C1202

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: C1202/58: Brake Fluid Level Low / Open Circuit in Brake Fluid Level Warning Switch Circuit
C1202/58 - 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

NOTICE:
When replacing the master cylinder solenoid, perform zero point calibration Programming and Relearning.

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

PROCEDURE

1. CHECK BRAKE FLUID LEVEL

(a) Turn the engine switch 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 engine switch is turned on (IG), brake fluid is sent to the accumulator and the fluid level decreases by approximately 10 mm (0.394 in.) from the level when the engine switch is off (normal).

OK:

Brake fluid level is normal.

NG -- CHECK AND REPAIR BRAKE FLUID LEAKAGE Description and Operation
OK -- Continue to next step.

2. INSPECT BRAKE FLUID LEVEL WARNING SWITCH

(a) Disconnect the A26 brake fluid level warning switch connector.





(b) 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.
- The warning switch is switched on/off at +/-5 mm (+/-0.197 in.) from the MIN level.

Standard Resistance:





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 SUB-ASSEMBLY
OK -- Continue to next step.

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

(a) Disconnect the A24 skid control ECU connector and A26 brake fluid level warning switch connector.





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

Standard Resistance:





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

4. RECONFIRM DTC

(a) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.

(b) Drive the vehicle at a speed of approximately 32 km/h (20 mph) or more for 60 seconds or more.

(c) Check if the same DTC is output Reading and Clearing Diagnostic Trouble Codes.

HINT
Reinstall the sensors, connectors, etc. and restore the previous vehicle conditions before rechecking for DTCs.

Result





B -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

A -- REPLACE MASTER CYLINDER SOLENOID