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
- If the blower motor does not operate 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
- If any 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
- If the DTC is set
- A fault is not currently present and may be an intermittent condition.