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Home >> Chevrolet >> 2014 >> Volt >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System >> Diagnostic Information and Procedures >> DTC C0552 or C121D: Improper Shutdown Malfunction/Brake Control Module >> Circuit/System Description
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Circuit/System Description

The electronic brake control module monitors the number of Vehicle in Service Mode and Vehicle OFF cycles. When it detects that a Vehicle OFF cycle was incomplete or non-existent this fault will set. This means the fault reports a problem that occurred at the end of the previous ignition cycle. If this occurs during an electronic brake control module service operation, any calibrations or offsets learned during that service operation may not be properly stored in memory.