MasterCraft 2007
Troubleshooting
(Electronic Throttle Engines)
System Not Controlling/Surging in both RPM & Speed Mode
You can quickly perform a
“Control Test”
to confirm whether PerfectPass has proper control of
the ECM. This test is on Page 3 and can be done on a “fake lake” or in the water.
The
PerfectPass “Drive by Wire” (DBW)
system for new electronic throttle engines
results in a simplified and enhanced version of PerfectPass. From the drivers seat,
PerfectPass operation is virtually identical to the present mechanical systems.
PerfectPass is now comprised of just four main parts:
1. DBW Master Control Module
2. DBW Plug & Play Engine Wiring Harness
3. Plug & Play Display Harness
4. In-Dash
Display
5. ALDL
Plug
On 2007 MCX and RPT, an “ALDL” ground plug is
required. On the 2006 6.0L and 8.lL, a re-flash of the
ECM is required.
Engine Display
Harness Harness
How it Operates:
The ECM of an electronic throttle engine allows an external device such as PerfectPass
to control the engine rpm using the throttle servo motor when all control signals are valid
and manual throttle lever position exceeds the rpm level request of PerfectPass.
Just three individual wires in the PerfectPass DBW wiring harness connect the speed
control to the engine ECM.
1. The
Request Line
from PerfectPass requests the ECM to allow PerfectPass to take
control.
2. The
Status Line
from the ECM indicates PerfectPass now has control of the engine.
The Status Line is the signal that confirms engagement (beeper) and system control
and must be operational for system to engage & control properly.
3. The
VGOV Line
establishes the engine RPM level as set by PerfectPass.
Problems with PerfectPass should be rare given the few components that now make up
the system. Most troubleshooting will simply involve voltage/continuity testing on the
PerfectPass engine harness.
PerfectPass Control Systems (902) 468-2150
Page 1
