EFILive Duramax LBZ DSP5 User manual

Cindy Myers
Duramax LBZ/LMM DSP5
User Guide

EFILive, EFILive FlashScan and EFILive AutoCal are registered trademarks of EFILive Limited.
All other trademarks belong to their respective owners.
Duramax LBZ/LMM DSP5User Guide
© 1998 EFILive Limited
All rights reserved
First published
03 October, 2009
Revised
29 August 2018

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Contents
............................................................................................................2
Prerequisites....................................................................................................................2
Intended Audience.......................................................................................................2
Computer Knowledge...................................................................................................2
......................................................................................................3
Introduction......................................................................................................................3
Introduction ..................................................................................................................3
DSP2Support Retirement ............................................................................................3
Software.......................................................................................................................3
Overview ..................................................................................................................3
Requirements...........................................................................................................3
Additional Support Resources......................................................................................4
............................................................................................................5
DSP Upgrade ..................................................................................................................5
What is EFILive DSP5? ................................................................................................5
Upgrade the Operating System to DSP5......................................................................5
Wiring the DSP5Switch................................................................................................6
LBZ / LMM ECM Connector Wiring Installation............................................................8
Important DSP5Parameters and Tables......................................................................9
A9136, A9236, A9336, A9436 –DSP5switching voltages .......................................9
Monitoring DSP status in the Scantool.....................................................................9
LBZ / LMM –DSP5pin install guide...........................................................................10
Wiring the DSP2Switch..............................................................................................19

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Prerequisites
Intended Audience
EFILive Customers using the V8 Scan and Tune Tool software.
Computer Knowledge
It is expected that readers have a basic understanding of:
The Windows operating system;
Starting and using Windows applications;
Navigating folders using Windows Explorer.

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Introduction
Introduction
This document is intended to assist EFILive customers with the basic operations
and steps necessary to setup EFILive's DSP5custom operating systems for the
Duramax E35A and E35B ECMs.
DSP2Support Retirement
This document was originally created for DSP5 and DSP2 custom operating
systems. Support for DSP2 operating systems was retired in July 2018. DSP2
documentation remains for continuity, however EFILive no longer offers software
support for this feature.
Software
Overview
EFILive presently has two major software versions (V7 and V8) that implement
different parts of the tuning and scanning process. The V8 software is undergoing
significant development and will eventually supersede V7 entirely for FlashScan
V2 customers.
FlashScan customers must install both versions, the following table displays
software functionality.
Feature
V7
V8
Scanning
OBDII Diagnostics
Bidirectional Controls
Reading
Flashing
Tune Editing
VIN License Management
Firmware Management
Requirements
Duramax DSP5software enhancements are available in the following product
versions:
EFILive V8.1.2.75 or later.
FlashScan V2 / AutoCal Firmware - V2.06.16 or later.
EFILive V7.5.6.99.

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The latest software is available for download from the EFILive website here:
http://www.efilive.com/latest/cat/download-efilive
Additional Support Resources
If, after reviewing this guide, further assistance is required please contact the
EFILive Authorised Reseller from whom you purchased your product. They are
your first point of contact for EFILive support related inquiries.
If your question is in relation to the actual tuning of your vehicle (i.e. how to gain
performance, economy etc.) then please ask these questions on the EFILive
Forum (http://forum.efilive.com/). EFILive does not provide support or assistance
for the actual tuning of any supported vehicles.

