C1202

BRAKE CONTROL: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: C1202/68: Master Reservoir Level Malfunction
C1202/68 - Master Reservoir Level Malfunction

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.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
When replacing the skid control ECU, perform initialization of linear solenoid valve and calibration Initialization.

PROCEDURE

1. CHECK BRAKE FLUID LEVEL IN RESERVOIR

(a) Check that the brake fluid level is sufficient.

HINT
- When releasing the parking brake, set the chocks to hold the vehicle for safety.
- If the fluid level drops, check for a fluid leak, and repair if found.
- If no leak exists, 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 -- Continue to next step.

2. INSPECT BRAKE FLUID LEVEL WARNING SWITCH

(a) Disconnect the 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.

Standard resistance:





HINT
If there is no problem after finishing the above check, adjust the brake fluid level to the MAX level with the power switch ON (IG).

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

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

(a) Disconnect the A15 ECU connector.





(b) Disconnect the A22 switch connector.

(c) 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. CHECK SKID CONTROL ECU (SWITCH INPUT VOLTAGE)

(a) Reconnect the A15 ECU connector.





(b) Disconnect the A22 switch connector.

(c) Turn the power switch ON (IG).

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

Standard voltage:





NG -- REPLACE SKID CONTROL ECU Removal
OK -- Continue to next step.

5. RECONFIRM DTC

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

(b) Turn the power switch ON (IG).

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

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

Result





HINT
If troubleshooting has been carried out according to the "PROBLEM SYMPTOMS TABLE", refer back to the table and proceed to the next step Problem Symptoms Table.

B -- END

A -- REPLACE SKID CONTROL ECU Removal