1
Item
Page
CONTENTS
1
SAFETY INSTRUCTIONS
3
OPERATION
System Overview
System Schematic Diagram
Component installation layout
4
4
5
INSTALLATION
Fuel Solenoid Valve
Wiring the Fuel Solenoid Valve
6
8
ELECTRONIC CONTROL UNIT (ECU)
The Printed Circuit Board (PCB)
Understanding the ECU
Wiring the ECU to on Electronic Tachograph or Speedo
Wiring the ECU to a Gearbox Sensor or Transducer
9
9
10
11
11
SPEED INDICATOR UNIT
13
WIRING DIAGRAMS
Speedo or Tacho Wiring Diagram
Mechanical Gearbox Sensor Wiring Diagram
14
15
TACHOGRAPH SPEED CONTROL CONNECTIONS
16
TEST AND CALIBRATION UNIT TCU3
Understanding the TCU
17
18
CALIBRATION
Calibrating the Frequency/Pulses if the Vehicle is fitted with
An Electronic Tachograph
Calibrating the ECU
Calibrating the ECU Using the K Factor
Rood Testing
Checking the ECU
Re-calibrating the ECU with the TCU
19
19
20
20
21
21
SEALING THE SPEED CONTROL SYSTEM
AFTER INSTALLATION
General Guidelines
Sealing the Fuel Solenoid Valve
Sealing the ECU
22
22
22
System 80 Rood Speed Control - Petrol
RM4003 B Issue 2
CONTENTS
2
CONTENTS
Continued
FAULT FINDING PROCEDURES
If the Vehicle Will Not Start or is Under Powered
If the Speed Control System Does Not Work
23
23
OPTIONS
Alternative Fuel Solenoid Valve 13/2 Way)
24
TECHNICAL DATA
25
PARTS LIST
Sensor Applications
26
27
System 80 Rood Speed Control - Petrol
RM4003 B Issue 2
3
Safety must always be thought of when working on a vehicle. The
potential risks should be considered and suitable precautions token.
It is important that personnel working on the vehicles are familiar with
operating instructions and workshop procedures.
The following points are general guidelines only and not intended to be
all inclusive:
1. Never work under a vehicle supported solely by jocks. Always
use chassis stands and make sure that they are resting on a
firm, flat surface.
2. Always use wheel locks to prevent the vehicle rolling if the
brakes have to be released.
3. The vehicle should always be left out of gear.
4. It is advisable to always disconnect the vehicle batteries as
these acts as a precaution against inadvertent starting and
reduces the risk of electrical fires. It also prevents accidental
flattening of the batteries.
5. Air Bags (Supplementary Restraint System - SRS) many of the
models covered by this manual are fitted with air bags as
standard equipment. When working on a vehicle fitted with
such a system, extreme caution must be token to avoid
accidental firing of the air bag, which could result in personal
injury.
Unauthorized repairs to the system could render it inoperative,
or cause it to inflate accidentally.
NEVER attempt to test the system using a test lamp.
NEVER tamper with or disconnect the air bag wiring harness.
NEVER make extra connections to any part of the system wiring
harness or terminals.
ALWAYS ensure that the air bag wiring harness has not been
trapped or damaged in any way when working on adjacent
components or systems.
6. We recommend that all electrical work is undertaken using a
high impedance multi-meter that includes a 0-2Ov voltage
scale and a low (0-200) and a high 10-20k) range OHM scale
for measuring voltage and resistance of the systems
components.
Above all do not jeopardize your own safety or the operational
safety of the vehicle.
Any additional holes required to mount equipment on the chassis
frame must be drilled in accordance with the individual
manufacturers instructions.
System 80 Rood Speed Control - Petrol
RM4003 B Issue 2
SAFETY
INSTRUCTIONS
4
SYSTEM OVERVIEW
An Electronic Control Unit IECUI mounted in the driving compartment
receives a speed signal from either the mechanical speedometer
sensor or mechanical gearbox sensor, depending upon the vehicle.
The ECU monitors this speed signal until the vehicle reaches the
calibrated speed. The ECU sends a signal to the Fuel Solenoid Valve
inserted into the vehicle's fuel line, controlling the fuel Row to the
injection system/carburetor. A5 the calibrated speed Is reached, the
valve closes, limiting the fuel, thus maintaining the vehicle at a
controlled speed. A schematic diagram is shown below. A
component Installation diagram Is shown on page 6.
