This instruction show you guide on how to use JPRO Diagnostics software to do modulator valve (Chuff) test for all Wabco pnenmatic braking systems and Bendix EC-60 and EC-80 braking systems.
This test assists in verifying correct brake modulator operation by activating the selected modulator for a short time.Ensure the vehicle is at normal operating air pressure while running the test.
1 Select the Modulator Valve (Chuff) Test and press Enter or the Start button.
2 The test dialog will be displayed.
NOTE: The modulator valves displayed is dependent on the ABS system ECU and the number of physical brake modulator valves installed on the vehicle.
3 If desired, select a delay start time. This allows you to leave the computer and get closer to the modulator valve, so you can better hear the actuations.
4 Select the modulator to test. You should hear a clicking or chuffing sound indicating successful actuation. While the test is running the selected button will have a green background and all other modulator buttons will be disabled. The Test Status window will update to indicate progress. Click the selected button again to stop the test early. Noregon JPRO DLA+ 2.0 Adapter Kit
5 Selecting the Chuff Test button will activate all modulators in the order indicated. The application will actuate each valve in sequence. You should hear a clicking or chuffing sound indicating a successful actuation. The Test Status window will update to indicate progress.
6 The braking system will reset after each modulator test ends which can be observed by audible clicking from the brake modulator valves.
7 When done, press the Exit button to return to the test selection dialog.
More topics about JPRO Diagnostic,please refer to:JPRO Diagnostics Guide