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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System (Except HV) - Diagnostic Codes (2 Of 3) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model) >> DTC C0597-49: Brake System Control Module "A" Internal Electronic Failure; DTC C12A5-1C: Left Front Wheel ABS Hold Solenoid Control Circuit Voltage Out of Range; DTC C12B0-1C: Left Front Wheel ABS Release Solenoid Control Circuit Voltage Out of Range; DTC C12BB-1C: Right Front Wheel ABS Hold Solenoid Control Circuit Voltage Out of Range; DTC C12C6-1C: Right Front Wheel ABS Release Solenoid Control Circuit Voltage Out of Range; DTC C12D1-1C: Left Rear Wheel ABS Hold Solenoid Control Circuit Voltage Out of Range; DTC C12DC-1C: Left Rear Wheel ABS Release Solenoid Control Circuit Voltage Out of Range; DTC C12E7-1C: Right Rear Wheel ABS Hold Solenoid Control Circuit Voltage Out of Range; DTC C12F2-1C: Right Rear Wheel ABS Release Solenoid Control Circuit Voltage Out of Range; DTC C12F6-62: Left Front Wheel ABS Hold Solenoid / Right Front Wheel ABS Hold Solenoid Signal Compare Failure; DTC C12F7-62: Left Rear Wheel ABS Hold Solenoid / Right Rear Wheel ABS Hold Solenoid Signal Compare Failure; DTC C13BF-62: Brake Pressure Control Solenoid A/B Signal Compare Failure; DTC C13C0-1C: Brake Pressure Control Solenoid "A" Control Circuit Voltage Out of Range; DTC C13C9-1C: Brake Pressure Control Solenoid "B" Control Circuit Voltage Out of Range [12/2019 - ] >> Procedure

DTC C0597-49: Brake System Control Module "A" Internal Electronic Failure; DTC C12A5-1C: Left Front Wheel ABS Hold Solenoid Control Circuit Voltage Out of Range; DTC C12B0-1C: Left Front Wheel ABS Release Solenoid Control Circuit Voltage Out of Range; DTC C12BB-1C: Right Front Wheel ABS Hold Solenoid Control Circuit Voltage Out of Range; DTC C12C6-1C: Right Front Wheel ABS Release Solenoid Control Circuit Voltage Out of Range; DTC C12D1-1C: Left Rear Wheel ABS Hold Solenoid Control Circuit Voltage Out of Range; DTC C12DC-1C: Left Rear Wheel ABS Release Solenoid Control Circuit Voltage Out of Range; DTC C12E7-1C: Right Rear Wheel ABS Hold Solenoid Control Circuit Voltage Out of Range; DTC C12F2-1C: Right Rear Wheel ABS Release Solenoid Control Circuit Voltage Out of Range; DTC C12F6-62: Left Front Wheel ABS Hold Solenoid / Right Front Wheel ABS Hold Solenoid Signal Compare Failure; DTC C12F7-62: Left Rear Wheel ABS Hold Solenoid / Right Rear Wheel ABS Hold Solenoid Signal Compare Failure; DTC C13BF-62: Brake Pressure Control Solenoid A/B Signal Compare Failure; DTC C13C0-1C: Brake Pressure Control Solenoid "A" Control Circuit Voltage Out of Range; DTC C13C9-1C: Brake Pressure Control Solenoid "B" Control Circuit Voltage Out of Range [12/2019 - ]: Procedure

  1. CLEAR DTC 
    1. Clear the DTCs.

      Chassis > Brake/EPB > Clear DTCs 

    2. Turn the ignition switch off.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  2

  2. RECONFIRM DTC 
    1. Based on the Freeze Frame Data and interview with the customer, attempt to reproduce the conditions when the malfunction occurred.
    2. Check if the same DTC is output.

      Chassis > Brake/EPB > Trouble Codes 

      Result

      Result Proceed to
      DTCs C0597-49, C12A5-1C, C12B0-1C, C12BB-1C, C12C6-1C, C12D1-1C, C12DC-1C, C12E7-1C, C12F2-1C, C12F6-62, C12F7-62, C13BF-62, C13C0-1C and C13C9-1C are not output. A
      DTCs C0597-49, C12A5-1C, C12B0-1C, C12BB-1C, C12C6-1C, C12D1-1C, C12DC-1C, C12E7-1C, C12F2-1C, C12F6-62, C12F7-62, C13BF-62, C13C0-1C and/or C13C9-1C are output. B

      HINT: 

      • If a speed signal of 6 km/h (4 mph) or more is input to the skid control ECU (brake actuator assembly), with the ignition switch turned to ON and the stop light switch off, the ECU performs self-diagnosis of the solenoid circuit.
      • If the normal system code is output (no DTCs are output), slightly jiggle the connectors, wire harness, and fuses of the skid control ECU (brake actuator assembly).
      • If any DTCs are output while jiggling a connector or wire harness of the skid control ECU (brake actuator assembly), inspect and repair the connector or wire harness.
      • If no DTCs were output when reconfirming DTCs, checking for intermittent problems is necessary because it is suspected that the original DTCs were stored due to the poor connection of a connector terminal.

    Result: 

    A 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ] 

    Result: 

    B 

    REPLACE BRAKE ACTUATOR ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022]  , or refer to  REMOVAL [10/2022 - 11/2023]  , or refer to  REMOVAL [11/2023 - ] 

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