Circuit/System Verification
WARNING: This page is about a different car, the 2016 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON.
- Verify the M9 Brake Booster Pump Motor turns ON and OFF when commanding the Brake Booster Electric Vacuum Pump On and Off with a scan tool.
- If the M9 Brake Booster Pump Motor does not turn ON and OFF
Refer to Circuit/System Testing.
- If the M9 Brake Booster Pump Motor turn ON and OFF
- If the M9 Brake Booster Pump Motor does not turn ON and OFF
- All OK.