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Home >> Buick >> 2018 >> Enclave Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Memory Modules >> Secondary And Configurable Customer Controls >> Diagnostic Information and Procedures >> Drive Mode Switch Malfunction (Sport Switch) >> Circuit/System Testing

Circuit/System Testing

NOTE:

It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

  1. Ignition/Vehicle & All vehicle systems - Off
  2. Disconnect the electrical connector: S86 Vehicle Stability Control Switch
  3. Test for less than 10 ohms between the test points: Ground circuit terminal 3 & Ground
    • If 10 ohms or greater 
    1. Test for less than 2 ohms between the test points: Ground circuit terminal 3 @ Component harness & Ground terminal
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Repair the open/high resistance in the ground connection.
    • Go to next step: If less than 10 ohms 
  4. Ignition - On/Vehicle - In Service Mode
  5. Headlamp Switch=On
  6. Verify a test lamp turns On between the test points: Control circuit terminal 8 & Ground
    • Go to next step: If the test lamp turns On 
  7. Ignition/Vehicle - Off & Remove - Test lamp
  8. Connect the electrical connector: S86 Vehicle Stability Control Switch
  9. Disconnect the electrical connector: X3 @ K9 Body Control Module
  10. Test for infinite resistance between the test points: Signal circuit terminal 23 X3 & Ground
    • If less than infinite resistance 
    1. Disconnect the electrical connector: S86 Vehicle Stability Control Switch
    2. Test for infinite resistance between the test points: Signal circuit terminal 23 X3 & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • If infinite resistance - Replace the component: S86 Vehicle Stability Control Switch
    • Go to next step: If infinite resistance 
  11. Press and hold the switch: Sport Mode @ S86 Vehicle Stability Control Switch

    Test for less than 10 ohms between the test points: Signal circuit terminal 23 X3 & Ground

    • If 10 ohms or greater 
    1. Disconnect the electrical connector: S86 Vehicle Stability Control Switch
    2. Test for less than 2 ohms between the test points: Signal circuit terminal 23 X3 @ Control module harness & Signal circuit terminal 10 @ Component harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component: S86 Vehicle Stability Control Switch
    • Go to next step: If less than 10 ohms 
  12. Connect the electrical connector: X3 @ K9 Body Control Module
  13. Disconnect the electrical connector: X5 @ K9 Body Control Module
  14. Ignition - On/Vehicle - In Service Mode
  15. Headlamp Switch = On
  16. Verify the component works as specified: Sport Mode - LED (Light Emitting Diode) @ S86 Vehicle Stability Control Switch = Off
    • If the component does not work as specified 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector: S86 Vehicle Stability Control Switch
    3. Test for infinite resistance between the test points: Control circuit terminal 23 X5 @ Control module harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • If infinite resistance - Replace the component: S86 Vehicle Stability Control Switch
    • Go to next step: If the component works as specified 
  17. Connect a 3 A fused jumper wire between the test points: Control circuit terminal 23 X5 & Ground

    Verify the component works as specified: Sport Mode - LED (Light Emitting Diode) @ S86 Vehicle Stability Control Switch = On

    • If the component does not work as specified 
    1. Disconnect the electrical connector: S86 Vehicle Stability Control Switch
    2. Test for less than 1 V between the test points: Control circuit terminal 23 X5 @ Control module harness & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • Go to next step: If less than 1 V
    3. Ignition/Vehicle - Off
    4. Test for less than 2 ohms between the test points: Control circuit terminal 23 X5 @ Control module harness & Control circuit terminal 6 @ Component harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component: S86 Vehicle Stability Control Switch
    • Go to next step: If the component works as specified 
  18. Replace the component: K9 Body Control Module
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