Circuit/System Verification

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.

Ignition OFF, gear shift selector in PARK, ignition ON.
Verify that S39 Ignition Switch can be rotated to the ON position.
- If the ignition switch cannot be rotated to the ON position.
  Refer to Ignition Key Cannot Be Inserted, Rotated, or Removed from the Ignition Lock Cylinder .
- Go to next step: If the ignition switch can be rotated to the ON position
Ignition ON, parking brake applied, place the gear shift selector in NEUTRAL.
Verify that the S39 Ignition Switch cannot be rotated to the LOCK position.
- If the ignition switch can be rotated to the LOCK position and Ignition Key Cannot Be Inserted, Rotated, or Removed from the Ignition Lock Cylinder has NOT been performed
  Refer to Ignition Key Cannot Be Inserted, Rotated, or Removed from the Ignition Lock Cylinder .
- If the ignition switch can be rotated to the LOCK position and Ignition Key Cannot Be Inserted, Rotated, or Removed from the Ignition Lock Cylinder has been performed
  Refer to Circuit/System Testing below.
- Go to next step: If the ignition switch cannot be rotated to the LOCK position
All OK.