Circuit/System Verification

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.
- Go to next step: If the M9 Brake Booster Pump Motor turn ON and OFF
Verify that the brake booster vacuum system has no damage, leakage or incorrect installation.
- If damage, leakage or incorrect installation is found
  Refer to Brake Assist System Diagnosis .
- Go to next step: If the inspection is OK
All OK.