SYSTEM SCHEMATIC DIAGRAM
System 80 Rood Speed Control - Petrol
RM4003 B Issue 2
OPERATION
5
COMPONENT INSTALLATION DIAGRAM
System 80 Rood Speed Control - Petrol
RM4003 B Issue 2
6
FUEL SOLENOID VALVE
INSTALLATION
The Fuel Solenoid Valve is inserted into the main fuel pipe between the fuel filter
and the injection system/carburetor, restricting the flow of fuel, thus controlling
the vehicles speed. Initially, it is necessary to locate the correct pipe into which
the valve is to be inserted. If you have a vehicle workshop manual it should
indicate which pipe is the inlet to the injection system/carburetor and which is
the return. If not, find the fuel filter and follow the pipe to the injection
system/carburetor. IF this is difficult, it is possible to disconnect the fuel pipes and
turn over the engine. One pipe should supply fuel, indicating it to be the inlet to
the injection system/carburetor.
Caution should be taken when attempting this as the fuel is extremely
Volatile and can spontaneously
ignite. If still in doubt, contact your
local dealer. The maximum
operating temperature of the valve
is 90.c. Therefore; it may be
necessary to extend the pipe work
away from the engine to a cooler
location before the valve is fitted.
Once you have located the pipe it
is necessary to measure its outside
diameter to ensure that you have
the correct fittings to install the
valve. The fittings supplied are for
8mm 0/ d pipe. If the pipe is bigger
or smaller, adapters can be
supplied. IF the pipe is plastic and
you have the correct fittings, cut it in
an accessible position where it will
be possible to clip up the valve
securely or even mount it on a
bracket. Next, slide over the pipe,
the nut and olive with the toper on
the olive facing away from the nut.
If on insert is available to suit the
internal diameter or the pipe this
should also be used. We
recommend that the nut and olive
are tightened up onto a Romatic
make-up tool first to ensure that the
Olive crimps up correctly to
guarantee a good connection onto
the valve.
If the fuel pipe is metal, we recommend that the pipe is cut with a proper metal
pipe cutter rather than a hacksaw. This is to prevent swarf entering the fuel
pipe, and eventually damaging either the fuel pump or fuel solenoid valve. If
the pipe is a rubber hose we normally find that the internal diameter of the hose
is 7mm or ammo Therefore, we force a short length of 8mm tubing into the hose
and clomp the hose with either a jubilee clip or a hose clamp. If a jubilee clip is
used, cover the screw with sealing paint to prevent disconnection.
System 80 Rood Speed Control - Petrol
RM4003 B Issue 2
7
Once the pipe fittings are completed, it is necessary to couple them
to the fuel solenoid valve. The valve is piped as follows with on arrow
indicating the direction of Row.
FUEL SOLENOID VALVE
System 80 Rood Speed Control - Petrol
RM4003 B Issue 2
8
WIRING THE FUEL SOLENOID VALVE



Remove the electrical connector block from the valve. Pass one end of
the twin core supplied through the shroud and connect into terminals 1
and 2 of the connector block.
Re-connect the electrical plug onto the valve ensuring the shroud faces
the floor to ensure that water cannot enter the shroud and short out
your valve electrical connections. Also, tighten the gland nut at the
base of the shroud to increase its resistance to water and dust.
The rest of the twin core can now be run into the driving compartment.
When running the wire ensure that it does not run over any hot or
moving parts including sharp edges. Use rubber grommets to pass it
through the bulkhead, then secure with coble lies.
System 80 Rood Speed Control - Petrol
RM4003 B Issue 2
9
ELECTRONIC
CONTROL
UNIT (ECU)
The Electronic Control Unit is a black, high impact, molded A.B.S.
box, housing the printed circuit board (PCB). The ECU controls the
vehicles speed via a Fuel Solenoid Valve. The ECU begins to
monitor as soon as the vehicle's ignition is switched on. The wiring
enters the box through three gland nuts located in its side. The
PCB is fastened to the underside of the lid and is accessed by
removing the four screws in the corners of the box.
System 80 Rood Speed Control - Petrol
RM4003 B Issue 2
10
UNDERSTANDING THE ECU
VR1 CAL
This potentiometer calibrates the speed at which the speed control is
set. By turning the potentiometer screw anti-clockwise you can lower
the speed of the vehicle or by turning it clockwise you can increase the
vehicle speed until your desired speed is reached.
THE GREEN LAMP OR LED (LIGHT EMITTING DIODE)
The green LED illuminates when power is fed to the ECU. If the LED does
not light this means that there is no power or that the fuse In the ECU has
blown.
