Circuit/System Verification

Ignition ON.
Verify that DTC C025E is not set.
- If the DTC is set
  Refer to DTC C025E .
- Go to next step: If the DTC is not set
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 brake booster pump motor does not turn ON and OFF
  Refer to Circuit/System Testing.
- Go to next step: If the 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.