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Circuit/System Testing

One Screen Inoperative

  1. Ignition OFF.
  2. Disconnect the X1 harness connector at the inoperative P22 Video Display.
  3. Test for less than 10 Ω between the ground circuit terminal 3 and ground.
    • If 10 Ω or greater. 
    1. Test for less than 2 Ω in the ground circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, repair the open/high resistance in the ground connection.
    • Go to next step: If less than 10 Ω. 
  4. Verify that a test lamp illuminates between the B+ circuit terminal 1 and ground.
    • If the test lamp does not illuminate. 

      Repair the open/high resistance in the circuit

    • Go to next step: If the test lamp illuminates. 
  5. Ignition On/Vehicle in Service Mode. Rear seat entertainment system ON.
  6. Test for 5 V or greater between the control circuit terminal 2 and ground.
    • If less than 5 V. 
    1. Ignition OFF, disconnect the X1 harness connector at the A33 Media Disc Player.
    2. Test for infinite resistance between the control circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • Go to next step: If infinite resistance
    3. Test for less than 2 Ω in the control circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the A33 Media Disc Player.
    • Go to next step: If 5 V or greater. 
  7. Ignition OFF.
  8. Verify the LVDS cable is properly connected at the P22 Video Display, A33 Media Disc Player and all in-line connectors, and there is no damage to the cable or connections.
    • If connection problems or cable damage is noted. 

      Perform the appropriate repair or replacement to correct any issues.

    • Go to next step: If no connection problems or cable damage is noted. 
  9. Connect the X1 harness connector at the P22 Video Display.
    10. NOTE:

    In the following steps, the test tools are used to create a jumper for the LVDS cable from the operating display to the inoperative display.

  10. Disconnect the X2 harness connector at the operating P22 Video Display.
  11. Connect the EL-50334-4 Type A female to Mini B female Adapter to the harness of the operating P22 Video Display. Connect the EL-50334-14 Infotainment Test Cable to the adapter.
  12. Disconnect the X2 harness connector at the inoperative P22 Video Display. Connect the EL-50334-14 Infotainment Test Cable to the inoperative P22 Video Display.
  13. Ignition On/Vehicle in Service Mode. Rear seat entertainment system ON.
  14. Verify the P22 Video Display turns on.
    • If the P22 Video Display does not turn on. 

      Replace the P22 Video Display.

    • Go to next step: If the P22 Video Display turns on. 
  15. Disconnect the test cable and adapter from the harness of the operating P22 Video Display. Connect all harness connectors at operating P22 Video Display.
  16. Disconnect the X4 harness connector at the A33 Media Disc Player.
    17. NOTE:

    In the following steps, the test tools are assembled and used to bypass the vehicle LVDS cable assembly to determine if there is an output from the A33 Media Disc player on LVDS.

  17. Connect the EL-50334-12 Infotainment Test Cable - RSE to the A33 Media Disc Player. Connect the EL-50334-13 Infotainment Test Cable - RSE Splitter to the EL-50334-12 Infotainment Test Cable - RSE. Connect the EL-50334-14 Infotainment Test Cable and the EL-50334-2 Type A female to Mini B male USB Cable together. Connect the assembled test cables to the longer end of the EL-50334-13 Infotainment Test Cable - RSE Splitter and the inoperative P22 Video Display.
  18. Ignition On/Vehicle in Service Mode. Rear seat entertainment system ON.
  19. Verify the P22 Video Display does NOT turn ON.
    • If the P22 Video Display turns on. 

      Replace the appropriate LVDS cable.

    • Go to next step: If the P22 Video Display does not turn on. 
  20. Test or replace the A33 Media Disc Player.

Both Screens Inoperative

  1. Ignition OFF.
  2. Disconnect the X1 harness connector at each of the P22 Video Displays.
  3. Test for less than 10 Ω between each ground circuit terminal 3 and ground.
    • If 10 Ω or greater. 
    1. Test for less than 2 Ω in the ground circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, repair the open/high resistance in the ground connection.
    • Go to next step: If less than 10 Ω. 
  4. Verify that a test lamp illuminates between each B+ circuit terminal 1 and ground.
    • If the test lamp does not illuminate and the circuit fuse is good. 
    1. Ignition OFF, remove the test lamp.
    2. Test for less 2 Ω in the B+ circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse.
    • If the test lamp does not illuminate and the circuit fuse is open. 
    1. Ignition OFF, remove the test lamp.
    2. Test for infinite resistance between the B+ circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • Go to next step: If infinite resistance.
    3. Replace the fuse.
    4. Connect the harness connectors at the P22F Video Display.
    5. Ignition ON, rear seat entertainment system ON.
    6. Verify the fuse does not open.
      • If the fuse opens, replace the P22F Video Display.
      • If the fuse does not open, replace the P22E Video Display.
    • Go to next step: If the test lamp illuminates. 
  5. Test for 5 V or greater between the control circuit terminal 2 and ground at each display.
    • If less than 5 V. 
    1. Ignition OFF, disconnect the X1 harness connector at the A33 Media Disc Player.
    2. Test for infinite resistance between the control circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • Go to next step: If infinite resistance
    3. Test for less than 2 Ω in the control circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the A33 Media Disc Player.
    • Go to next step: If 5 V or greater. 
  6. Ignition OFF.
  7. Connect the X1 harness connectors at both of the P22 Video Displays.
  8. Verify the LVDS cable is properly connected at the P22E Video Display, P22F Video Display, A33 Media Disc Player and all in-line connectors, and there is no damage to the cable or connections.
    • If connection problems or cable damage is noted. 

      Perform the appropriate repair or replacement to correct any issues.

    • Go to next step: If no connection problems or cable damage is noted. 
  9. Disconnect the X4 harness connector at the A33 Media Disc Player and the X2 harness connector at the P22E Video Display.
    10. NOTE:

    In the following steps, the test tools are assembled and used to bypass the vehicle LVDS cable assembly to determine if there is an output from the A33 Media Disc player on LVDS.

  10. Connect the EL-50334-12 Infotainment Test Cable - RSE to the A33 Media Disc Player. Connect the EL-50334-13 Infotainment Test Cable - RSE Splitter to the EL-50334-12 Infotainment Test Cable - RSE. Connect the EL-50334-14 Infotainment Test Cable and the EL-50334-2 Type A female to Mini B male USB Cable together. Connect the assembled test cables to the longer end of the EL-50334-13 Infotainment Test Cable - RSE Splitter and the P22E Video Display.
  11. Ignition ON, rear seat entertainment system ON.
  12. Verify the P22E Video Display turns on with the system.
    • If the P22E Video Display does not turn on. 

      Replace the A33 Media Disc Player.

    • Go to next step: If the P22E Video Display turns on. 
  13. Replace the appropriate vehicle LVDS cable in the body harness.
  14. Connect all harness connectors at all components.
  15. Ignition ON, rear seat entertainment system ON.
  16. Verify both the P22 Video Displays turn on.
    • If the P22 Video Displays do not turn on. 

      Replace the vehicle LVDS cable connected to the A33 Media Disc Player.

    • Go to next step: If the P22 Video Displays turn on. 
  17. All OK.
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