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/ Vehicle in Service Mode.
Verify the blower motor operates properly with the blower motor switch in each speed position.
- If the blower motor does not operate properly in each speed position
  Refer to Blower Motor Malfunction .
- Go to next step: If the blower motor operates properly in each speed position
Verify DTC B2B02, B2B03 or B2B0C is not set.
- If any of the DTCs are set
  Refer to Circuit/System Testing
- Go to next step: If none of the DTCs are set
Verify DTC B2B0B is not set.
- If the DTC is set
  Replace the M8 Blower Motor.
- Go to next step: If the DTC is not set
A fault is not currently present and may be an intermittent condition.