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Home >> Toyota >> 2021 >> RAV4 LE, AWD >> 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] >> Caution / Notice / Hint

Caution / Notice / Hint

NOTE:

When replacing the skid control ECU (brake booster with master cylinder assembly), perform initialization and calibration of the linear solenoid valve.

Refer to UTILITY [11/2018 - 02/2019] , or refer to UTILITY [02/2019 - 12/2021]

HINT: 

When C1241, C1242 and/or C1253 are output together with C1257, inspect and repair the trouble areas indicated by C1241, C1242 and/or C1253 first.

for C1241 and C1242: Refer to DTC C1241: Low or High Power Supply Voltage; DTC C1242: Open Circuit in IG1/IG2 Power Source Circuit [11/2018 - 02/2019] , or refer to DTC C1241: Low or High Power Supply Voltage; DTC C1242: Open Circuit in IG1/IG2 Power Source Circuit [02/2019 - 06/2020] , or refer to DTC C1241: Low or High Power Supply Voltage; DTC C1242: Open Circuit in IG1/IG2 Power Source Circuit [06/2020 - 08/2020] , or refer to DTC C1241: Low or High Power Supply Voltage; DTC C1242: Open Circuit in IG1/IG2 Power Source Circuit [08/2020 - 12/2021] 

for C1253: Refer to DTC C1252: Brake Booster Pump Motor on Time Abnormally Long; DTC C1253: Pump Motor Relay [11/2018 - 02/2019] , or refer to DTC C1252: Brake Booster Pump Motor on Time Abnormally Long; DTC C1253: Pump Motor Relay [02/2019 - 12/2021]