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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 63 (Hydraulic Brake System) >> Diagnostic Information and Procedures >> Brake Booster Pump Motor Malfunction >> Diagnostic Fault Information

Diagnostic Fault Information

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.
Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Vacuum Pump Relay B+ 2 2 - -
Vacuum Pump Relay Control 2 2 1 -
Vacuum Pump Relay Ground - 2 - -
Brake Booster Vacuum Sensor 5V Reference C1100 00 C1100 00 C1100 00, C1100 01 -
Brake Booster Vacuum Sensor Signal C1100 00, C1100 02 C1100 00 C1100 00, C1100 01 C1100 09, C1100 5A
Brake Booster Vacuum Sensor Low Reference - C1100 00 - -
Brake Booster Pump Motor Control 2 2 1 -
Brake Booster Pump Motor Ground - 2 - -
1. Brake Booster Pump Motor Always ON
2. Brake Booster Pump Motor Always OFF