ECU connector wires are normally
referred by the connector and pin. eg C27 refers to pin 27 of connector ‘C’.
Important ECU Pins
The ECU connectors are color coded:
Each connector has pins numbered from
1 to 40 organized into five rows. The pin number is visible on the wire
side of the connector once the plastic cover is removed.
For each connector large pins are
used on the top and bottom rows; small pins are used in the middle three
To either insert or remove connector
pins you first must slide the white plastic surround upwards slightly to
unlock the pins.i
Crimp the pin onto the wire using a
crimp tool. We recommend a Molex tool with a 1.6mm diameter crimp.
First ensure you have the correct
cavity – it is very difficult to remove a pin once in place. To insert the
pin push it in with the open side of the crimp
upwards, until the pin clicks in place.
Once finished move the connector
white plastic surround back into position to lock the pins in place.
The tool is inserted from the ECU
side of the connector to lift a sprung plastic catch while pulling on the
wire from behind. Do not use much force on the wire, otherwise to pin will
dig into the plastic catch and the pin will be very difficult to remove.