The infra red (IR) sensors for this system are on the lower edge of each display screen and on the forward facing portion of the earpiece of each set of headphones. For optimum IR transmission, remove any obstacles between the headphones and the display screens. IR transmission can be degraded during conditions of direct sunlight inside the vehicle.

The display screens in this system are wired exactly the same. In the event that one display has questionable operation, the screens can be swapped in their position to test for a display component failure or a circuit failure.

Schematic Reference

Video System Schematics

Connector End View Reference

Entertainment/Communication Connector End Views

Electrical Information Reference

Important: Before performing this diagnostic select the proper channel by switching the channel selector located on the side of the headphones to A or B and verify the volume is turned up. The headphones used behind the driver seat must be switched to channel A. The headphones used behind the passenger seat must be switched to channel B.

1. Verify there are no obstructions that may block the infra-red port located below the video display screen.

⇒	If an obstruction exists, remove the obstruction.

2. Turn ON the wireless headphones. Verify the power indicator lamp on both wireless headphones illuminates.

⇒	If the power indicator lamp does not illuminate on one or more wireless headphones, check or replace the wireless headphone batteries. If the batteries are OK replace the suspect wireless headphone set.

3. Operate the DVD player in play mode. Set both wireless headphones to the proper channel. Adjust the volume up on both wireless headphones. Verify that both sets of wireless headphones operate properly.
4. Switch both sets of wireless headphones to the other channel. Swith the position of the wireless headphones behind the other headrest display.Verify that both sets of wireless headphones operate properly. If both sets of wireless headphones operate properly, review the system operation with the customer.

⇒	If only one set of wireless headphones do not have audio, on one side of the vehicle, replace the suspect wireless headphone set.

⇒	If both wireless headphones are inoperative on the same side of the vehicle, switch the positons of the head rest displays. If the fault follows the display position, replace the suspect display. containing the infra-red port.

⇒	If the fault does not follow the display, replace the A/V Box

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Refer to the accessory installation instructions for replacement.