Matt Danger's B5 S4 Owner Log

I’ve been doing some bench flashing to get myself used to the flashing tools and the process in general. Pretty simple, here’s how I did it:

What you need:

• ECU
• DC power supply
• Flashing cable (Ebay, Galleto, etc)
• Multimeter
• Small gator clips
• Wire
• Small gauge connectors

Set up your DC power source. I have a $17 Pyramid PS-3KX that does 13.8v. I tried using an ATX (computer) power supply (12v) but it would shutdown after a minute or so of powering the ECU and harness. Not sure if I was overloading the power supply or if it was because the power supply was 10 years old.

The wiring is simple. Power the ECU and power the cable. Then connect one K-line wire between the two.

ECU pins:

• Pin 1 -> Ground
• Pin 2 -> Ground (can be shared/connected with pin 1)
• Pin 3 -> 12v
• Pin 43 -> K-line on your ODB cable (Pin 7)
• Pin 62 -> 12v

ODBII cable pins

• Pin 4 -> Ground
• Pin 7 -> K-line on ECU (Pin 43)
• Pin 16 -> 12v

ECU pinout reference

ODB pinout reference. NOTE: The ODB pin out on Ross Tech is from the vehicle side. The pins on your cable will be reversed.