Circuit/System Verification

WARNING: This page is about a different car, the 2022 Cadillac CT5. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

If the vehicle is equipped with RPO KSG, it also has Adaptive Cruise Control. Refer to the Object Detection or the Driver Assistance Systems subsection for schematics, diagnostics, and description and operation related to Adaptive Cruise Control functions.

Ignition On/Vehicle in Service Mode.
Verify that the stop lamps operate properly and that no B22 Brake Pedal Position Sensor related DTCs are set.
- If brake pedal position sensor related DTCs are set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle
- Go to next step: If no brake pedal position sensor related DTCs are set
Verify the scan tool K9 Body Control Module Cruise Control Switch Status parameter changes between Off and On, Resume and Set when switching between each position on the cruise control switch.
- If the parameter does not change
  Refer to Circuit/System Testing.
- Go to next step: If the parameter changes
Verify that no conditions that may inhibit cruise control operation are present. Refer to the K20 Engine Control Module scan tool data list Cruise Control Inhibit Reason parameter. Refer to the Cruise Control Description and Operation for a list of inhibit reasons.
- If the cruise control system has a reason why it is inhibited
  Repair the condition that is causing the inhibit reason.
- Go to next step: If the cruise control system does not have any reasons why it may be inhibited
Verify that no cruise control related DTCs are set.
- If any cruise control related DTCs are set
  Refer to Circuit/System Testing.
- Go to next step: If no cruise control related DTCs are set
All OK.