If so, what was the steps for the automated brake bleed procedure??

I got a TekPro and can cycle the ABS solenoids but there is no real routine built into the software.

My D2 brakes sucked when I got the truck. I recently went through a "mild" refresh over the summer. Replaced all lines with Crown Perf. SS lines, pressure bleed (3x) and they were felt the same. On the soft side, firming up once pumped once. Master cylinder went a week ago. Replaced this morning, pressure bleed again, went through each wheel twice....brake feels the same....while I can not find the receipts that came with the truck I could have sworn the ABS module was replaced. I'm thinking I should cycle the ABS and bleed again.

If anything the snow is coming - I can go "trip" the ABS a couple times then bleed.

I remember using a Tech2 on my old F-body and the automated bleed procedure was slick and made a world of difference.

Thanks in advance for any help.

Jon

 

You have bleed the master side the manual way.?
all the automatic bleeding in the world wont do any good unless the master to ABS has been bleed properly.

 

I certainly agree with you. By manual way I'm assuming you mean the ole' hold the pedal and crack the line at top of abs unit, correct?

My question is more on what the T4 does to the ABS unit during the automated bleed procedure?? i.e. Pressurize brake circuit to 15psi, cycle pump for 20 seconds on each channel, cycle solenoid, and then indicate what wheel to crack open at the caliper - like the GM procedure for Bosch 4 channel units. It makes for a solid ABS module bleed.

 

Found this from Wabco documentation:

Manual Bleed Procedure with Electronic
Control Equipment
NOTE: The electronic control equipment must be
capable of actuating (energizing) the outlet
solenoid valves for each wheel for approximately
10 seconds and activating the pump of the
modulator. The inlet solenoid valve should be
open (de-energized). The Meritor WABCO
Diagnostic Controller can be used to do this.
1. Apply the parking brake and chock the tires.
Turn the ignition OFF.
NOTE: The ignition must remain off for the
initial bleed procedure; energizing the unit
during bleeding must be impossible.
2. Perform brake bleed procedure for wet
module, bleeding the circuit and master
cylinder if required prior to connecting
electronic control equipment. Use Pressure
Bleed Method if equipment is available; if not,
use the Manual Bleed Method.
3. Install electronic control equipment to ECU, or
to the modulator assembly and pump.
4. Turn ignition switch ON or power electronic
control equipment.
5. Push on brake pedal with maximum force (firm
pedal) and hold.
6. Activate the pulse function on the electronic
control equipment starting with the longest
brake circuit, typically the rear.
7. Release brake pedal for 5 seconds and activate
the pump of the modulator for approximately
5 seconds.
8. Repeat Steps 5 through 7 three additional
times.
9. Perform manual bleed on appropriate wheels.
NOTE: To perform a manual bleed, follow
Steps 2 through 8 under “Manual Bleed
Procedure (Wet Modulator Assembly)” on
page 14.
10. Repeat Steps 5 through 9 for the remaining 2
brake actuators.
NOTE: If a firm brake pedal resistance is felt and
the brake pedal pushes back when the solenoids
and pump are simultaneously actuated for each
brake circuit, the system bleed procedure is
complete. If there is no firm pedal resistance,
repeat the bleed procedure and/or look into brake
system defect, (leaks, etc.).