THE RED LAMP OR LED
The red LED Illuminates when power is taken away from the fuel valve
causing it to close.
FUSE
The ECU has a 1 amp protection fuse. Never try to use a fuse of higher
amperage as this could damage the printed circuit board.
JUMPER PL1
This jumper allows us to calibrate the speed controller through a wide
variation of speed pulses. At the side of PLl is printed "H" (High), "M"
(Medium!, and "L" (Low). With the jumper across the low pins the
frequency within which the speed controller will operate is 24Hz
minimum up to 585Hz maximum, with the jumper across the medium
pins it will operate from 54Hz minimum up to 1300Hz maximum, and with
the jumper across the high pins it will operate from 86Hz minimum up to
2000Hz maximum.
TEST SOCKET
This socket is the female connection for the Test and Calibration Unit
(TCU). The TCU plugs into the connector and allows us to test the rood
speed controller. It also gives us a digital readout of the incoming pulses
from the vehicles Speedo/pulse generator.
8 PIN ELECTRICAL BLOCK
This is the main connector block into which we connect the fuel valve,
speed pulse, and power supply.
3 PIN CONNECTOR BLOCK
This is the connector block for the speed indicator unit, if required.
System 80 Rood Speed Control - Petrol
RM4003 B Issue 2
11
WIRING THE ECU TO AN ELECTRIC TACHOGRAPH
OR SPEEDO
BATTERY NEGATIVE (BATT-VE)
Always connect this to a negative battery terminal or earth point. Never
connect it anywhere else, as contact resistance in the vehicle may cause
voltage differences. This may result in the speed control working poorly or
not at all.
BATTERY POSITIVE (BATT+VE)
Connect this to a positive 12v or 24v after the ignition key switch.
SOLENOID POSITIVE (+VE)
This connection supplies a constant 12v or 24v supply down to the valve.
The valve is not polarity conscious, i.e. it does not matter which way the
wires from Sol +VE or Sol-VE connect into terminals 1 and 2 of the valve.
SOLENOID NEGATIVE (-VE)
This connection supplies a varying voltage to the valve, which in turn
causes it to open or close.
TRANSDUCER SIGNAL (SIG)
This connection supplies the ECU with the road speed signal from the
electric speedometer or tachograph (if fitted). Note. Tachograph
connections can be found on page 17.
WIRING THE ECU TO A GEARBOX SENSOR OR TRANSDUCER
If the vehicle has a mechanical Speedo head it is connected to the
gearbox via a Speedo cable. As there is no electronic Speedo pulse
involved we have to install a mechanical gearbox sensor. This is normally
fitted onto the output drive of the gearbox, however, in a small number of
cases it can be connected to the rear of the Speedo head. To install the
sensor, simply remove the Speedo cable, screw the sensor onto the drive,
and then replace the Speedo cable. The sensor wiring is then run into the
driving compartment where it is connected into the ECU.
The wiring colour code could vary. However, on the outside of the
packaging is a label indicating where each colored wire is to be
connected. If a problem is encountered, i.e. the sensor does not seem to
be working, connect a multi-meter (set to Volts D.C.) across the
transducer negative and transducer signal. Slowly rotate the sensors drive
pin and you should see a voltage variation from 0 - 4 Volts. This should
occur 4 limes for each complete revolution of the drive pin.
System 80 Rood Speed Control - Petrol
RM4003 B Issue 2
12
When installing a gearbox sensor
it is necessary to follow the
following procedure:




Ensure that the face of
the gearbox fittings is
clean and free from
damage and that the
threads are clean.
Insert the pin of the
sensor unit into the
gearbox fitting.
Push the sensor unit
tightly against the
gearbox and twist the
sensor unit to ensure that
it is positioned squarely
against the gearbox.
As you tighten the
retaining nut, keep the
sensor tightly against the
gearbox.
BATTERY NEGATIVE (BATT –VE)
Always connect this to a negative battery terminal or earth point. Never
connect it anywhere else as contact resistance in the vehicle may cause
voltage differences. This may result in erratic operation of the speed control or
prevent it from working.
BATTERY POSITIVE IBATT +VE)
Connect this to a positive 12V or 2.4V after the ignition key switch.
SOLENOID POSITIVE (+VE) - FUEL SOLENOID VALVE
This connection supplies a constant 12V or 24V supply to the Fuel Solenoid
Valve. The valve is not polarity conscious, i.e. it does not matter which way the
wires from the Sol +Ve or Sol -Ve connect into terminals 1 and 2 of the valve.
