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.

WARNING:

Refer to Parking Brake and Drive Wheels Warning .

NOTE:

The engine may have to be started to move the shift lever out of the Park position. Once out of the Park position, the engine can be turned OFF.

Ignition ON.
Verify DTC P182E or P1915 was not set by reviewing the scan tool Freeze Frame/Failure Records.
- If DTC P182E or P1915 was set
  Refer to DTC P182E or P1915 .
- Go to next step: If DTC P182E or P1915 was not set
Verify the gear shift lever position matches the scan tool TCM Internal Mode Switch parameter while slowly moving the S3 Transmission Shift Lever from Park through all ranges.
- If the parameter does not display the correct values
  Refer to Range Selector Lever Cable Adjustment .
- Go to next step: If the parameter displays the correct values
Verify the Driver Shift Control Mode parameter displays Inactive with the S3 Transmission Shift Lever in the P (Park), R (Reverse), N (Neutral), and D (Drive) positions, and Active when left of D.
- If Inactive is not displayed
  Refer to Circuit/System Testing.
- Go to next step: If Inactive is displayed
Shift lever left of the D position.
Verify the scan tool Driver Shift Request parameter changes from Inactive to Upshift when the shift lever is pressed forward, and from Inactive to Downshift when the gear shift lever is pressed rearward.
- If the parameter does not display the correct values
  Refer to Circuit/System Testing.
- Go to next step: If the parameter displays the correct values
Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
Verify the DTC does not set.
- If the DTC sets
  Refer to Circuit/System Testing.
- Go to next step: If the DTC does not set
All OK.