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DSP Upgrade
What is EFILive DSP5?
EFILive DSP5(Duramax Switchable Performance) ECM (Engine Control Module)
operating systems are modified versions of the factory ECM operating systems
that give users the ability to use the factory ECM to perform functions beyond what
was offered from the factory.
EFILive DSP5custom operating systems for Duramax controllers allows customers
to be able to switch 'on the fly' between multiple tunes, all stored in the ECM's
flash memory.
LBZ / LMM DSP5can only available to be switched via a hardwired switch. Users
cannot switch tunes using FlashScan V2 or AutoCal like the LB7 / LLY DSP5
programs can.
The ECM can be returned to GM factory condition at any time by reflashing a
stock GM Operating System and calibration into the ECM using the Full Flash
option.
On the LMM ECM the CVN changes to the ECM's Operating System will be
logged by the ECM and be will visible by the TechII diagnostic tool.
Upgrade the Operating System to DSP5
Important: FlashScan V2 / AutoCal MUST be plugged in to the PC's USB port
prior to starting V7.5 for the DSP5operating system upgrade to be available.
Using the EFILive V7.5 Tuning Tool, open your tune file and click on the 'Upgrade
OS' tab.
Select which operating system upgrade you wish to apply (only choose one), then
click the “Apply Upgrade” button.

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Save the file with a new name, File > Save As. Maybe something like
‘My Truck Base DSP5 Conversion.ctz’
Close the tune file by selecting, File > Close Tuning File.
Reopen the file so EFILive will recognise the file is a DSP5converted operating
system. Please also take note of the new operating system (OS) number of the
DSP5converted file.
DSP2 will become 2xxxxxxx (eg 12606128 to 22606128)
DSP5 will become 5xxxxxxx (eg 12606128 to 52606128)
EFILive automatically populates the new DSP tables with factory maps during the
upgrade to get you started. On modified engines these may not be suitable
settings, you may need to copy your own tables in to the new DSP section(s).
Once you have made the necessary changes to your individual tunes, save the
modified tune file, and perform a Full Flash of the ECM using V8 Scan and Tune
software.
NOTE: DSP5tunes cannot be read out of the ECM once flashed in.
Wiring the DSP5Switch
The DSP5switch works by selecting different voltages for the ECM to measure,
from these voltages the ECM can determine which program you wish to run.
Below is the suggested resistance to be used for any DSP5switch you may wish
to design. Also shown is the approx. voltage the ECM will measure for each
resistance. The switching voltages are configurable within EFILive, however, the
values below give a good even separation of switch points.
The 0.1uF capacitor shown in red is optional, it is used to reduce switch bounce.

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The connections to the ECM from the switch are made to the following pins –
Signal = Connector 1 (the larger plug), pin 46, (next to Grey wire-LBZ, Tan wire-
LMM).
Ground = Connector 1 (the larger plug), pin 54, (next to Yellow/Black wire).
Note: It may also be possible to make the ground connection in the cab rather than the
ECM.
The part number for the connector pins is –Tray #19, 1928498135.

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LBZ / LMM ECM Connector Wiring Installation
#1 –Locate ECM Plug
#2 –Remove the Larger Plug
#3 –Remove purple locking clip
(don’t lose it!)
#4 –Remove top cover
#5 –Insert new pins/wires
Reverse procedures once done.
Pin-out Reference (viewed looking
at connector face).
Joe Harden has provided an in-depth install guide at the end of this document.

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Important DSP5Parameters and Tables
A9136, A9236, A9336, A9436 –DSP5switching voltages
These parameters set up the switching points for each DSP5program to become
enabled.
It works by the voltage from the switch for each tune needing to fall between each
adjacent parameter for a valid reading. So as an example only, if you set the
parameters like so –
A9136 (DSP Program #1) = 4.00V
A9236 (DSP Program #2) = 3.00V
A9336 (DSP Program #3) = 2.50V
A9436 (DSP Program #4) = 1.80V
For the non DSP Program (stock) to become enabled the switch voltage must be
above 4.01V.
For DSP Program #1 to become enabled the switch voltage must be between
4.00V and 3.01V.
For DSP Program #2 to become enabled the switch voltage must be between
3.00V and 2.51V.
For DSP Program #3 to become enabled the switch voltage must be between
2.50V and 1.81V.
For DSP Program #4 to become enabled the switch voltage must be between
0.00V and 1.80V.
Check with your DSP5switch provider for the correct settings.
Monitoring DSP status in the Scantool
You can monitor the DSP switch data using the following PID’s –
GM.E35DSP2_DMA (PC) or E35DSP2_M (BBL): This PID will show if the DSP2
tune is enabled.
GM.E35DSP5_DMA (PC) or E35DSP5_M (BBL): This PID will show the current
tune number the ECM is using for DSP5.
GM.E35DSP5V_DMA (PC) or E35DSP5V_M (BBL): This will show the measured
voltage at the ECM pin when using DSP5, useful for setting up the DSP5switching
voltages, otherwise just use the previous PID to monitor the DSP5program
switching.

