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Home >> Chevrolet >> 2021 >> Traverse L >> Repair and Diagnosis >> External Pages >> Different car >> Section 79 (Cruise Control System) >> Diagnostic Information and Procedures >> Cruise Control Malfunction >> Circuit/System Testing
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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.

Cruise Control Switch Signal

  1. Ignition/Vehicle & All vehicle systems - Off
  2. Disconnect the component:K9 Body Control Module
  3. Disconnect the component:Cruise Control Switch Assembly
  4. Ignition - On / Vehicle - In Service Mode
  5. Test for less than 1 V between the test points:
    • 12 V Reference circuit & Ground
    • Cruise Control Switch Signal & Ground
    • If 1 V or greater - Repair the short to voltage on the circuit.
    • Go to next step: If less than 1 V
  6. Ignition/Vehicle - Off
  7. Test for infinite resistance between the test points:
    • 12 V Reference circuit & Ground
    • Cruise Control Switch Signal & Ground
    • If less than infinite resistance - Repair the short to ground on the circuit.
    • Go to next step: If infinite resistance
  8. Test for less than 2 ohms between the test points:
    • 12 V Reference circuit @ Component harness & The other end of the circuit @ Control module harness
    • Cruise Control Switch Signal @ Component harness & The other end of the circuit @ Control module harness
    • If 2 ohms or greater - Repair the open/high resistance in the circuit.
    • Go to next step: If less than 2 ohms
  9. Test or replace the component:Cruise Control Switch Assembly
  10. Operate the vehicle within the Conditions for Running the DTC.Verify the DTC does not set.
    • If the DTC sets 

      Replace the component:K9 Body Control Module

    • Go to next step: If the DTC is not set 
  11. All OK.

Distance Sensing Cruise Control Gap Up/Down Switch Signal

  1. Ignition/Vehicle & All vehicle systems - Off
  2. Disconnect the component:K9 Body Control Module
  3. Disconnect the component:Cruise Control Switch Assembly
  4. Ignition - On / Vehicle - In Service Mode
  5. Test for less than 1 V between the test points:
    • 12 V Reference circuit & Ground
    • Distance Sensing Cruise Control Gap Up/Down Switch Signal & Ground
    • If 1 V or greater - Repair the short to voltage on the circuit.
    • Go to next step: If less than 1 V
  6. Ignition/Vehicle - Off
  7. Test for infinite resistance between the test points:
    • 12 V Reference circuit & Ground
    • Distance Sensing Cruise Control Gap Up/Down Switch Signal & Ground
    • If less than infinite resistance - Repair the short to ground on the circuit.
    • Go to next step: If infinite resistance
  8. Test for less than 2 ohms between the test points:
    • 12 V Reference circuit @ Component harness & The other end of the circuit @ Control module harness
    • Distance Sensing Cruise Control Gap Up/Down Switch Signal @ Component harness & The other end of the circuit @ Control module harness
    • If 2 ohms or greater - Repair the open/high resistance in the circuit.
    • Go to next step: If less than 2 ohms
  9. Test or replace the component:Cruise Control Switch Assembly
  10. Operate the vehicle within the Conditions for Running the DTC.Verify the DTC does not set.
    • If the DTC sets 

      Replace the component:K9 Body Control Module

    • Go to next step: If the DTC is not set 
  11. All OK.
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