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Home >> Chevrolet >> 2001 >> Astro Van Cargo, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 602 (Anti-Lock Brake System) >> Diagnostic Information And Procedures >> DTC C1261: LF Inlet Valve Solenoid Malfunction; C1262: LF Outlet Valve Solenoid Malfunction; C1263: RF Inlet Valve Solenoid Malfunction; C1264: RF Outlet Valve Solenoid Malfunction; C1265: LR Inlet Valve Solenoid Malfunction; C1266: LR Outlet Valve Solenoid Malfunction; C1267: RR Inlet Valve Solenoid Malfunction; C1268: RR Outlet Valve Solenoid Malfunction; C1271: LF TCS Master Cylinder Isolation Valve Malfunction; C1272: LF TCS Prime Valve Malfunction; C1273: RF TCS Master Cylinder Isolation Valve Malfunction; C1274: RF TCS Prime Valve Malfunction >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

The system relay is energized when the ignition is ON. The system relay supplies voltage to the valve solenoids and the pump motor. This voltage is referred to as the system voltage. The EBCM microprocessor activates the valve solenoids by grounding the control circuit.