPECTION PROCEDURE 4: The Remote Control does not Function.  .
2. NO  : Go to Step 13.

Confirm that radio/CD player sound comes out from all the speakers when the radio/CD player is substituted.

Q: Is the check result normal? 

1. YES  : Replace the radio/CD player.
2. NO  : Go to  Step 8.