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Home >> Chevrolet >> 2012 >> Orlando LS, Standard Trans >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Theft Deterrent System >> Diagnostic Information and Procedures >> Security Indicator Malfunction >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, remove the ignition key, open the driver door, disconnect the scan tool and disconnect the harness connector at the B10B Ambient Light/Sunload Sensor.
  2. Wait for 1 min, test for less than 5 Ω between the low reference circuit terminal 6 and ground.
    • If greater than 5 Ω 

      Repair the open/high resistance in the circuit.

    • If less than 5 Ω 
  3. Connect a test lamp between the control circuit terminal 1 and ground.
  4. Ignition ON, command the security LED ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
    • If the test lamp always illuminates 
    1. Ignition OFF, disconnect the X1 harness connector at the K9 Body Control Module.
    2. Ignition ON, test for less than 0.3 V between the control circuit and ground.
      • If greater than 0.3 V, repair the short to voltage on the circuit.
      • If less than 0.3 V, replace the K9 Body Control Module.
    • If the test lamp does not illuminate 
    1. Ignition OFF, disconnect the X1 harness connector at the K9 Body Control Module.
    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. Ignition OFF, 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 K9 Body Control Module.
    • If the test lamp illuminates as commanded 
  5. Replace the B10B Ambient Light/Sunload Sensor.
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