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Durametric Tutorial Part 2: Advanced Functions

Reviews Views Date of last review
1 20364 Sat July 1, 2017


Recommended By Average Price Average Rating
100% of reviewers None indicated 10.0


In Part 1, I covered some of the basic functions that can be performed using the Enthusiast version of the Durametric cable. In this tutorial, I will discuss some of the more advanced uses of the cable, including some Coding functions for those who purchase or borrow the Professional cable.

NOTE: Some some of these functions, particularly Activations and Coding could result in damage to your vehicle, as well as disabling some of the normal safety functions of your car. You undertake these procedures at your own risk!!

Bleeding the Secondary Brake Circuit (ABS)

Under normal circumstances, Porsche only recommend bleeding the primary circuit as described in the Service Manual below:

"1. Disengage and remove cover over brake fluid reservoir.
2. Open expansion tank.
3. Connect a bleeding device to the brake fluid reservoir. Switch on the bleeding device. Bleeding
pressure is approx. 2.0 bar.
4. Continue the bleeding procedure at the brake calipers. Do so in the following sequence: rear right/rear left/front right/front left. Bleed the outer bleeder valve first.
5. Use a transparent hose and a collecting bottle to check the escaping brake fluid is clean and free of air bubbles and to determine the amount of brake fluid used.
6. Open each bleeder valve until clear, bubble−free brake fluid emerges.
7. Tighten the bleeder valves to the stipulated tightening torque and remove the bleeder hoses.
8. Generate vacuum in brake booster by starting engine. Check brake−pedal travel and pedal feel.
Check the brake system for residual air by the amount of brake pedal travel. Repeat the bleeding procedure if necessary. Operate (pump) the brake pedal at the same time as described below. This will remove the remaining air bubbles from the primary circuit.

Open the rear right bleeder valves, then fully rapidly depress the brake pedal hard several times. Hold the brake pedal for 2 to 3 seconds after each depression, then release slowly. Continue bleeding until the brake fluid emerging into the collection bottle is free of bubbles and foam. Repeat this procedure in the sequence rear left/front right/front left.

9. If necessary, continue bleeding the secondary circuit (using the Piwis Tester). Only necessary if the hydraulic unit has been replaced and, after bleeding in the normal way (primary circuit), the brake pedal travel is excessive.

10. Remove bleeding device from brake fluid reservoir and screw cap on. The brake fluid level in the brake fluid reservoir must be between the MIN and MAX markings once the vehicle has been filled and bled. Adjust the brake fluid level if necessary."

As note above, bleeding the secondary circuit (i.e. ABS) with the PIWIS is only recommended if a large amount of air has been introduced into the system (e.g. by changing the master cylinder), or if a soft pedal remains after repeated bleeding of the primary circuit. Here is the procedure as described in the Service manual:

"Bleeding of the secondary circuit is only necessary if the hydraulic unit has been replaced and, after bleeding in the normal way (primary circuit), the brake pedal travel is excessive.
First bleed brakes as usual (primary circuit). Only then can you carry out bleeding of the secondary circuit with the Piwis Tester. The process is menu−driven. You must observe the specified sequence rear left, front left, front right, rear right.
To bleed the secondary circuit, the bleeding device remains connected to the brake fluid reservoir. Bleeding pressure is approx. 2.0 bar.
Throughout the entire bleeding process, the brake pedal must be operated cyclically (hold depressed for 2 to 3 seconds, then release slowly). After operating pedal for the last time, hold the brake pedal down and close bleeder valve."

The Durametric cable (either Enthusiast or Professional version) can be used in place of the PIWIS tester for this procedure. If you go to Activations under the PSM module, you will see the following screen:

Note the Brake Bleeding ABS pump activations near the end of the list. Also note that the sequence of activation is different than the normal sequence of bleeding the primary circuit. If you click on the little (?) or warning symbol, you will get the following additional information regarding this procedure:

Note: Having tried this myself, I can tell you that you really need another individual to help press on the brake pedal, and perhaps operate the program on the computer while you bleed the brakes.


Activations were formerly known as Drive Links in the older versions of Durametric. These allow you to remotely activate nearly any function or system in the car that is electronically controlled. You have already seen one example of its use in the brake bleeding procedure described above. Another example of some Activations available under for example, the Engine Module, is shown below:

There are Activations under nearly every module, and they help to diagnose problems by being able to isolate and/or test various functions. For example, I recently used the Activations to operate the windshield washer pump while I was watching from the front trunk, to see if it was leaking somewhere.
Again, while activating many of these functions (e.g. turning on and off lights) are fairly benign, there is the potential for damage or problems if you operate the wrong thing at the wrong time (e.g. while the engine is running) - unless you are very sure of what something does, don't do it.


Actual Values allows you monitor real-time parameters reported by the OBDII for diagnostic or data-logging purposes. There are Actual Values available under many of the modules; an example of what is available under the Engine Module is shown below:

An example of the output available is shown below; in this case I selected (checking the boxes on list) to monitor the Vehicle Speed (0 mph), Engine Temp, and Oil Temp (which happened to be the same since my car had been sitting for a while). The output can be in either graph or numerical form, and can be exported as well.


While the preceding functions are available on the Enthusiast cable, Coding is only available with the Professional cable from Durametric. Coding actually allows you to change the functions in many modules, at the programming level. I have displayed some of the more common applications in the screen caps below.

First of all, when you click on Coding under any Module that has it available (in this case under the Airbag Module), you will get a Warning disclaimer like below:

After clicking on the Proceed with Coding button, it will take you to the second tab, and following screen:

This screen gives you the option of saving your current configuration (for that module), or to Restore a previously saved configuration. I would strongly recommend saving an original configuration for each module you intend to make Coding changes in before proceeding further. Once you are ready to proceed with Coding, then select the Coding tab.


To disable your Thorax Airbags (e.g. with installation of racing seats) you will go into the Airbag module and disable (select "No", i.e. as not present) the relevant items:

Note: if you have an Airbag warning light (after removing or reinstalling your seats) you may still have to go back and clear the fault codes for that under module:


For example with installation of an aftermarket, fixed spoiler. It is under the Rear module. Note, if anyone can explain what the 3 "Spoiler Function Depends on . . . " refer to, I would appreciate knowing, since I couldn't figure out how to see the rest of those commands.


Under the Front Module:


Used to enable the key fob to open and close the windows when locking/unlocking the car:

Passenger Seat Weight Sensor (AWS)

Again, frequently disabled with the installation of track seats; this is found in both the Airbag module, as well as the Gateway module - I usually disable it in both modules.


Also for use when installing track seats with harnesses:

These are some of the more common coding functions for the enthusiast (with a Professional cable), and the only ones I have personally tried; proceed with other coding changes at your own risk!

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Keywords: Durametric cable


Porsche Chatter

Registered: October 2016
Location: Sweden
Posts: 16
Review Date: Sat July 1, 2017 Would you recommend the product? Yes | Price you paid?: None indicated | Rating: 10 
Pros: Good write down
Have you installed this Product or Mod?: Yes

Hi, got the "activation" of different functions working but trying to do the secondary ABS bleed I cant get it to work. It say a progress bar (or something along those lines) will appear/indicate progress but nothing happens when I press "Start" by the different wheels. Only same warnings as indicated above

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