WebTech A says operation of ABS modulator valves can be checked during the initial cycle of the ignition switch. Tech B says modulator valves can be checked with an ohmmeter for … WebMay 31, 2010 · The range given for this is 0 to 255 with a default value of 128 (increasing number louder). I'm surprised that you needed to increase the chuff volume. The darn thing was too loud at the 128 setting. There is also a CV 133 called sound unit master volume (volume at startup; higher number is louder).

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WebMar 23, 2024 · Drivers may also catch on to trailer stability issues by listening to the “chuff test” the system runs at startup. When the tractor is keyed on, the air brake system runs through the process of firing the individual modulators to make sure they’re working – creating a series of clicks and “chuffs.” ... Webchuff: 1 v blow hard and loudly Synonyms: huff , puff Type of: blow exhale hard cumberland security bank phone number

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Webcontrol modulators will be energized during the Chuff test. It is recommended during the initial start up that the brakes be applied to audibly hear the modulators exhaust during … Webmodule and performing the End‑of‑Line (EOL) test, a circumstance in which the DTC will not allow you to complete the EOL test. This DTC is triggered during the EOL test when the ABS module performs a chuff test during the power on sequence. During the chuff … WebcWith the brakes applied**, verify the chuff test runs at power-up (vehicle cannot be moving). Listen for the sequence: right steer; left steer; right drive; left drive; right add’l; left add’l ... c If 21-8 alone, unplug the Steering Angle Sensor (SAS) connector harness and test with a replacement east tennessee real estate land