Power requirements for M190

Hey all, I'm working on installing an M190 on my Volvo 242 Turbo build. Overkill I know, but I got a deal on it :)

Trying to understand how much power the M190 needs from the PDM30 I'm using. My initial thought is one 20A output should be sufficient. Plan is to splice the 4 20AWG power wires out of the AS616-26SN connector on the M190 to 1 14AWG wire. From the PDM two 18AWG wires splice to 1 14AWG.

I saw in the HPA FJ40 harness build that 3 8A channels are being used to power the 3 power inputs on the M170 in that build, so wanted to check that my power supply was sufficient.

Thank you!

My guess is that would be adequate. I'm assuming the injectors and multiple coils are powered from this same source. Is that a Drive-by-wire, or are you planning to use any high-powered high-side Half-Bridge outputs?

I was planning to power the injectors and coils off other PDM outputs given this is a pretty simple build (4 cylinder with LSx coils, cable throttle, no VVT) and I'll have the channels I need. I'm using a Honda IAC and a MAC boost controller which will need PWM. Appreciate the quick response David

You will probably find the ECU alone draws about 3-5A then.

That's what I had in my head, thanks David. It makes sense in the FJ40 example above it would need more current with the ECU powering DBW, 2 banks of VVT, etc. Thank you!

Looking at the logging from my car, the average draw from the M150 over a session is 3.5A, with spikes up to 10A when the DBW throttle is snapped open. Injectors (port) and coils are not adding a lot of current draw as they are driven to ground, same with control of solenoids, these should be done using low side control where possible.

Make sure that you have all of the grounds wired in correctly, as there is typically more current being grounded by the M1.

Sounds good, thank you. For ground I fit 18AWG wires into the size 20 socket terminals on the AS616-26SN connector. The 6 18AWG ground wires then splice to 4 16AWG wires which ground to the engine block through a bulkhead connector.