Circuit/System Verification

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.

Ignition On.
Verify there are no system voltage DTCs set as current or history in any control module.
- If any system voltage DTCs are set
  Diagnose these DTCs first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Go to next step: If no system voltage DTCs are set
Ignition Off and all vehicle systems off.

NOTE:

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

Verify the battery voltage is between 12.4 V to 12.8 V at the C1 Battery.
- If not between the specified range
  Refer to Battery Inspection/Test
- Go to next step: If between the specified range
Engine Running with all accessories off, allow the system voltage to stabilize.
Test for 13 V to 15 V at the C1 Battery.
- If not the specified value
  Refer to Charging System Test
- Go to next step: If the specified range
Verify DTC P0641, P0651, P0697, or P06A3 are not set as current.
- If DTC P0641, P0651, P0697, or P06A3 are set as current
  Replace the K 9 Body Control Module.
- Go to next step: If DTC P0641, P0651, P0697, or P06A3 are not set as current
A fault is not currently present and may be an intermittent condition.