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Home >> Chevrolet >> 2021 >> Traverse L >> Repair and Diagnosis >> External Pages >> Different car >> Section 68 (Driver Assistance Systems) >> Diagnostic Information and Procedures >> DTC B13AC >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2020 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the X3 connector at the K9 Body Control Module, ignition ON.
  2. Verify the lane keep assist indicator is not illuminated.
    • If the indicator is illuminated 
    1. Test circuit 3152 for a short to voltage.
      • If a short to voltage is found, repair the fault on the circuit.
      • Go to next step: If a short to voltage is not found
    2. Replace the S26 Hazard Warning Switch.
    • Go to next step: If the indicator is not illuminated 
  3. Connect a 3 A fused jumper wire between control circuit terminal 13 and B+.
  4. Verify the lane keep assist indicator is illuminated.
    • Go to next step: If the indicator is not illuminated 
    1. Test circuit 1450 for an open/high resistance.
      • If an open/high resistance is found, repair the fault on the circuit or the ground connection.
      • Go to next step: If an open/high resistance is not found
    2. Test circuit 3152 for a short to ground.
      • If a short to ground is found, repair the fault on the circuit.
      • Go to next step: If an open/high resistance is not found
    3. Test circuit 3152 for an open/high resistance.
      • If an open/high resistance is found, repair the fault on the circuit.
      • Go to next step: If an open/high resistance is not found
    4. Replace the S26 Hazard Warning Switch.
    • If the indicator is illuminated 
  5. Replace the K9 Body Control Module.
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