Powering up the ECU
The main power wire must be wired via the shortest route possible to the battery
positive terminal. The main power to the ECU must be connected to the battery and
NOT the ignition switch, the ignition switch will not be able to handle the current
required to operate the ECU (there is an additional pink wire within the Platinum Sport
loom that connects to the ignition switch to switch the ECU on).
Three Positive Cables need to be connected to the battery from the loom
( 1 x 2mm Red/Green , 1 x 2mm Red, 1 x 0.5mm Red/White )
To avoid damage to ignition components, never connect the ignition modules to the
ECU until the ECU is configured. The same applies to the fuel system, never connect
fuel injectors until the ECU is configured, otherwise the engine may flood with fuel.
Grounding
One of the most common wiring problems experienced is poor grounding. There
should be no paint, anodising or other surface layer protection between the ground
wire and engine block or chassis. Temporary wiring will almost certainly cause a
problem, use a proper ground eyelet terminal and do not use loctite or similar
locking agents as they may become insulators preventing good earth connection.
Chassis Ground (Black) should be connected to the chassis of the vehicle, and
Signal Ground (Black / White) should be connected directly to the Battery negative terminal.
Please make sure your Engine block has a ground strap to the chassis.
Figure 11 – Main Power Wiring
CAN Devices
The Haltech Platinum Pro ECU's 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
putting a wire link between pins 2 and 6 of the 8 pin connector
( Please see example below ).
Wiring Information for our range of data acquisition dashes can be found on our website
www.haltech.com
Figure 12 – Terminating Resistor Example
Figure 13 – Rear CAN Connector
FUEL PUMP AND IG12V
INJ12V
ECU +12V
SIGNAL GROUND
CHASSIS GROUND
CHASSIS
12V BATTTERY
+
SWITCHED 12V IGNITION
IGNITION SWITCH
+12V
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