SOLENOID NEGATIVE (-VE) - FUEL SOLENOID VALVE
This connection supplies a varying voltage to the Fuel Solenoid Valve, which
causes it to open or close.
TRANSDUCER I+VE)
This supplies the gearbox sensor with a low voltage supply.
System 80 Rood Speed Control - Petrol
RM4003 B Issue 2
13
TRANSDUCER SIGNAL (SIG)
This supplies the ECU with a rood speed signal or pulse (similar to the
pulse from the speedometer).
TRANSDUCER NEGATIVE I.VEI
This supplies the gearbox sensor with a negative supply.
TRANSDUCER SCREEN ISCNI
This outer screen protects the signal and power leads against
interference and connects only to the ECU.
SPEED
INDICATOR
UNIT
The speed indicator is mounted on a flat surface, preferably on the
dashboard, in full view of the driver. Before installation it is
recommended to discuss the positioning of the speed indicator
with the vehicle owner to ensure that the customer is satisfied upon
completion. To mount the indicator screw through the lugs on
either side of the speed indicator. There are two LEDs on the front
panel of the indicator. The green LED indicates that there is a
power supply to the ECU. The red LED illuminates when the system's
set speed is reached and the fuel valve is closed. At the same time
a buzzer will sound. If the fuse which protects the ECU blows, both
the green LED and the red LED will half illuminate and the buzzer will
sound.
SPEED INDICATOR
System 80 Rood Speed Control - Petrol
RM4003 B Issue 2
14
Frequency ranges:
L - Low - 24 Pulses/Second (min) - 550 Pulses/Second (max)
M - Medium - 54 Pulses/Second (min)- 1300 Pulses/Second (max)
H - High - 85 Pulses/Second (min)- 2000 Pulses/Second (max)
NOTE:
The frequency range jumper is always factory set across the Low
(LI pins which will cover most vehicles. However, some vehicles
where the speed is sensed from an electronic Speedo can have
a very high pulse/sec count. Therefore, it may be necessary to lift
the jumper from across the Low (L) pins and place it across the
Medium (M) or High (H) pins.
System 80 Rood Speed Control - Petrol
RM4003 B Issue 2
SPEEDO OR TACHO
WIRING DIAGRAM
15
MECHANICAL
GEARBOX SENSOR
WIRING DIAGRAM
Frequency ranges:
L - Low - 24 Pulses/Second (min) - 550 Pulses/Second (max)
M - Medium - 54 Pulses/Second (min) - 1300 Pulses/Second (max)
H - High - 85 Pulses/Second (min) - 2000 Pulses/Second (max)
NOTE:
The frequency range Jumper is always factory set across the Low (L)
pins, which will cover most vehicles. However, some vehicles where the
speed is sensed from an electronic Speedo can have a very high
pulse/sec count. Therefore, it may be necessary to lift the jumper from
across the
Low (L) pins and place is across the Medium (M) or High (H) pins.
System 80 Rood Speed Control - Petrol
RM4003 B Issue 2
16
In a small number of cases the vehicle may be fitted with an electronic
tachograph. In this event, use the following connections.
MANUFACTURER
TYPE
SIGNAL
EARTH
NEG
POSITIVE
VE+
KIENZLE
1313
CABLE DRIVEN
KIENZLE
1310
C3
A6
A4
KIENZLE
1314
C3
A6
A4
KIENZLE
1318
87 -D3
A6
A3
KIENZLE
1319
B7-D3
A6
A3
VEEDER-ROOT
1425
D3/SPEED
C6
C4
VEEDER-ROOT
8300
B7-D3
A6
A3
VEEDER-ROOT
8400
B7-D3
A6
A3
V.D.O.
414-2
C3
A6
A4
V.D.O.
414-5
87
A6
A3
JAEGER
G54
B7
A6
A3
JAEGER
G50
B7
A6
A3
JAEGER
JAEGER
G 134
G 130
E3
E3
A6
A6
A4
A4
TACHOGRAPH
SPEED CONTROL
CONNECTIONS
In some cases, the strength of the speed signal from the electric Speedometer
may be weakened by connecting a speed control and/or other equipment.
If this is the case, it may be necessary to install a signal booster. This can be
supplied by Autokontrol Ltd.
