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Home >> Pontiac >> 2009 >> Torrent Base, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Entertainment Systems >> Cellular System, Entertainment System & Navigation System >> Diagnostic Information and Procedures >> Video Entertainment System Malfunction >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the video display.
  2. Ignition OFF, test for less than 10 ohms between the video display ground circuit terminal 6 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Test for less than 10 ohms between the video signal circuit terminal 2 and ground.
    • If greater than the specified range, test the signal circuit for an open/high resistance.
  4. Ignition ON, test for B+ between the voltage supply circuit terminal 7 and ground.
    • If less than the specified value, test the voltage supply circuit for a short to ground or an open/high resistance.
  5. Radio ON, test for B+ between the enable circuit terminal 8 and ground.
    • If less than the specified value, test the enable circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
  6. Radio ON, DVD playing in radio, test for 1-8 volts between the video bright control circuit terminal 9 and ground.
    • If less then specified range, test the circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
    • If greater then specified range, test the circuit for a short to voltage. If the circuit tests normal, replace the radio.
  7. Test for 0.1-3.0 volts between the video mode signal circuit terminal 10 and ground.
    • If less then specified range, test the circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
    • If greater then specified range, test the circuit for a short to voltage. If the circuit tests normal, replace the radio.
  8. Test for 1-3 volts between the video signal circuit terminal 1 and ground. The voltage will fluctuate in this range while the DVD is playing.
    • If less then specified range, test the circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
    • If greater then specified range, test the circuit for a short to voltage. If the circuit tests normal, replace the radio.
  9. If all circuits test normal, replace the video display.
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