C1202

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM (for Hydraulic Brake Booster): C1202/52: Brake Fluid Level Low / Open Circuit in Brake Fluid Level Warning Switch Circuit
C1202/52 - Brake Fluid Level Low / Open Circuit in Brake Fluid Level Warning Switch Circuit

DESCRIPTION

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





WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
When C1241/41 is output together with C1202/52 or C1202/58, inspect and repair the trouble areas indicated by C1241/41 first.

PROCEDURE

1. CHECK BRAKE FLUID LEVEL

(a) Turn the ignition switch to OFF.

(b) Depress the brake pedal 20 times or more (until the pedal reaction feels light and pedal stroke becomes longer).

(c) Check the amount of fluid in the brake reservoir.

HINT
When the ignition switch is turned to the ON position, brake fluid is sent to the accumulator and the fluid level decreases by approximately 5 mm from the level when the ignition switch is off (normal).

NOTICE:
Do not move the wheels with the ignition switch off.

OK:

Brake fluid level is correct.

NG -- CHECK FOR LEAKAGE AND REPAIR
OK -- Continue to next step.

2. INSPECT BRAKE FLUID LEVEL WARNING SWITCH

(a) Disconnect the brake fluid level warning switch connector.





(b) Measure the resistance.

Standard Resistance:





(c) Reconnect the brake fluid level warning switch connector.

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

NG -- REPLACE BRAKE MASTER CYLINDER RESERVOIR SUB-ASSEMBLY
OK -- Continue to next step.

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

(a) Disconnect the skid control ECU connector.





(b) Disconnect the brake fluid level warning switch connector.

(c) Measure the resistance.

Standard Resistance:





(d) Reconnect the brake fluid level warning switch connector.

(e) Reconnect the skid control ECU connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. RECONFIRM DTC

(a) Clear the DTCs Vehicle Stability Control System (for Hydraulic Brake Booster).

(b) Check if the same DTCs are detected.





B -- END

A -- REPLACE MASTER CYLINDER SOLENOID