Programming Pin Out

RidgeRacer · Guru

Programming Pin Out

Gadget · Senior Member

I won't have a chance to clean the rest of the potting compound from my ECU until the weekend, but once I do I intend to document the unlabled pins as well as start tracing the injector/ignition/sensor pins to their connection points on the ECU.

Gadget · Senior Member

After cleaning just the connector pins, I was very surprised to see them labeled!

Here's the service-manual unlabled pins, as they are labeled on the ECU:

Pin 4: RXCK
Pin 5: TXCK
Pin 7: TXD1
Pin 24: RXD1
Pin 25: RST
Pin 28: FWE
Pin 37: COS2
Pin 50: COV3
Pin 51: COV2
Pin 52: COV1
Pin 56: TS
Pin 57: EXS

Looks like the re-flashing pins are going to be 7,24,25, and 28. Plus power and ground of course.

Anyone know what the othe pins might be for? If it helps, the ECU labeling used names like NT for neutral transmission, STA for starter, CLT for clutch...

-- Edited by Gadget at 01:02, 2008-11-30

RidgeRacer · Guru

COV1, COV2, and COV3 are the 'Yosh' plug Analog inputs. There should also be a COS1 and COS2 somewhere

Blackgixxer · Veteran Member

Hello Gadget,

thanks for the info.
Can you proof Pin 37? The workshop manual says IREL (FP relay) is on Pin 38.
Do you have photos of the connector pin area you could post or mail?

Gadget · Senior Member

You're correct, pin 37 is COS2. Thanks for catching that.
Here are the ECU board markings -

pins 003.jpg

Blackgixxer · Veteran Member

Hello Gadget,
could you please mail the pics to me?
I still can´t access your server.
Thanks a lot!

Gadget · Senior Member

I emailed you the pics. Please email me your external IP address, my firewall blocks most everyone outside the US since my customers and users are located in the states. If your IP is 204.11.52.128 for instance, I only need to know the 204.11.52. I'll open the whole range for you, I just can't open everything up to the world. Too many bots to deal with...

Gadget · Senior Member

Which ground pin is it best to use for the uploading? The bandit has available:

Pin 29 Sensors Ground
Pin 34 ECM Ground
Pin 58 Ground
Pin 59 Ground for ignition system

I was leaning towards pin 29. What do you think?

-- Edited by Gadget at 16:55, 2008-12-13

Blackgixxer · Veteran Member

Gadget wrote:

Which ground pin is it best to use for the uploading? The bandit has available:

Pin 29 Sensors Ground
Pin 34 ECM Ground
Pin 58 Ground
Pin 59 Ground for ignition system

I was leaning towards pin 29. What do you think?

-- Edited by Gadget at 16:55, 2008-12-13

You should use Pin 34 for Ground

Gadget · Senior Member

Sounds good. Here's the Bandit schematic then (PetriK inspired).

RidgeRacer · Guru

I think you pin 30 is in fact Map Select not programming mode select. Historically Denso has marked the programming mode MD1 and many of the newer bikes don't have it pinned out.

Because FWE and MD1 are always switched together they just use the FWE and have it internally switch the MD1.

Also experience is showing that the reset is really unnecessary. You can really simplify construction by just wiring the following...

USB +5 to FWE
USB TX to RXD1
USB RX to TXD1
USB Gnd to Gnd

This way when ever the usb is powered up and you power up the ECU it goes into boot mode.

The only advantage to the switch and reset is if you want to switch back and forth between User mode and boot mode without turning the power off on the ECU.

Put a 'Yosh' plug on the end of it and move three of your yosh plug pins on the ECU connector and you have a nice little 'factory' wire harness flash plug.

Interceptor · Veteran Member

May help pin ECU. I have all the manuals of Suzuki and many others.

Interceptor · Veteran Member

RidgeRacer wrote:
This way when ever the usb is powered up and you power up the ECU it goes into boot mode.

The only advantage to the switch and reset is if you want to switch back and forth between User mode and boot mode without turning the power off on the ECU.

RR, you´ve to say that the bandit has the ability to connect in User Mode? It could also read the file, or only record (flash)? I do not know if I understand ...