Checking the Hydraulic Unit TCS Operation

CHECKING THE HYDRAULIC UNIT TCS OPERATION

Checking The Hydraulic Unit TCS Operation By Pressure Gauge
1) Lift-up vehicle and remove wheels.
2) Disconnect the air bleeder screws from the FL and FR caliper bodies.





3) Connect two pressure gauges to the FL and FR caliper bodies.

CAUTION:
- Pressure gauges used exclusively for brake fluid must be used.
- Do not employ pressure gauge previously used for transmission since the piston seal is expanded which may lead to malfunction of the brake.

NOTE: Wrap sealing tape around the pressure gauge.

4) Bleed air from the pressure gauges.
5) Perform sequence control.
6) When the hydraulic unit begins to work, and first the FL side performs compression, holding, and decompression, and then the FR side performs compression, holding, and decompression.
7) Read values indicated on the pressure gauge and check if the fluctuation of the values between compression and decompression meets the standard values. Also check if any irregular brake pedal tightness is felt.





8) After checking, remove the pressure gauges from the caliper bodies.
9) Connect the air bleeder screws to the FL and FR caliper bodies.
10) Bleed air from brake line.

Checking The Hydraulic Unit TCS Operation With Brake Tester
1) Prepare for operating TCS sequence control.





2) Set the front wheels on the brake tester and set the select lever's position at "neutral".
3) Operate the brake tester.
4) Perform sequence control.
5) Hydraulic unit begins to work; and check the following working sequence.
The front left wheel performs compression, holding, and decompression in sequence, and subsequently the front right wheel repeats the cycle.





6) Read values indicated on the brake tester and check if the fluctuation of values, when decompressed and compressed, meet the standard values.