986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - '99 Boxster Tiptronic not firing after engine overhaul

Kice · 04-07-2023, 04:47 PM

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?

04-07-2023, 04:47 PM	#10
Kice Registered User Join Date: Apr 2021 Location: MD Posts: 22	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?