VEHICLE STABILITY CONTROL SYSTEM(for TMMF Made), Diagnostic DTC:C1202

DTC Code DTC Name
C1202 Master Reservoir Level Malfunction

DESCRIPTION

The brake fluid level warning switch sends the appropriate signal to the skid control ECU when the brake fluid level drops.

DTC No. DTC Detection Condition Trouble Area
C1202 Low fluid level condition in the brake master cylinder reservoir tank continues for 60 seconds.

  • Brake fluid level

  • Brake master cylinder reservoir sub-assembly (Brake fluid level warning switch)

  • Brake fluid level warning switch circuit

  • Skid control ECU (Brake actuator assembly)

WIRING DIAGRAM

B0046NAE01

CAUTION / NOTICE / HINT

Note

When replacing the brake actuator assembly, perform zero point calibration Click here.

PROCEDURE


  1. CHECK BRAKE FLUID LEVEL


    1. Turn the ignition switch off.

    2. Check the amount of fluid in the brake reservoir.

      OK
      Brake fluid level is correct.

    NG

    ADD BRAKE FLUID

    OK

  2. INSPECT BRAKE MASTER CYLINDER RESERVOIR SUB-ASSEMBLY (BRAKE FLUID LEVEL WARNING SWITCH)


    1. B0045D3E01
      Text in Illustration
      *a

      Component without harness connected

      (Brake Fluid Level Warning Switch)

      Remove the reservoir tank cap and strainer.

    2. Disconnect the brake fluid level warning switch connector.

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

      Tech Tips

      A float is placed inside the reservoir. Its position can be changed by increasing or decreasing the brake fluid level.

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      1 - 2 Float up (Switch OFF) 10 kΩ or higher
      Float down (Switch ON) Below 1 Ω

      Tech Tips

      If the result is as specified, adjust the brake fluid level to the MAX level after measuring the resistance.

      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE BRAKE MASTER CYLINDER RESERVOIR SUB-ASSEMBLY Click here

    C

    REPLACE BRAKE MASTER CYLINDER RESERVOIR SUB-ASSEMBLY Click here

    A

  3. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BRAKE FLUID LEVEL WARNING SWITCH)


    1. Disconnect the skid control ECU connector.

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

      Standard Resistance (for LHD with CVT, and RHD)
      Tester Connection Condition Specified Condition
      A78-7 (LVL2) - A77-1 (+) Always Below 1 Ω
      A77-2 (E) - Body ground Always Below 1 Ω
      A78-7 (LVL2) - Body ground Always 10 kΩ or higher
      Standard Resistance (for LHD except CVT)
      Tester Connection Condition Specified Condition
      A79-7 (LVL2) - A77-1 (+) Always Below 1 Ω
      A77-2 (E) - Body ground Always Below 1 Ω
      A79-7 (LVL2) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. RECONFIRM DTC


    1. Clear the DTC Click here.

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

      Result
      Result Proceed to
      DTC C1202 is not output A
      DTC C1202 is output (for LHD) B
      DTC C1202 is output (for RHD) C

    A

    CHECK FOR INTERMITTENT PROBLEMS Click here

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    C

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here