'99 Boxster Tiptronic not firing after engine overhaul

[blue62]

Originally Posted by Kice

Thanks. I checked the relays in the trunk per Bentley manual and they all seem ok.

I also measured the voltage directly from the CPS connector when cranking the engine and it clearly produces a signal. So the CPS seems to be fine.

I am however unclear how to check if that signal reaches the DM, because when I disconnect the DME connector to check for the signal on the respective pins the car will not start at all. I guess need to jumper the starter for that test?

Use a Multi Meter to check continuity and for short to ground on the respective pins