Circuit/System Testing

Without DNU

1. Ignition OFF, disconnect the harness connector at the DVD display.
2. Test for less than 5.0 ohms between the ground circuit terminal 6 and ground.
   • If greater than specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, DVD playing, test for B+ between the entertainment remote enable B+ circuit terminal 8 and ground.
   • If less than specified value, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
4. Ignition ON, test for B+ between the battery positive voltage circuit terminal 7 and ground.
   • If less than specified value, test the voltage supply circuit for a short to ground or an open/high resistance.
5. Ignition ON, DVD playing, test for 1-8 volts between the video bright control circuit terminal 9, and ground.
   • If greater then specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the radio.
   • If less then specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
6. Ignition ON, DVD playing, test for 40 mV -3.0 volts between the video mode signal circuit terminal 10, and ground.
   • If greater then specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
   • If less then specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
7. Ignition OFF, disconnect the X3 harness connector at the radio.
8. Test for less than 5 ohms between the DVD display terminal 1 and the radio X3 harness connector terminal 7.
   • If greater than specified range, test the ground circuit for an open/high resistance.
9. If all circuits test normal, replace the DVD display.
10. Ignition ON, DVD playing, Verify the DVD display operates normally.
    • If the DVD display does not operate normally, replace the radio.

With DNU - One Display Not Functioning

1. Ignition OFF, disconnect the harness connector at the appropriate DVD screen.
2. Test for less than 5.0 ohms between the ground circuit terminal 6 and ground.
   • If greater than specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, DVD playing, test for B+ between the entertainment remote enable B+ circuit terminal 8 and ground.
   • If less than specified value, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the video signal splitter.
4. Test for B+ between the battery positive voltage circuit terminal 7 and ground.
   • If less than specified value, test the voltage supply circuit for a short to ground or an open/high resistance.
5. Ignition ON, DVD playing, test for 1-8 volts between the video bright control circuit terminal 9, and ground.
   • If greater then specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the video signal splitter.
   • If less then specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the video signal splitter.
6. Ignition ON, DVD playing, test for 40 mV-3.0 volts between the video mode signal circuit terminal 10, and ground.
   • If greater then specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the video signal splitter.
   • If less then specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the video signal splitter.
7. Ignition OFF, disconnect the appropriate harness connector at the video signal splitter.
   • Front Display- X2
   • Rear Display (DNU)- X3
8. Test for less than 5 ohms between the DVD display terminal 1 and the video signal splitter harness connector terminal 1.
   • If greater than specified range, test the ground circuit for an open/high resistance.
9. If all circuits test normal, replace the DVD display.
10. Ignition ON, DVD playing, verify the DVD display operates normally.
    • If the DVD display does not operate normally, replace the radio.

With DNU - Two Displays Not Functioning

1. Ignition OFF, disconnect the X1 harness connector at the video signal splitter.
2. Test for less than 5.0 ohms between the ground circuit terminal 2 and ground.
   • If greater than specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, DVD playing, test for B+ between the entertainment remote enable B+ circuit terminal 11 and ground.
   • If less than specified value, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
4. Test for B+ between the battery positive voltage circuit terminal 6 and ground.
   • If less than specified value, test the voltage supply circuit for a short to ground or an open/high resistance.
5. Ignition ON, DVD playing, test for 1-8 volts between the video bright control circuit terminal 8, and ground.
   • If greater then specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the radio.
   • If less then specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
6. Ignition ON, DVD playing, test for 40 mV-3.0 volts between the video mode signal circuit terminal 16, and ground.
   • If greater then specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
   • If less then specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
7. Ignition OFF, disconnect the X3 harness connector at the radio.
8. Test for less than 5 ohms between the video signal splitter X1 terminal 1 and the radio X3 harness connector terminal 7.
   • If greater than specified range, test the ground circuit for an open/high resistance.
9. If all circuits test normal, perform the circuit/system testing with DNU -- One Display Not Functioning for each display.