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you to read the speed signal from an ECU if you are installing the system in a vehicle equipped
with the OBDII port or a drivetrain from a newer vehicle; most 1996 and newer vehicles have
this.
Note: If you are using a Dakota Digital pulse generator or feeding an ECU signal into the
SPEED INPUT - SIG terminal, this is considered a SENSOR signal.
Selecting the GPS input type, the GPS receiver in the Control Box will gather the location data
from the satellites detected, and use this to display the vehicle speed. For weather, road and
driving conditions where the satellite signal quality may be compromised, the GRFX system
has a built-in accelerometer which is constantly being monitored to make any necessary
stability corrections.
Note: A GPS signal must be detected in order to use this INPUT mode.
The options under this INPUT menu are: SIGNAL, PULLUP, and BACK.
SIGNAL: which has the following sub-menu items:
SENSOR:
BIM:
GPS:
BACK:
PULLUP which changes whether the resistive pullup is ON or OFF at the SPEED INPUT – SIG
terminal. This should always be left ON unless directed by a technician to turn it OFF for
special situations.
BACK exits the INPUT menu and returns to the SPEED menu.
OUTPUT (Speed Output)
This option will be grayed out if SPEED-INPUT is set to BIM or GPS.
If a speed signal is needed for an ECM or cruise control, the SPD out terminal on the Control
Box can be used. This terminal can supply a 2,000 ppm (2K PPM) or 4,000 ppm (4K PPM)
signal that is created from the SIG terminal – speed input signal.
BACK (exit SPEED setup sub-menu)
TACH (Tachometer setup)
The Control Box can be set to read from 1-16 cylinder ignition signals. It can also be set to read
either 12 volt or 5 volt tach signals found on some engine computers. The digital tachometer
update rate can be adjusted between slow, mid, and fast. The RPM warning/shift point can be
adjusted from 2,200 – 14,800. The digital tachometer will read from 300 – 17,500 RPM.
You can also read the tach signal with the use of a bus interface module (BIM). Dakota Digital
offers a BIM-01-X that will allow you to read the tachometer signal from an ECU if you are
installing the system in a vehicle equipped with the OBDII port or a drivetrain from a newer
vehicle, most 1996 and newer vehicles have this.
• Turn on ignition
• Tap Control Knob to enter MAIN MENU, rotate knob to highlight SETUP, tap to select
• Rotate Control Knob to TACH, tap to select
• A sub-menu list: INPUT, UPDATE RATE, SHIFT LIGHT, and BACK
• Rotate the knob to the desired sub-menu, tap to select
INPUT (Tachometer input setup)
This menu is used to set the tachometer input type. You can connect a wire from the ignition
system or ECM or obtain RPM data from a BIM-01-X. Selecting INPUT will bring up the sub-
menu: CYLINDER, TYPE, and BACK
speed signal wired into the SPEED INPUT – SIG terminal
speed data provided through the BIM connector by a BIM-01-X
speed data from the GRFX's internal GPS satellite receiver
returns to the INPUT selection sub-menu
40
MAN# 650814
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