• Improper audio unit installation. (e.g., rattle, loose)
• Inadequate tire pressure.
Note
• The CD may be malfunctioning if the CD player/changer does not eject the certain CD only. Inspect the CD player/changer operation using the CD known to be good.
Diagnostic procedure
STEP
INSPECTION
ACTION
1
• Does the sound jump when the vehicle is stopped?
Yes
Go to the Step 6.
No
Go to the next step.
2
• Drive the vehicle.
• Does the sound jump when driving over uneven surfaces?
Yes
Go to the next step.
No
Go to the Step 6.
3
• Is the audio unit installed securely?
Yes
Go to the next step.
No
Install the audio unit securely.
4
• Inspect the tire pressure.
• Is the tire pressure normal?
Yes
Replace the audio unit.
No
Go to the next step.
5
• Adjust the tire pressure within specification.
• Does the sound jump when driving the vehicle?
Yes
Replace the audio unit.
No
Audio system is normal. Explain repairs to the customers.
6
• Replace the CD known to be good.
• Does the sound jump when driving the vehicle?
Yes
Replace the audio unit.
No
Audio system is normal. Explain to the customer that the CD is malfunctioning.