System 80 Rood Speed Control - Petrol
RM4003 B Issue 2
17
TEST AND
CALIBRATION UNIT
TCU3
The TCU was designed to aid in the installation of the speed
control system. The facilities it offers the installer are:



System 80 Rood Speed Control - Petrol
RM4003 B Issue 2
It enables the speed control system to be set up without
driving the vehicle at the required speed.
It allows for checking the existing speed settings and
the re-calibration of new speeds, whilst the vehicle is
stationary.
It gives you a digital readout of the speedometer
signal whilst the vehicle is moving.
18
UNDERSTANDING THE TCU
POWER LAMP OR LED
This illuminates when the TCU is connected into the ECU and the vehicles
ignition is on.
DISPLAY
Use this to read off the frequency (pulses per second) and road speed (if
calibrated).
OPERATING LED
This illuminates when the ECU begins to supply power to the Fuel Solenoid Valve
INTERNAL (INT) AND EXTERNALL (EXT.) SWITCH
This is used to select between an internal signal, i.e. a signal produced by the
TCU, and external signal which is supplied to the ECU via the
speedometer/pulse generator.
CALIBRATION CONTROL
This is used to calibrate the TCU to the incoming speed signal from the
speedometer or mechanical sensor. When calibrated, the TCU (switched to
speed) will give a digital readout in KPH or MPH.
ADJUST KNOB
This knob controls the signal produced internally by the TCU. Turn the knob
clockwise and the digital display increases, turn it anti-clockwise and the
display decreases.
FREQUENCY IFREQ.) AND SPEED SWITCH
This is used to select internal or external signal readouts in frequency (Pulses per
second) or road speed.
DIN PLUG
This plug connects the TCU into the ECU's test socket.
System 80 Rood Speed Control - Petrol
RM4003 B Issue 2
19
CALIBRATION
CALIBRATING THE FREQUENCY/PULSES IF THE VEHICLE IS
FITTED WITH AN ELECTRONIC TACHOGRAPH
THE K FACTOR
The K Factor is the number of pulses per kilometer received by the
tachograph from its sender on the gearbox. This figure is normally
written on the inside of the tacho head when the tacho is calibrated. It
is possible to use this figure with the following formula to calculate the
frequency (pulses per second) produced at the maximum speed you
wish to set the speed control to.
FREQUENCY - K x SPEED LIMIT IIN KPH)
3600
THE W FACTOR
The W Factor is inter-connected with the K Factor. The W Factor gives
you the number of revolutions that the gearbox drive completes per
kilometer. This figure is also found inside the tacho head. Most
tachograph use an 8 pulse sensor, so in this particular case the K Factor
would be W x 8. However, some earlier tachographs used 2 or .4 pulse
sensors, therefore, it is necessary to know how many pulses the sensor
gives per revolution to work out an accurate frequency. To calculate
the frequency at a particular speed using W with an 8 pulse sensor, use
the following formula:
FREQUENCY - W x 8 x SPEED LIMIT IIN KPH)
3600
CALIBRATING THE ECU
There are a number of ways to calibrate the ECU, these depend upon
the equipment available and/or any relevant speed pulse information
known, i.e. K or W Factors.
CALIBRATING WHILST DRIVING THE VEHICLE
The simplest way to calibrate the ECU is by driving the vehicle at the
required maximum road speed. As you begin to slowly accelerate the
vehicle up to the controlled speed the speed controller may operate.
At this time, the Red LEDs on the PCB and Speed Indicator will
illuminate and a buzzer will sound. If this occurs before the controlled
speed, turn VR 1 clockwise until the speed control begins to operate at
your desired controlled speed. However, if you can drive beyond the
controlled speed without the speed control operating, turn VR 1 anti.clockwise.
The performance of the speed controller can vary dependent upon
the type of fuel system used by the vehicle manufacturer. With
carbureted engines, the vehicle's road speed may increase when the
controller operates. This occurs because the float chamber is still full of
fuel. However, as the float chamber empties the speed control will
eventually pull the vehicle bock to the controlled speed. After this, the
speed of the vehicle will fluctuate slightly around the controlled speed.
With fuel injection systems, the speed control response is much foster
and will prevent the vehicle from overriding the speed.
System 80 Rood Speed Control - Petrol
RM4003 B Issue 2
20
CALIBRATING THE ECU USING THE K FACTOR
Initially we need to calibrate the TCU, this is undertaken as follows:
1. Plug the TCU Into the test socket of the ECU.
2. Switch the ignition on which will power the TCU and ECU.
3. Read the K Factor from the tachograph head.
4. Calculate using the K Factor formula what the frequency should be at the
speed you wish to control the vehicle to.
