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RB25 OEM Loom To Megasquirt 3 Pro Module

EFI Wiring Fundamentals

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Discussion and questions related to the course Motorsport Wiring Fundamentals

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Hi guys,

Customer bought a wiring harness for an RB25 Engine the loom uses the oem Denso 76pin connector and the oem wiring diagram. Im going to use a Female 76pin connector but i need to pair it to a Megasquirt MS3 Pro Module.

The oem pin out uses 2 cam(pin#41,#51) and 2 crank sensor(pin#42,#52) input pins, but the megasquirt module only has 2 inputs. also the ecu uses only one 12v pin to power the ecu, but on the rb25 oem wiring pin out it uses 2 pins(#49,#59).

How can i go about wiring the female 76pin connector to the MS3 Pro Module?

Attached is the RB25 Oem ECU pinout and the MS3PRO Module picture.

Attached Files

there is a reply on another thread. please try and keep it to only one post

Regards Ross

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