DTC    C1202/68    Master Reservoir Level Malfunction

for Preparation Click here


DESCRIPTION

When a fluid level drop in the master cylinder reservoir is detected, the signal is input to the skid control ECU.
When the DTC for the fluid level drop is memorized, the warning is canceled and the DTC is not stored if the fluid level returns to normal.

DTC No.
INF Code
DTC Detection Condition
Trouble Area
C1202/68
-
The fluid level in the reservoir continues to drop when the pump motor is activated while braking..
  1. Brake fluid level
  2. Brake fluid level warning switch
  3. Brake fluid level warning switch circuit
  4. Skid control ECU
↑
512
An open in the switch signal circuit continues for 2 seconds or more.
  1. Brake fluid level warning switch
  2. Brake fluid level warning switch circuit
  3. Skid control ECU

WIRING DIAGRAM


C109401E01


INSPECTION PROCEDURE

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

1.CHECK BRAKE FLUID LEVEL IN RESERVOIR

  1. Check that the brake fluid level is sufficient.

    HINT:
    1. When releasing the parking brake, set the chocks to hold the vehicle for safety.
    2. If the fluid level drops, check for a fluid leak, and repair if found.
    3. If no leak exist, add and adjust fluid and then check that the trouble code is not output again.

    OK:
    Brake fluid level is proper.



NG
CHECK AND REPAIR BRAKE FLUID LEAKAGE AND ADD FLUID
OK


2.INSPECT BRAKE FLUID LEVEL WARNING SWITCH


    C106612E01

  1. Disconnect the brake fluid level warning switch connector.

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

    HINT:
    A float is placed inside the reservoir. Its position can be changed by increasing/decreasing the level of brake fluid.

    Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1 - 2
    		Float up (Switch OFF)
    		2 +- 0.16 kΩ
    1 - 2
    		Float down (Switch ON)
    		Below 1 Ω

    HINT:
    If there is no problem after finishing the above check, adjust the brake fluid level to the MAX level.



NG
REPLACE BRAKE MASTER CYLINDER RESERVOIR ASSEMBLY
OK


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


    C110687E02

  1. Disconnect the skid control ECU connector and brake fluid level warning switch connector.

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

    Resistance:
    Tester Connection
    		Specified Condition
    A15-11 (LBL) - A23-2 (LBL)
    		Below 1 Ω
    A15-11 (LBL) - Body ground
    		10 kΩ or higher
    A23-1 (GND) - Body ground
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.INSPECT SKID CONTROL ECU (SWITCH INPUT VOLTAGE)


    C110922E02

  1. Reconnect the skid control ECU connector.

  1. Disconnect the brake fluid level warning switch connector.

  1. Turn the engine switch on (IG).

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

    Voltage:
    Tester Connection
    		Specified Condition
    A23-2 - Body ground
    		8 to 14 V



NG
REPLACE SKID CONTROL ECU
OK


5.RECONFIRM DTC

  1. Clear the DTCs (Click here).

  1. Turn the engine switch on (IG).

  1. Check if the same DTC is recorded (Click here).

    HINT:
    Reinstall the sensors, connectors, etc. and restore the vehicle to its prior condition before rechecking for DTCs.


    Result:

    Condition
    		Proceed To
    DTC (C1202/68) is output
    		A
    DTC (C1202/68) is not output
    		B

    HINT:
    If troubleshooting has been carried out according to the PROBLEM SYMPTOMS TABLE, refer back to the table and proceed to the next step (Click here).



B
END
A

REPLACE SKID CONTROL ECU