Precision Turbo and Engine BigStuff3 GEN3 Engine Torque Management (ETM) System User Manual
Page 4
o
MSD 7AL-2
o
MSD 6AL
o
MSD Mag44 points box.
Note: The ETM system, for BigStuff3’s GEN3 coil-on-plug systems (COP), does not
require the ETM module, since all the necessary ETM hardware is resident in the GEN3
ECU.
• The ETM Harness
Ground wire
“3-Step Enable” wire
Header connector goes
to GEN3 Header
marked ETM
2-way drive shaft
speed sensor
connector
DAE trigger wire
o
Connect the harness header connector into the GEN3 module header connector marked
“ETM”.
o
Connect the two-way connector labeled “Drive Shaft” to the drive shaft speed sensor (not
supplied with the system). See the “What else is Needed” section above for more details.
Install the 2 way Metri-Pack Packard connector PN 12103784 (w/terminals PN 12089188)
onto the driveshaft sensor and plug it into the ETM harness. If the TOSS trace is erratic
switch the wires!
o
Connect the “Ground” wire to the frame near the drive shaft speed sensor along with the
sensor ground.
o
Connect the DAE trigger Wire (from ECU header connector Hdr2 Y2) to a 12V switched
source.
There must be 12 Volts applied to this wire, for the 2 step and 3 step functions
to work!
o
Connect the 2 Step Enable wire (Hdr1 B2) to the footbrake and /or trans-brake depending
upon options. The 2-step and 3-step functions are independent of each other, except that
when the 3-step is engaged (12 Volts applied to the “3-step Enable” wire) the 3-step will
override the 2-step.
o
Connect the 3 Step Enable wire (Hdr 2 W1, TSS+) to the trans-brake switch. (If you have
this option). If you have the DAE option, the red turbo shaft speed wire in the DAE harness
(also Hdr 2 W1) is used for the 3-step enable function. 12 Volts must be applied to this
wire (via the trans brake, for example) for the 3 step to work.
Also, there must be 12 Volts
applied to the DAE trigger wire, for the 2 step and 3 step functions to work.
When 12
Volts is applied to the “3-step Enable” wire, the 3-step will override the 2-step.
o
Timer Enable wire - connect to a relay to invert the trans-brake signal (see wiring diagram
below). This wire must have12 Volts applied to it once the trans-brake is released to start
the timers in the ECU.
Rev
1.1
4