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Circuit/System Testing

WARNING: This page is about a different car, the 2024 Chevrolet Silverado EV. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition/Vehicle & All vehicle systems - Off.
  2. Disconnect the appropriate electrical connector: X1 @ X85 Steering Wheel Air Bag Coil.
  3. Test for less than 2M Ω between the test points: Low Reference circuit terminal 18 & Ground.
    • If 2M Ω or greater 
    1. Disconnect the electrical connector: X1 @ K180 Driver Monitoring System Control Module.
    2. Test for less than 2 ohms between the test points: Low Reference circuit terminal 18 @ Component harness & Terminal 7 X1 @ Control module harness.
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component: K180 Driver Monitoring System Control Module.
    • Go to next step: If less than 2.0M Ω 
  4. Ignition - On / Vehicle - In Service Mode.
  5. Test for 21.0 - 24.0 V between Control circuit terminal 13 and ground.
    • If greater than 24.0 V 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector: X1 @ K180 Driver Monitoring System Control Module.
    3. Ignition - On / Vehicle - In Service Mode.
    4. Test for less than 1 V between the test points: Control circuit terminal 9 @ Component harness & Ground.
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • If less than 1 V - Replace the component: K180 Driver Monitoring System Control Module.
    • If less than 21.0 V 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector: X1 @ K180 Driver Monitoring System Control Module.
    3. Test for infinite resistance between the test points: Control circuit terminal 9 @ Component harness & Ground.
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • Go to next step: If infinite resistance
    4. Test for less than 2 Ω in the circuit end to end.
      • If 2 Ω or greater - Repair the open/high resistance in the circuit.
      • Go to next step: If less than 2 Ω
    5. Replace the component: K180 Driver Monitoring System Control Module.
    • Go to next step: If between 21.0 - 24.0 V 
  6. Ignition/Vehicle & All vehicle systems - Off.
  7. Test for infinite resistance between the test points: Control circuit terminal 13 & Ground.
    • If less than infinite resistance 

      Repair short to ground on the circuit.

    • Go to next step: If infinite resistance 
  8. Test for less than 2 ohms between the test points: Control circuit terminal 13 & The other end of the circuit.
    • If greater than 2 ohms 

      Repair the open/high resistance in the circuit.

    • Go to next step: If less than 2 ohms 
  9. Replace the component: P51 Lane Centering Indicators - Steering Wheel.
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