Syvecs Forums

I've wired these in for people a few times for various ECUs.

Apart from +12V and the trigger, there are two grounds. One is supposed to be taken back to ground pins at the ECU and the other taken to the engine block. They worked for me wired like that, anyway!

cyl02knockIgnRtd?

It may not like VVT on X10 inputs either as it can't reliably get the data, via CAN, to sync up correctly.

If its an F88R it only has 8 frequency-capable inputs and I suspect AN16 isn't one of them!

SCal says yes. Look under Datastreams, and then "Bosch ABS M4 CAN Receive" and there's "M5 Mode Enable".

Yep - agreed - Syvecs rewrite of the actual spec is ambiguous. DBW is good to go

yes, but the GDi4 spec does not mention it having full-bridge capability. It's probably just not written very well. But I still commend checking with Syvecs as these little things are there to bite!

There is no GDi4 section and, as I understand it, the GDi4 is a variant S8 anyway. As said by Stevie, do not drive constant current devices such as pumps direct. Nor PWM high current devices (such as pumps). And I can't see a way in SCal of assigning a pair of half bridges to a DBW motor. But maybe ...

PWM using low-side drivers is still the ECU sinking current - no different to an injector drive. However, it is generally not a good idea to drive fuel pumps or water pumps direct from the ECU - they just take too much current. If you want to PWM these, use external solid state relays. DBW motor is ...

Most outputs are low-side drives so it's more down to the current-sinking ability of the ground connections rather than the limit of the VBatt pins. DBW and GDi high side drives are the exception to that. Datasheet and other documentation shows what each drive output is capable of. But, basically, w...

Guess the $1m question is whether the ECU vendor should allow loads of flexibility in CAN configuration to allow you to match the setup to 3rd party equipment, or if the 3rd part equipment vendor should adjust their CAN data to match the ECU's demands.

Discuss