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LBZ / LMM –DSP5pin install guide
Contributed by EFILive beta tester, Joe Harden
I’m not sure if it makes it easier for the install, but I removed the driver’s side inner
fender.
Use the “throttle cable” port through the firewall as a way to route the wire from the
switch to the ECM. (note that EGT and boost wires are already installed though
this port in the pictures)

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Press the grommet into the cab
This is an under-dash view of what’s taking place.

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Pop the rubber center out of the grommet. (It’s been a while since the egt / boost
install was done, but it seems like I had to make a cut into the rubber center in
order to remove it from the “throttle cable”. It already had a slit in it during this
install, but I don’t remember if I did it earlier or not.)
Now that the centre is out, the grommet can be pulled through the firewall (into the
engine bay) where it is easier to feed the wire through it. I had the pin soldered to
the wire, since I don’t have the proper crimping tool. The crimping tabs on the pin
need to be trimmed down and the solder can’t be very thick, since the whole pin
needs to fit down a hole about the size of the head of the pin.)

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The grommet can be installed back into the firewall after the wire is fed through.
Location of ECM

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At this point, the batteries need to be disconnected!
Locate the ratcheting lever on the lower connection of the ECM and pull upward
(toward the sky). As the lever rotates upward, the plug will back out of the ECM.
Assist the ratchet in backing out the connector. The ratchet will stop after about
90° of rotation from the starting position.
This connection is referred to as C2 of the ECM. (We’re interested in C1 above it,
but C2 needed to be removed in order to make C1 available.)
Now remove connector C1 (directly above C2). The same ratcheting lever is on
this connector as C2, except the lever needs to be pulled down (toward the
ground).

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Here’s C1 after being unplugged from the ECM.
There’s a pink clip in the connector that holds the pins in place. This needs to be
removed. I used a small allen-wrench to get down in the notch of the pink clip and
applied pressure to the end of the connector to remove it.

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Remove it completely from the connector.
Next, take the ratcheting mechanism / cover off the connector. First, pop up the
end nearest the wire bundle.

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The pin is to be inserted in location 46 (from this view with the wire bundle on the
right side of the connector, it’s the 3rd slot in from the beginning of the second row.
If confused, follow the red wire across the picture.)
Referring to this view, the pin needs to be oriented such that the wider side of the
head of the pin is closest to location 47 (grey wire).
It is a good idea to have a small piece of rigid wire (or a straightened out paper-
clip) near by to help push the pin into location.
Reinstall the pink clip and make sure everything is where it needs to be. If the clip
won’t slide completely through the connector, especially if it stops in the area of
the new pin, then check that the pin has been seated in the connector with the
rigid wire.
Once the pink clip is in place, press the sliding portion of the ratcheting
mechanism back into the connector and attach the ratchet lever / cover back onto
the connector (the lever is to be down in the “locked” position when this is carried
out.) Having the slide pushed in and the lever down properly position the gear and
slide.
C1 is now ready to be connected to the ECM, so pull the lever back to the fully
open position and insert the connector into the top port until you feel the slide
mechanism make contact with the ECM. Now begin pushing the lever up while
helping the ratchet feed the connector into the port.
C2 can now be reinstalled into the lower port. Having the lever in the full open
position, follow the same steps as C1, except the lever will be pulled toward the
ground while the connector is being guided into the port.
The batteries can now be reconnected and the inner fender can be reinstalled.
This install didn’t include a ground wire from the switch to the ECM. I currently
have the switch grounded to the metal support under the steering column, and it
works fine.