software v 6 00

36
Notes
55 Self Test
65 Set Engine Type
81 Output Display
82 Xducer Display
83 Defaults
91 PWM
92 RAW XDCR
93 PSI
94 POT Counts
95 Show Setpoints
96 PRESET
97 Custom Range
99 SET--ACT PSI
0=IDLE 1=INC
The
ff
ff
f
irst timeirst time
irst timeirst time
irst time that the governor is powered up on a vehicle, the Message Center will display ENG?
Use the INC and DEC switches to find the proper engine and then press PRESET to save.
For all engines except CAT, t he control signal is an analog voltage that is software controlled for minimum and
maximum output. There is a hardware minimum of 700 mV for idle and 4.2 V for maximum throttle .
If the signal is present and varies with the INC/DEC switches, it is functioning.
CAT uses a PWM signal. This is a 400 Hz square wave that varies from 12% to 87% duty cycle. It can be measured
as voltage. Range is 0.68 to 4.0 VDC.
A relay is incorporated that activates when the MODE switch is pressed if a 12 V input on terminal 2 of the 12 pin
connector. Common (30) at pin 11 and NO (87) at pin 12.
12 V at pin 2 allows Throttle Operation and 12 V at pins 2 and 10 allow Pressure Governing.
The transducer must have 5 VDC from the governor (B-6) at terminal B.
The transducer must have ground from the governor (B-5) at terminal A.
The transducer returns a variable voltage signal from terminal C to the governor (B-7).
Check for signal voltage and ground at the transducer with a meter between pins A and B
with the transducer unplugged.
It must bIt must b
It must bIt must b
It must b
e +5e +5
e +5e +5
e +5
.0 VDC.0 VDC
.0 VDC.0 VDC
.0 VDC
+- 0+- 0
+- 0+- 0
+- 0
.1 V.1 V
.1 V.1 V
.1 V . If the voltage and ground
are correct, plug the transducer in and check for PSI voltage at the governor (B-7). It must
range between 700 mV and 4.5 V and vary with pressure.
Engine selection is available from the keypad by entering 65:
IDLE INC INC IDLE IDLE INC IDLE INC
Engine types:
CAT using the CAT ID Input and CAT a 12%
Cummins = IS for ISX ISL ISB ISC ISM b 1.25
Navistar = NAV (All) c 0.7
Detroit Diesel Series 40 = S40 (Navistar) d 0.7
Detroit Diesel = DET (All DDEC) e 0.7
Mack (V-MAC III) f 0.7
Mercedes (MBE900) g 1.0
Custom Range h x.x
Caterpillar = CAT ID wire z 12%
Caterpillar = CAT (All) w/o ID wire Z 12%
Press PRESET to save selection.
To return the governor to default settings, enter 83:
INC IDLE IDLE IDLE IDLE IDLE INC INC (PRESET)
Self diagnostics are entered from the keypad by entering 55:
IDLE INC IDLE INC IDLE INC IDLE INC
Complete instructions are on page 18.