Inspection Procedure 3: The rear display sound is not output from the speaker.


caution Whenever the rear display unit is replaced, ensure that the communication circuit is normal.

COMMENTS ON TROUBLE SYMPTOM


The wiring harness between the radio and CD player and the rear display unit, the radio and CD player, the rear display unit may have a problem.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE

STEP 1. Check of short to power supply, short to earth, and open circuit in VAL+, VAR+ line between rear display unit connector and radio and CD player connector terminal

Q. Is the check result normal?
Go to Step 2.
Repair the connector(s) or wiring harness.

STEP 2. Retest the system
Check if the rear display unit sound is output from the speaker.

Q. Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
Replace the rear display unit.