).
INSPECTION USING SIMPLIFIED TESTER |
| 1.Before starting this
inspection, remove the brake booster check valve from the
vehicle
and check its operation (Refer to ). |
 |
2.After checking, install
the check valve to the vacuum hose and connect it to the
vacuum
gauge. Connect the pressure gauge and pedal depression gauge
as shown in the figure. Bleed the
pressure gauge and then perform the following tests: (1) Airtightness test with no load Start the engine, and stop it when the vacuum gauge indicator has reached approximately -67 kPa. The result is judged as "Good" when the drop of the vacuum approximately 15 seconds after the engine was stopped is within -3.3 kPa. (2) Airtightness test with load Start the engine and depress the brake pedal with 200 N. Stop the engine when the vacuum gauge indicator reached approximately -67 kPa. The result is judged as "Good" when the drop of the vacuum approximately 15 seconds after the engine was stopped is within -3.3 kPa. When one or more of the above check results are judged as "No Good," the vacuum hose or brake booster is suspected faulty. (3) Brake booster characteristics test Perform this test after the above (1) and (2) were performed. .....1. Non-servo effect test With the engine stopped, make sure that the vacuum gauge reading is 0 kPa. Depress the brake pedal with 100 N and 300 N, and measure the fluid pressure generated. Standard value:
Start the engine. Depress the brake pedal with 100 N and 300 N when the vacuum gauge indicator reached approximately -67 kPa, and measure the fluid pressure generated. Standard value:
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