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Home >> Toyota >> 2017 >> 4Runner TRD Pro >> Repair and Diagnosis >> Brakes >> Anti-Lock Brakes >> Vehicle Stability Control System (For Hydraulic Brake Booster) - Diagnostic Codes (43, C0226-C1422) >> VEHICLE STABILITY CONTROL SYSTEM (for Hydraulic Brake Booster) >> DTC C1257: Power Supply Drive Circuit [08/2015 - ] >> Description

DTC C1257: Power Supply Drive Circuit [08/2015 - ]: Description

The motor relay (semiconductor relay) is built into the master cylinder solenoid and drives the pump motor based on a signal from the skid control ECU.

DTC Code DTC Detection Condition Trouble Area
C1257 There is an open in the motor system circuit (motor input circuit). Master cylinder solenoid (Skid control ECU)