ELECTRONICALLY CONTROLLED BRAKE SYSTEM, Diagnostic DTC:C1300

DTC Code DTC Name
C1300 Skid Control ECU Malfunction

DESCRIPTION

The skid control ECU (brake booster with master cylinder assembly) stores this DTC if malfunctions are found in the circuit inside the ECU by self diagnosis.

DTC No. Detection Item INF Code DTC Detection Condition Trouble Area Note
C1300 Skid Control ECU Malfunction 1028 to 1049
  • INF Code: 1028 to 1044, 1047 to 1049


    • Skid control ECU (brake booster with master cylinder assembly) internal malfunction.

  • INF Code: 1046


    • Sudden drop of power source voltage or skid control ECU (brake booster with master cylinder assembly) internal malfunction.

  • INF Code: 1045


    • An open is detected in the brake booster pump assembly circuit or skid control ECU (brake booster with master cylinder assembly) internal malfunction.


  • INF Code: 1028 to 1044, 1047 to 1049


    • Skid control ECU (brake booster with master cylinder assembly)

  • INF Code: 1046


    • Auxiliary battery

    • Hybrid control system (Charging circuit)

    • Skid control ECU (brake booster with master cylinder assembly)

  • INF Code: 1045


    • Brake booster pump assembly

    • Wire harness or connector

    • Skid control ECU (brake booster with master cylinder assembly)

Electronically controlled brake system DTC

WIRING DIAGRAM

Refer to DTCs C1252 and C1253.

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CAUTION / NOTICE / HINT

Note

After replacing the skid control ECU (brake booster with master cylinder assembly), perform linear solenoid valve offset learning, ABS holding solenoid valve learning, yaw rate and acceleration sensor zero point calibration and system information memorization after performing "Reset Memory".

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PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs.


      Chassis > ABS/VSC/TRC > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT
  2. CHECK DTC


    1. Turn the power switch off.

    2. Turn the power switch on (IG).

    3. Check if the same DTC is output.


      Chassis > ABS/VSC/TRC > Trouble Codes
      Result
      Result Proceed to
      Only C1300 is output A
      Other than above B

    B
    A
  3. CHECK FREEZE FRAME DATA


    1. Check the INF code from the Freeze Frame Data stored when DTC (C1300) was stored.


      Chassis > ABS/VSC/TRC > DTC(C1300) > Freeze Frame Data
      Tester Display
      Detailed Freeze DTC
      Result
      Result Proceed to
      INF codes 1028 to 1044 or 1047 to 1049 are output. A
      INF code 1046 is output. B
      INF code 1045 is output. C

    A
    C
    B
  4. CHECK FREEZE FRAME DATA


    1. Using the GTS, read the "IG1 Voltage Value", "IG2 Voltage Value", "BS1 Voltage Value", "BS2 Voltage Value", "VM1 Voltage Value" and "VM2 Voltage Value" of the Freeze Frame Data stored when the DTC C1300 (INF code 1046) was stored.


      Chassis > ABS/VSC/TRC > DTC(C1300) > Freeze Frame Data
      Tester Display
      Detailed Freeze DTC
      IG1 Voltage Value
      IG2 Voltage Value
      BS1 Voltage Value
      BS2 Voltage Value
      VM1 Voltage Value
      VM2 Voltage Value
      Result
      Result Proceed to
      The value of any IG1 Voltage Value, IG2 Voltage Value, BS1 Voltage Value, BS2 Voltage Value, VM1 Voltage Value, VM2 Voltage Value is 7.00 V or less A
      The value of all IG1 Voltage Value, IG2 Voltage Value, BS1 Voltage Value, BS2 Voltage Value, VM1 Voltage Value, VM2 Voltage Value is 12.00 V or more B

      Tech Tips

      If any of the voltage values of the Freeze Frame Data are 7.00 V or less, a sudden drop of the power source voltage is suspected as a cause of the DTC output.

      In this case, inspect the auxiliary battery and replace or recharge the auxiliary battery as necessary.


    B
    A
  5. CHECK AUXILIARY BATTERY


    1. Check the auxiliary battery voltage.

      Standard Voltage
      Tester Connection Condition Specified Condition
      Auxiliary battery Power switch on (IG) 11 to 14 V
      Auxiliary battery Power switch on (READY) 11 to 15.5 V
      Result
      Proceed to
      OK
      NG

    OK
    NG
  6. CHECK AUXILIARY BATTERY


    1. Check the auxiliary battery voltage.

      Standard Voltage
      Tester Connection Condition Specified Condition
      Auxiliary battery Power switch on (IG) 11 to 14 V
      Auxiliary battery Power switch on (READY) 11 to 15.5 V
      Result
      Proceed to
      OK
      NG

    OK
    NG
  7. INSPECT BRAKE BOOSTER PUMP ASSEMBLY


    1. B004QXKC10
      *a

      Component without harness connected

      (Brake Booster Pump Assembly)

      Turn the power switch off.

    2. Make sure that there is no looseness at the locking part and the connecting part of the connector.

      OK
      The connector is securely connected.
    3. Disconnect the A12 brake booster pump assembly connector.

    4. Check both the connector case and the terminals for deformation and corrosion.

      OK
      No deformation or corrosion.
    5. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      A12-2 (BM1) - A12-4 (GND1) Always 10 Ω or less
      A12-1 (BM2) - A12-3 (GND2) Always 10 Ω or less
      A12-2 (BM1) - A12-1 (BM2) Always Below 1 Ω
      A12-4 (GND1) - A12-3 (GND2) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG
    OK
  8. CHECK HARNESS AND CONNECTOR (GND TERMINAL)


    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      A12-4 (GND1) - Body ground Always Below 1 Ω
      A12-3 (GND2) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG
    OK
  9. CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - BRAKE BOOSTER PUMP ASSEMBLY)


    1. Make sure that there is no looseness at the locking part and the connecting part of the connector.

      OK
      The connector is securely connected.
    2. Disconnect the A41 skid control ECU (brake booster with master cylinder assembly) connector.

    3. Check both the connector case and the terminals for deformation and corrosion.

      OK
      No deformation or corrosion.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      A41-1 (MRO1) - A12-2 (BM1) Always Below 1 Ω
      A41-1 (MRO1) or A12-2 (BM1) - Body ground Always 10 kΩ or higher
      A41-27 (MRO2) - A12-1 (BM2) Always Below 1 Ω
      A41-27 (MRO2) or A12-1 (BM2) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK
    NG