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DTC C1257/57: Power Supply Drive Circuit [08/2013 - ]: Procedure

WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
  1. REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY 
    1. Replace the skid control ECU (brake booster with master cylinder assembly). Refer to REMOVAL [08/2013 - ] .

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