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Home >> Cadillac >> 2018 >> CT6 Plug-In >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Driver Monitoring System >> Diagnostic Information and Procedures >> DTC B392E >> Circuit/System Testing
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Circuit/System Testing

  1. Ignition/Vehicle & All vehicle systems - Off
  2. Disconnect the appropriate electrical connector: X1 @X85 Steering Wheel Air Bag Coil
  3. Ignition - On / Vehicle - In Service Mode
  4. Test for less than 10 ohms between the test points: Low Reference circuit terminal 4 & Ground
    • If 10 ohms 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 4 @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 10 ohms 
  5. Ignition - On / Vehicle >> In Service Mode
  6. Test for less than 1 V between the test points: Control circuit terminal 6 & Ground
    • If greater than 1 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
    • Go to next step: If less than 1 V 
  7. Test for less than 1 V between the test points: Signal circuit terminal 3 & Ground
    • If greater than 1 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: Signal circuit terminal 8 @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
    • Go to next step: If less than 1 V 
  8. Ignition/Vehicle & All vehicle systems >> Off
  9. Test for infinite resistance between the test points: Control circuit terminal 6 & Ground
    • If less than infinite resistance 

      Repair short to ground on the circuit.

    • Go to next step: If infinite resistance 
  10. Test for infinite resistance between the test points: Control circuit terminal 3 & Ground
    • If less than infinite resistance 

      Repair short to ground on the circuit.

    • Go to next step: If infinite resistance 
  11. Test for less than 2 ohms between the test points: Control circuit terminal 6 & 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 
  12. Test for less than 2 ohms between the test points: Control circuit terminal 3 & 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 
  13. Replace the component: P51 Lane Centering Indicators - Steering Wheel
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