5. Set your TCU to INT. and FREQ.
6. Turn the adjust knob until the value calculated in 4 is displayed.
7. Now switch from FREQ. to SPEED.
8. Turn the CAL. screw until the controlled speed used in.4 is displayed.
9. The TCU is now calibrated to the vehicle.
It is now possible to calibrate the ECU, as follows:
1. Leave the TCU switched to INT. and SPEED with the controlled speed
displayed.
2. If the red LED is ON, turn VR 1 clockwise until the red LED just goes out. If the
red LED is OFF, turn VR 1 anti-clockwise until the LED just goes out. The ECU is
now calibrated.
3. To check that the system works, start the engine.
4. Operate the throttle to bring the engine up to maximum revs.
5. Turn the adjust knob until operating LED illuminates, and the solenoid should
close thus restricting the flow of fuel. With carbureted engines it may take a
number of seconds before the engine revs are reduced whereas with
injection systems the effect is immediate. As you hear a reduction in engine
revs turn the ADJUST knob anti-clockwise until the operating LED goes put
and the engine revs should return to maximum.
ROAD TESTING
We recommend finishing with a road test to ensure correct operation of the
road speed control. Switch the TCU from INT. to EXT. but leave the switch onto
speed.
Drive the vehicle to ensure the TCU's digital display reads the same as the
speedometer.
As you reach the controlled speed the Red LEDs will illuminate and a warning
buzzer will sound. If this occurs before or after the desired controlled speed
adjust VR 1 accordingly. The performance of the speed control can vary
depending upon the type of fuel system encountered.
Please refer to Page 20, Calibrating Whilst Driving the Vehicle.
Before disconnecting the TCU, select the display switch to FREQ. And make a
note of this reading at the controlled speed.
Note both the frequency and speed readings on a label and stick it onto the
ECU, as this will help with future testing or re-calibration.
System 80 Rood Speed Control - Petrol
RM4003 B Issue 2
21
CHECKING THE ECU
Read off the set speed and frequency from the label in the cab or
on the ECU.
1. Turn the ignition on.
2. Switch the TCU to INT. and FREQ.
3. Start the engine and bring it up to maximum revs.
4. Turn the adjust knob until you read the frequency indicated on
the label. The operating LED on the TCU should illuminate and
the
engine revs should drop.
This shows the speed control is still set correctly.
RE-CALIBRATING THE ECU WITH THE TCU
1. Plug the TCU into the test socket of the ECU.
2. Read off the set speed and frequency from the label in the cab
or on the ECU.
3. Turn the ignition on.
4. Switch the TCU to INT. and FREQ.
5. Dial up the frequency with the adjust knob (as read in 21 onto
the display.
6. Switch from FREQ. to SPEED on the TCU
7. Adjust the CAL. screw on the TCU until the display reads the
same as the speed (as read in 21.
8. The TCU is now calibrated to the vehicles Speedo.
9. With the TCU switched to INT. and SPEED, dial up the new
controlled speed you require. If the red LED is ON, turn VR 1
clockwise until the red LED just extinguishes. If the red LED is OFF,
turn VR 1 anti-clockwise until the LED just illuminates.
10. lf you turn the adjust knob anti-clockwise, the operating LED
should go out. Turn the knob clockwise and the operating LED
should come on at your new controlled speed.
System 80 Rood Speed Control - Petrol
RM4003 B Issue 2
22
SEALING THE SPEED CONTROL SYSTEM AFTER INSTALLATION
It is necessary to seal all parts of the speed control system to prevent sabotage. How resistant the
system is to sabotage, depends on how well it is sealed.
GENERAL GUIDEUNES
When using sealing wire, try to avoid tight bends. This could lead to the wire breaking if subjected
to excessive vibration. If you are bridging large distances with the sealing wire, twist it together to
give extra strength. Run the sealing wire as straight as possible over the units to be sealed. Use
sealing paint where it is impossible to use sealing wire.
SEALING THE FUEL SOLENOID VALVE
Run the sealing wire through the pipe connections and the screw that retains the electrical plug.
SEALING THE ECU
System 80 Rood Speed Control - Petrol
RM4003 B Issue 2
23
FAULT
FINDING
PROCEDURES
IF THE VEHICLE WILL NOT START OR IS UNDER POWERED
IS THE ELECTRONIC CONTROL UNIT RECEIVING POWER?
