Haltech Platinum Sprint 500 (HT050700) User Manual
Page 15
Crank and Cam Position Sensors (Trigger and Home)
The Crank and Cam Position sensors are required so that the ECU has the necessary
information available to it to determine engine speed and position at any point in time.
Generally 2 sensors are required - a cam position and crank position.
However many cars will have just a cam position sensor that is capable of giving the ECU
enough information to run the engine correctly. Vehicles that have a crank position
sensor only are not capable of determining the difference between compression
stroke and exhaust stroke and therefore are not suitable for sequential fire
applications. In this case a cam position sensor may need to be added for the ECU
to determine if the engine is on compression or exhaust stroke.
There are generally 2 types of trigger signal:
●
Hall effect signal (0-5v digital square wave signal)
Generally a hall effect sensor will require a power supply (could be 5V, 8V or
12V), a ground and have a signal wire. Most hall effect sensors have 3 wires.
●
Reluctor signal (analogue style signal).
This type of Sensor will generally only have two wires, Signal Positive (+)
and Signal Negative ( - )
Figure 6 – Hall Effect Sensor Wiring
*
*
*Please note: Red and Blue wires must
be insulated to avoid shorting
Figure 7 – Reluctor Sensor Wiring
CAN Devices
The Platinum Sprint 500 ECU can interface directly with selected CAN devices.
CAN connections can be found on the 8 pin rear connector.
A 120 OHM terminating resistor connected between CAN High and CAN Low
terminations may be needed in some applications where the ECU is located at the end
of the CAN Bus.
The ECU is equipped with an internal terminating resistor which can be enabled by
fitting a wire link between pins 2 and 6 of the 8 pin connector.
( Please see example below , connector sold separately Haltech Part # HT030003 )
Wiring Information for our range of data acquisition dashes can be found on our website
Figure 12 – Terminating Resistor Example
Figure 13 – Rear CAN Connector (Sold Separately)
HALL EFFECT SENSOR
+12V
SIGNAL (+)
GROUND
NOT CONNECTED
4 CORE TRIGGER OR HOM E
CABLE FROM ECU
RELUCTOR SENSOR
SIGNAL (+)
NOT CONNECTED
4 CORE TRIGGER OR HOM E
CABLE FROM ECU
SIGNAL (-)
NOT CONNECTED
1
2
3
4
5
6
7
8
Device
1
Terminating
Resistor
Required
Device
2
Terminating
Resistor
Not Required
Device
3
Terminating
Resistor
Not Required
Device
4
Terminating
Resistor
Required
CAN BUS
Pin #
Function
1
Ground
2
120 Ohm Terminating Resistor Loop
3
CAN LO
4
12V Out
5
Reserved
6
120 Ohm Terminating Resistor Loop
7
CAN HI
8
Reserved