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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 207 (Antilock Brake System) >> Diagnostic Information and Procedures >> DTC C025F, C0274, C0275, or C0280: Brake Master Cylinder Inlet and Isolation Valves Calibration Not Learned/Isolation Valve Calibration Not Learned/Dump Valve High Temperature/Stability System Active Too Long High Temperature >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

The solenoid valves are integral parts of the brake pressure modulator. The brake pressure modulator contains an isolation solenoid valve and a dump solenoid valve for each wheel and a traction/stability control supply solenoid valve and isolation solenoid valve for each brake circuit. The solenoid valves are not engaged during normal system operation. When the ABS, and the traction/stability control operation is required the electronic brake control module turns the required solenoid ON.

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