Test the battery +Ve and -Ve connections on the ECU for power
using a multi-meter. If power is not present or is not correct for the
vehicle, i.e., 12v or 24v, then a different power supply is required.
Also check the fuse to see if it has blown. If it has, check the leads for
short circuits before replacing it.
IS THE FUEL SOLENOID VALVE RECEIVING POWER?
Check the SOL +Ve and -Ve connections on the ECU as detailed
above. If correct, check whether the valve is receiving power to
eliminate the possibility of a broken wire.
IS THE FUEL SOLENOID VALVE OPENING?
If power is present at the valve but the valve is not opening, check
whether the voltage reading is correct for the valve supplied. If
voltage is correct and the fuel pump is okay replace the coil and/or
the valve. A quick test of the valve is to connect it to the battery
positive and negative terminals. With power supplied to the valve it
should click as the valve lifts.
IS THERE A BAD PIPE CONNECTION?
Check all pipefittings for signs of leaks. Also, as a precaution, tighten
the pipe connections to ensure that air is not being drawn into the
fuel flow.
If a speed indicator continues to buzz when the vehicle is stationary,
this normally indicates a blown fuse in the ECU.
IF THE SPEED CONTROL SYSTEM DOES NOT WORK.
Complete checks detailed in the first section of
IF THE VEHICLE WILL NOT START OR IS UNDER POWERED.
IS THE ECU RECEIVING A SIGNAL?
To check for a speed signal, plug the TCU into the ECU and drive the
vehicle. With the TCU switched to EXT. and FREQ., you should receive
a digital readout of pulses, which will increase as the vehicles speed
Increases. If no reading is achieved, check your speedometer
connection, Or if you are using a mechanical sensor ensure the
colour coding has been followed (refer to section - Wiring the ECU to
a Gearbox Sensor or Transducer - page 12).
System 80 Rood Speed Control - Petrol
RM4003 B Issue 2
24
ALTERNATIVE FUEL SOLENOID VALVE (3/2WAY)
It is possible to replace the 2-Way Solenoid Valve, mentioned
previously in the manual, with a 3-Way version.
This 3 Port Solenoid Valve is powered "open" by the ECU When
the ignition is switched 'on'. This gives a pressurized fuel flow
through Port 2 and Port 1 to the fuel gallery. When the vehicle
reaches its maximum speed the solenoid valve shuts, re-directing
the fuel flow through Port 3.
This reduces fuel to the injectors of fuel thus reducing road
speed. Port 3 is connected directly to the return pipe of the tank.
System 80 Rood Speed Control - Petrol
RM4003 B Issue 2
OPTIONS
25
FUEL SOLENOID VALVE
PART NUMBER:
060-029 (12V), 060-030 (24V)
Valve Function:
2 Port, normally closed,
electrically operated control valve.
Operating Media:
Suitable for use with air, water, diesel,
oil, and petrol.
Port Size:
1/4" BSP
Voltage:
D.C. Supply: 12 or 24 volts
Protection Class:
Power Consumption DC:
Duty Cycle:
IP65
10 Watts
100% ED
Coil Insulation Class:
F (+ 1550 c}
ELECTRONIC CONTROL UNIT (ECU)
PART NUMBER:-
E216
Operating Voltage:-
9.6v - 28v D.C.
Supply Current:-
11 mA @ 28v
Input Frequency (Min.):-
24Hz
Input Frequency (Max.):-
2khz
Operating temperature:-
-20c to +60c
Maximum Output Current:-
1 amp
Protection Class:-
IP55
Speed limiter Box Dimensions:-
Length: 120mm
Width: 100mm
Depth: 46mm
System 80 Rood Speed Control - Petrol
RM4003 B Issue 2
TECHNICAL
DATA
26
DESCRIPTION
PART NUMBER
COMPLETE ASSEMBUES:
ELECTRONIC CONTROL UNIT
SPEED INDICATOR UNIT
E216
E306
VALVES:
FUEL SOLENOID VALVE (3 Way) 12 VOLT
FUEL SOLENOID VALVE (3 Way) 24 VOLT
FUEL SOLENOID VALVE (2 Way)12 VOLT
FUEL SOLENOID VALVE (2 Way) 24 VOLT
060-038
060-001
060-029
060-030
ACCESSORIES AND FITTING:
FUEL LINE FITTINGS
10.4 X 1/8 ADAPTOR (CROSS-DRILLED)
10.4 NUT (CROSS-DRILLED)
1 0.4 OLIVE
8MM STRAIGHT STEM CONNECTOR
JUBILEE CLIP
004-007
004-008
004-009
080-04-039
200-007
MISCELLANEOUS PARTS AND FITTINGS:
LARGE GROMMET
LONG THIN CABLE TIES
130-001
140-001
ELECTRICAL ITEMS:
1 AMP A/SURGE 20MM FUSE TSL
500MA Q/BLOW 20MM FUSE TCU
EF105/20
EF103/20
SECURITY:
SECURITY MONITOR UNIT
IMMOBILISER - SECURITY KEY SWITCH
SEALING PLIERS WITH ANVILS
SEALING WIRE
LEAD SEALS
SEALING PAINT
E262
E250
E159
E161
E160
180-065
TEST EQUIPMENT:
TEST AND CALIBRATION UNIT
VOLTAGE TESTER
00/TCU-3
E153
SENSORS:
A list of sensor applications can be found on the following pages.
