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Home >> Toyota >> 2021 >> RAV4 LE, FWD >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System (W/O Vacuum Brake Booster) - Diagnostic Codes (4 Of 8) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster) >> DTC C1257: Power Supply Drive Circuit [11/2018 - 12/2021] >> Procedure

DTC C1257: Power Supply Drive Circuit [11/2018 - 12/2021]: Procedure

  1. REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY 
    1. Replace the skid control ECU (brake booster with master cylinder assembly).

      Refer to REMOVAL [11/2018 - 02/2019] , or refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020] , or refer to REMOVAL [08/2020 - 12/2021]

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