How to bleed ABS brake systems by gm tech2

Almost all modern vehicles have ABS system or anti-lock brake system on their cars and trucks. ABS brakes, like any other brakes which need regular maintenance including bleeding. Different vehicle models enjoys similar way of bleeding ABS systems are similar among different vehicles, but GM Tech2 scanner is specially designed for GM vehicle models.

The text below gives an instruction on how to bleed the ABS system with GM Tech 2 scan tool.

Tool:
GM Tech2 Scanner tool

GM TECH2 Features:

1) Authentic GM software in the Tech 2 Flash means the most comprehensive diagnostic software available for late model GM vehicles.
2) Support for on-board diagnostics on all GM systems 1992 thru current year.
3) Removable hardware modules provide insurance against scan tool obsolescence.
4) Large, easy-to-read backlit screen.
5) RS232 & RS485 ports provide the avenue to connect future devices to your Tech 2 Flash.
6) Ability to capture stored DTCs, Freeze Frame, and Failure Record for later review.
7) Ability to view the status of vehicle diagnostic tests as they run.
8) Bi-directional The authentic GM 1992-current year software will provide full bi-directional control when performing power train, chassis, and body diagnostics.

Follow the following instructions:

1) Raise your car into a properly support position
2) Disassemble all 4 tires and wheel assemblies
3) Check the brake system for leaks and visual damage. If the situation is damage or have to be get it done and how to use the device to make a possible position. Replace or repair as needed.
4) Check the battery state of charge (you may refer here )

5) Install GM Tech2 scan tool software. (Download related PDF manual on  fobdii.com webpage)
6) Turn the ignition to ON position with the engine OFF
7) Connect the GM Tech2 scanner into the OBD diagnostic socket
8) Select “Special Functions”>> “Automated Bleed”
9) Bleed the base brake system.
10) Follow the Tech2 scanner screen instructions until the desired brake pedal height is achieved.

NOTE:
If the bleed procedure fails, do as following:
If a DTC is detected, select “Diagnostic Trouble Code” to clear DTCs. If the brake pedal eels spongy, repeat the conventional brake bleed procedure again.

11) When the desired brake pedal height is achieved, press the brake pedal to check the firmness.
12) Unplug the GM Tech2 scanner from the OBD socket
13) Install the 4 tires and wheel assemblies
14) Check the brake fluid level and the firmness of pedal again

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