System 80 Rood Speed Control - Petrol
RM4003 B Issue 2
PARTS LIST
27
PARTS LIST
SENSOR APPUCATIONS
MAKE
MODEL
Alfa Romeo
CONTINUE
SENSOR TYPE
Electronic
Audi
Electronic
BMW
1981 Onwards
Electronic
Citreon
Visa, BX, CX, XM, lSD,
311/4
C25D (1991 Onwards)
394/4
C35RD
343/4
Croma
344/4
Ducate
394/4
T empra
344/4
Tipo except DGT
344/4
Tipo DGT
Electronic
Uno and Van
344/4
Escort (Pre 1989)
321/4
Escort/Orion (After 1990)
329/4
Fiat
Ford
Sierra exel. DOHC (Pre 19911 321/4 or 383/4
Sierra exel. DOHC
(After May 1991)
383/4
Honda
Transit (Pre 1986)
321/4
Transit (After 1986)
383/4
All except Civic Shuttle
341/4
Civic Shuttle
381/4
Hyundai
341/4
Isuzu
341/4 or 381/4
Iveco
Daily (Pre 1990)
342/4
Daily (After 19901
Electronic
land Rover Discovery
Mazda
377/4 Speedo
All except E2200 (After 19911 341/4
E2200 (After 19911
Mercedes-Benz
381/4
321/4 or 344/4
on Gearbox
Mitsubishi
Nissan
System 80 Rood Speed Control - Petrol
RM4003 B Issue 2
All Types
340/4
Galant
Possibly 381/4
Bluebird
381/4 or 341/4
Maxima (19911
Electronic
Primera
381/4 or 341 /4
Sunny
Urvan
341/4
381/4
28
PARTS LIST
SENSOR APPUCATIONS
MAKE
MODEL
SENSOR TYPE
Peugeot
205
375/4
305/309
405
505 and Pick.up
384/4
384/4 or 392/4
394/4
605
384/4
5
384/4
5 Expresse
9 Turbo
375/4
Electronic
Clio (Carb)
384/4
Clio (Inj)
Electronic
11 (Analogue Dash)
384/4
11 (Digital Dash)
25 TS/GTS/TX
(Exel. on-board computer)
Other 25 models
Electronic
Espace
384/4
Traffic and Master
384/4
214
321/4
216
341/4
825
Electronic
99
37/4
900
37/4
9000
Electronic
Renault
Rover
Saab
Subaru
384/4
Electronic
381/4
Suzuki
All Models
341/4or 366/4
Toyota
All Models
340/4
Volkswagen
Golf 1100-1300 (Pre 19911
Golf 1600-1800
Diesel (Pre 19911
321/4 or 390/4
All Golf Models {After 19921
Electronic
LT
321/4
Passat (Pre Oct. 1987)
321/4
Passat (After Nov. 1987)
Exel. On-board computer
321/4
System 80 Rood Speed Control - Petrol
RM4003 B Issue 2
390/4
CONTINUE
continued
29
PARTS LIST
SENSOR APPLICATIONS
CONTINUE
MAKE
MODEL
SENSOR TYPE
Volvo
200 Series
321/4
240-245
Electronic
300 Series
321/404342/4
440 (excl. on-board computer) 365/4
Vauxhall
480,740/760,850
Electronic
Cavalier
321/4
Astra
321/4
Omega
321/4
Corsa
321/4
CD & GST Models
Possibly Electronic
USA Vehicles
Freight Rover Sherpa
System 80 Rood Speed Control - Petrol
RM4003 B Issue 2
Usually 371/4
372/4 or 382/. 4