Circuit/System Verification

WARNING: This page is about a different car, the 2015 Chevrolet Trax and 2015 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.

Ignition ON.
Deplete the vacuum in the brake booster and verify the M9 Brake Booster Pump Motor turns ON
- If the M9 Brake Booster Pump Motor does not turn ON
  Refer to Circuit/System Testing.
- If the M9 Brake Booster Pump Motor turns ON
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 .
- If the inspection is OK
All OK.