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HOMESERVICE MANUALSCHEVROLET2006SUBURBAN C1500, 5.3 ZREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1901 (CELLULAR SYSTEM, ENTERTAINMENT SYSTEM, AND NAVIGATION SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESVIDEO ENTERTAINMENT SYSTEM MALFUNCTION (X88/Z88)CIRCUIT/SYSTEM TESTING
2006 Chevrolet Suburban C1500, 5.3 Z

Circuit/System Testing

2006 Chevrolet Suburban C1500, 5.3 ZSECTION Circuit/System Testing
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

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.
RENDER: 1.0x

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