C1202/68

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 if the fluid level returns to normal and the other DTCs are not input.

DTC No.	INF Code	DTC Detecting Condition	Trouble Area
C1202/68	511	Pump motor operates for specified period when reservoir level drops. Brake operation signal is input when the reservoir level is abnormal and the ignition switch is on.	Brake fluid level Brake fluid level warning switch Wire harness or connector Skid control ECU
C1202/68	512	Pump motor operates for specified period when reservoir level drops. Brake operation signal is input when the reservoir level is abnormal and the ignition switch is on.	Brake fluid level warning switch Wire harness or connector Skid control ECU

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

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

HINT:

Before releasing the parking brake, set the chocks to hold the vehicle for safety.

1. CHECK BRAKE FLUID LEVEL IN RESERVOIR

1. Check that the brake fluid level is sufficient.

   HINT:

   1. If the fluid level drops, check for a fluid leak, and repair if found.
      
   2. If no leaks exist, add and adjust fluid and then check that the trouble code is not output again.
      

   OK:

   Brake fluid level is proper.
   

NG	ADD BRAKE FLUID

OK

2. INSPECT BRAKE FLUID LEVEL WARNING SWITCH

1. 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.

   Resistance:

   Tester Connection	Fluid Level	Specified Condition
   (B1-1) - (B1-2)	Proper	1.84 to 2.16 kΩ
   (B1-1) - (B1-2)	Below min.: level	Below 1 Ω

NG	REPLACE BRAKE MASTER CYLINDER RESERVOIR ASSEMBLY

OK

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

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

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

   Resistance:

   Tester Connection	Specified Condition
   S38-6 (LBL) - (B1-2)	Below 1 Ω

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

   Resistance:

   Tester Connection	Specified Condition
   S38-6 (LBL) - Body ground	10 kΩ or higher

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4. RECONFIRM DTC

1. Clear the DTCs (Click here).

2. Turn the ignition switch on.

3. Check the same DTCs are recorded (Click here).
   

   Result:

   Condition	Proceed To
   DTC is output	A
   DTC is not output	B

   HINT:

   This DTC may be memorized due to a malfunction in the connector terminal connection, etc.

B	END

A
REPLACE SKID CONTROL ECU