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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 591 (Anti-Lock Brake System) >> Diagnostic Information & Procedures >> DTC C0240-C0259: EBCM Detects Internal Malfunctions >> Circuit Description

Circuit Description

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The system relays are energized when the ignition is ON and the vehicle speed is greater than 6 km/h (4 mph). The system relay supplies voltage to the solenoid valves and to the pump motor. This voltage is referred to as the system voltage. The EBCM controls the solenoid valves by grounding the control circuit.

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