Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Cadillac >> 2009 >> SRX 3.6 7, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Entertainment Systems >> Cellular System, Entertainment System & Navigation System >> Diagnostic Information and Procedures >> Video Entertainment System Remote Control Inoperative >> Circuit/System Testing

Circuit/System Testing

NOTE: Test or replace the remote batteries before performing the circuit/system test.
  1. Ignition OFF, disconnect the harness connector at the rear display.
  2. Ignition OFF, test for less than 5.0 ohms between the ground circuit terminals listed below and ground:
    • Terminal 6
    • Terminal 14
    • If greater than specified range, test the ground circuit for an open/high resistance.
  3. Radio ON, test for B+ between the Entertainment Remote Enable Signal Circuit terminal 4 and ground.
    • If less than specified value, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
  4. Ignition ON, DVD playing, test for B+ between the infra red module control circuit terminal 15 and ground.
    • If less than specified value, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the rear seat audio module.
  5. Ignition ON, DVD playing, test for 0.75-2 volts between the infra red remote out signal (+) circuit terminal 8 and ground.
    • If less than specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
    • If greater than specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
  6. Ignition ON, DVD playing, test for less than 1 volt between the infra red remote out signal (-) circuit terminal 7 and ground.
    • If greater than specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
  7. Reconnect the harness connector at the infrared transmitter, and disconnect the X3 harness connector at the radio.
  8. Ignition ON, DVD playing, test for 4-6 mV AC between the remote infra red signal (+) circuit terminal 5 and ground.
    • If less than specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the rear display.
    • If greater than specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear display.
  9. Ignition ON, DVD playing, test for 4-6 mV AC between the remote infra red signal (-) circuit terminal 13 and ground.
    • If less than specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the rear display.
    • If greater than specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear display.
  10. Ignition ON, DVD playing, press any button on the remote control aimed at the infrared transmitter and test for 300-330 MHz between the remote infra red signal (+) circuit and ground.
    • If not within the specified range, replace the remote control.
  11. If all circuits test normal, replace the radio.
scientia non olet · About Mike's Workshop Manuals