ELECTRONICALLY CONTROLLED BRAKE SYSTEM, Diagnostic DTC:C1319/35

DTC Code DTC Name
C1319/35 SCSS Changeover Solenoid Malfunction

DESCRIPTION

The stroke simulator solenoid generates pedal reactive effort during electronically controlled brake system control. If one of the four wheels loses brake accumulator function, the simulator operation is prohibited.

DTC Code INF Code DTC Detection Condition Trouble Area
C1319/35 71

Either of the following is detected:


  1. SS drive circuit is malfunctioning for 0.05 seconds or more.

  2. Short to +B in SS.

  • Brake stroke simulator cylinder

  • Brake stroke simulator cylinder circuit

  • Skid control ECU
↑ 72 Current leaks for 0.05 seconds or more when SS is off. ↑
↑ 73 Open circuit in SS continues for 0.05 seconds or more. ↑
↑ 74 Overcurrent in SS continues for 0.05 seconds or more. ↑

WIRING DIAGRAM

A01NGOBE03

INSPECTION PROCEDURE

Note

When replacing the skid control ECU, perform initialization and calibration of the linear solenoid valve Click here.

PROCEDURE


  1. INSPECT BRAKE STROKE SIMULATOR CYLINDER


    1. A01NHSIE02
      Text in Illustration
      *1

      Component without harness connected

      (Brake Stroke Simulator Cylinder)

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

    2. Disconnect the brake stroke simulator cylinder connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (BSR) - 2 (SCSS) Always 21.45 to 23.15 Ω
      1 (BSR) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE BRAKE STROKE SIMULATOR CYLINDER Click here

    C

    REPLACE BRAKE STROKE SIMULATOR CYLINDER Click here

    A

  2. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BRAKE STROKE SIMULATOR CYLINDER)


    1. A01NHDOE03
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Skid Control ECU)
      *2

      Front view of wire harness connector

      (to Brake Stroke Simulator Cylinder)

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

    2. Disconnect the skid control ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A89-5 (SS) - A87-2 (SCSS) Always Below 1 Ω
      A89-5 (SS) - Body ground Always 10 kΩ or higher
      A89-2 (BS03) - A87-1 (BSR) Always Below 1 Ω
      A89-2 (BS03) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT SKID CONTROL ECU (SOLENOID OUTPUT)


    1. A01NDO9E28
      Text in Illustration
      *1

      Component with harness connected

      (Skid Control ECU)

      Reconnect the skid control ECU connector and the brake stroke simulator cylinder connector.

    2. Turn the power switch on (IG).

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      A89-5 (SS) - Body ground Brake pedal depressed approximately 1.5 seconds after power switch on (IG) Below 1.5 V

    NG

    REPLACE SKID CONTROL ECU Click here

    OK

  4. RECONFIRM DTC


    1. Turn the power switch off.

    2. Clear the DTCs Click here.

    3. Turn the power switch on (READY).

    4. Check if the same DTC is recorded Click here.

      Result
      Result Proceed to
      DTC (C1319/35) is not output A
      DTC (C1319/35) is output B

    B

    REPLACE SKID CONTROL ECU Click here

    A

    CHECK FOR INTERMITTENT PROBLEMS Click here