Circuit/System Verification

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2020 Buick Regal TourX, 2020 Buick Regal, 2019 Buick Regal TourX, 2019 Buick Regal, and 2018 Buick Regal TourX. However, it is still accessible from the selected car via links, so may be relevant.

Ignition/Vehicle & All vehicle systems - Off

NOTE:

The battery voltage should stabilize after a few minutes of turning the ignition/vehicle Off.

Test for 12.4 to 12.8 V between the test points: Battery Positive Post & Battery Negative Post
- If not between 12.4 and 12.8 V
  Refer to: Battery Inspection/Test
- Go to next step: If between 12.4 and 12.8 V
Engine - Running - For greater than 15 s
Accessories - Off
Test for 13.4 to 15 V between the test points: Battery Positive Post & Battery Negative Post
- If not between 13.4 and 15 V
  Refer to: Charging System Test
- Go to next step: If between 13.4 and 15 V
Verify the scan tool parameter: Battery Voltage @ Appropriate control module. = Within 1 V of the battery voltage
- If not within 1 V of each other
  Refer to: Circuit/System Testing
- Go to next step: If within 1 V of each other
Verify the scan tool parameter: Ignition Voltage @ Control Module = Within 1 V of the battery voltage
- If not within 1 V of each other
  Refer to: Circuit/System Testing
- Go to next step: If within 1 V of each other
All OK.