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Home >> Buick >> 2016 >> Envision >> Repair and Diagnosis >> Engine Performance >> System >> Data Communication System >> Diagnostic Information and Procedures >> DTC U209E: Object Detection Control Module High Speed Communication Enable 1 >> Circuit/System Testing
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Circuit/System Testing

NOTE:

Use the schematic to determine which devices are on the K124 active safety control module's ignition circuit 9 X1. Use the connector end view to identify the object detection ignition circuit terminal for each of those devices.

  1. Ignition OFF, disconnect the harness connectors at an easily accessible device that shares the K124 active safety control module's ignition circuit 9 X1. Ignition ON.
  2. Verify that the DTC U209E remains current.
    • If the DTC becomes history 

      Replace the device that was just disconnected.

    • If the DTC remains current 
  3. With the prior devices disconnected, repeat steps 1 and 2 for each device on the ignition circuit except the K124 active safety control module.
  4. Ignition OFF, disconnect the X1 harness connector at the K124 active safety control module.
  5. Test for infinite resistance between the ignition circuit terminal 9 X1 at the K124 active safety control module and ground.
    • If less than infinite resistance 

      Repair the short to ground on the circuit.

    • If infinite resistance 
  6. Replace the K124 active safety control module.
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