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Home >> Cadillac >> 2017 >> CT6 Plug-In >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Cellular System, Entertainment System And Navigation System - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC B1265: Entertainment System Remote Enable Circuit >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, radio OFF, remove the radio B+ fuse.
  2. Disconnect the X1 harness connector at the K31 Navigation Control Module.
  3. Install the radio B+ fuse. Ignition ON, A11 Radio ON.
  4. Connect a test lamp between the control circuit terminal 2 and ground.
  5. Verify the test lamp turns ON and OFF when commanding the Remote Enable Circuit On and Off with a scan tool.
    • If the test lamp is always OFF 
    1. Ignition OFF, remove the test lamp, disconnect the X1 harness connector at the A11 Radio.
    2. Test for infinite resistance between the control circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • 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 A11 Radio.
    • If the test lamp is always ON 
    1. Ignition OFF, remove the test lamp, disconnect the X1 harness connector at the A11 Radio, ignition ON.
    2. Test for less than 1 V between the control circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the A11 Radio.
    • If the test lamp turns ON and OFF 
  6. Test or replace the K31 Navigation Control Module.
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