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Home >> Toyota >> 2006 >> Prius >> Repair and Diagnosis >> Brakes >> Traction Control >> Brake Control System >> Electronically Controlled Brake System >> DTC C1315/31 SMC1 Changeover Solenoid Malfunction; DTC C1316/32 SMC2 Changeover Solenoid Malfunction; DTC C1352/21 Front Increasing Pressure Solenoid RH Malfunction; DTC C1353/23 Front Increasing Pressure Solenoid LH Malfunction; DTC C1354/25 Rear Increasing Pressure Solenoid RH Malfunction; DTC C1355/27 Rear Increasing Pressure Solenoid LH Malfunction; DTC C1356/22 Front Decreasing Pressure Solenoid RH Malfunction; DTC C1357/24 Front Decreasing Pressure Solenoid LH Malfunction; DTC C1358/26 Rear Decreasing Pressure Solenoid RH Malfunction; DTC C1359/28 Rear Decreasing Pressure Solenoid LH Malfunction >> Inspection Procedure

Inspection Procedure

NOTE: When replacing the skid control ECU, perform initialization of linear solenoid valve and calibration (see INITIALIZATION  ).
  1. INSPECT BRAKE ACTUATOR ASSEMBLY 
    1. Disconnect the brake actuator connector.
    2. Measure the resistance of the actuator.

      HINT:

      Check the brake actuator when it is cooled down.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      20 (SMC1) - 7 (BS2) 14.6 to 24.6 Ω
      6 (SMC2) - 19 (BS1) 14.6 to 24.6 Ω
      8 (FR+) - 5 (FR-) 3.5 to 4.3 Ω
      22 (FR+) - 21 (FR-) 3.5 to 4.3 Ω
      13 (FL+) - 14 (FL-) 3.5 to 4.3 Ω
      27 (FL+) - 28 (FL-) 3.5 to 4.3 Ω
      12 (RR+) - 11 (RR-) 3.5 to 4.3 Ω
      10 (RL+) - 9 (RL-) 3.5 to 4.3 Ω

    NG : REPLACE BRAKE ACTUATOR ASSEMBLY 

    Fig 1: Inspecting Brake Actuator Assembly
    G04474648Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK : GO TO NEXT STEP 

  2. CHECK SKID CONTROL ECU (VALVE VOLTAGE) 
    Fig 2: Checking Skid Control ECU (Valve Voltage)
    G04474649Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage of the ECU connector.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      S7-4 (SMC1) - Body ground Power switch ON (READY) Brake pedal released Below 10 to 14 V
      S10-3 (SMC2) - Body ground Power switch ON (READY) Brake pedal released Below 10 to 14 V
      S7-7 (SLAFR+) - Body ground Power switch ON (READY) Brake pedal released Pulse generation*
      S7-6 (SLAFR-) - Body ground Power switch ON (READY) Brake pedal released Pulse generation*
      S10-1 (SLAFL+) - Body ground Power switch ON (READY) Brake pedal released Pulse generation*
      S10-2 (SLAFL-) - Body ground Power switch ON (READY) Brake pedal released Pulse generation*
      S10-19 (SLARR+) - Body ground Power switch ON (READY) Brake pedal released Pulse generation*
      S10-9 (SLARR-) - Body ground Power switch ON (READY) Brake pedal released Pulse generation*
      S7-15 (SLARL+) - Body ground Power switch ON (READY) Brake pedal released Pulse generation*
      S7-27 (SLARL-) - Body ground Power switch ON (READY) Brake pedal released Pulse generation*
      S7-17 (SLRFR+) - Body ground Power switch ON (READY) Brake pedal released Below 1.5 V
      S10-8 (SLRFL+) - Body ground Power switch ON (READY) Brake pedal released Below 1.5 V
      S10-20 (SLRRR+) - Body ground Power switch ON (READY) Brake pedal released Below 1.5 V
      S7-16 (SLRRL+) - Body ground Power switch ON (READY) Brake pedal released Below 1.5 V
      S7-34 (SLRFR-) - Body ground Power switch ON (READY) Below 1.5 V
      S10-26 (SLRFL-) - Body ground Power switch ON (READY) Brake pedal released Below 1.5 V
      S10-18 (SLRRR-) - Body ground Power switch ON (READY) Brake pedal released Below 1.5 V
      S7-26 (SLRRL-) - Body ground Power switch ON (READY) Brake pedal released Below 1.5 V

      HINT:

      *: Refer to waveform 5 of "TERMINALS OF ECU " .

    NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK : REPLACE SKID CONTROL ECU 

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