M1 to PDM ignition, fuel pump setup sequence

[Islandworks]

I'm trying to get a good setup for the "ACC" between the motec can keypad, the PDM30 and the M150.

In have a killswitch that powers the CAN-devices and then 3 levels on the ACC.

0- Nothing
1- Light up dash and ECU
2- Ignition, inhjection on and prime fuel pump

All communication between PDM and ECU is via Can and the same network that has the keypads.

I'm however having an issue with how to setup so the ACC so that the fuel pumps only prime once I'm att ACC 2. As it is now the can message to run the pumps comes from the M150 as soon as the ECU lights up and that is too soon.

I was playing around with the engine run switch but could not get it to run over Can bus from PDM as that is not a button but rather a function in the PDM.

What's the best way to do this following other good examples?

[Stephen Dean]

Hi,

The M1 will send a Prime request for the Fuel Pump when the following conditions are met.

The fuel pump is activated as soon as the engine starts to turn.
Priming commences when the engine run switch is On and Fuel Pump Prime is > 0.
The pump will not run when the engine run switch is Off.

If the Engine Run Switch is defaulted to On (Base setting) then the Fuel Prime will prime each time the M! is powered up.

In my PDM, I have configured the Engine Run Switch from the Keypad Button using a Toggle Function.

Function.Master.On=
toggle(Button.Ignition.Main, edge=rising)
and Switch.Master = true.

This code checks that the Master switch is active and toggles the state of the function with each button press.

I then transmit the state of this Function into the M1 as a Driver Switch to control the Engine Run Switch.

[Islandworks]

Thanks! This would solve my issue.

I had a look at it and will have to figure out how to configure a drivers switch in the M150 to read a can output from the PDM I guess?

[Stephen Dean]

Hi,

If you post the configuration files from the PDM and M1 I can help with that.

[Islandworks]

Both files enclosed.

I'm trying to get the driver switch to be sent from PDM to ECU once master.acc.counter=2. This in turn makes master.acc.state_ignition=true.

I've tried to map engine run switch to driver switch 1, but cannot figure out the CAN -> ECU way of working.

Happy for any help I can get!

[Stephen Dean]

Hi,

I have made some changes to the attached files, can you load them and test them thanks.

I changed the Engine Capacity from 3800 litres to 3.8 litres as well.