PRE-RELEASE
Valve test
| Valve test |
| Explanation of valve tests |
| 1. |
Select the valve test for the respective wheel from the Activate menu.
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| 2. |
Spin the wheel by hand. It should spin freely. Answer YES and the inlet valve will be closed. The passage between the master cylinder and wheel cylinder is closed.
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| 3. |
The inlet valve is closed. The valve has moved to the HOLDING PRESSURE position. The passage is closed and no brake pressure to the wheels is obtained.
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| 4. |
The wheel should spin freely. Answer YES and the inlet valve and passage should open. Brake pressure can be applied to the wheel.
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| 5. |
The wheel should be locked. Answer YES and the outlet valve opens and the return pump starts running. Brake-fluid pressure is returned from the wheel cylinder by means of the pump.
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| 6. |
The wheel should spin freely.
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| 7. |
The last message on the display indicates that the test has been completed.
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| 8. |
If a fault occurs while the test is in progress, or if you answer NO to any of the questions, the following message will be displayed: “Valve test faulty, see Service Manual, Brakes (TC/ABS 5.3)”.
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