Sale ends todayGet 30% off any course (excluding packages)
Ends in --- --- ---
Forum Posts
Courses
Blog
Tech Articles
Discussion and questions related to the course PDM Installation & Configuration
= Resolved threads
Hi all. I have a PMU16 and Link G5 Neo 4 powering a K20. I'm working through my pin mapping on the PMU and am trying to work out the safest way to avoid back feeding the ECU. This is a list of the engine entities that need power and connect directly to the ECU (i.e. no relay)
Injectors
Coils
VTEC solenoid
VTC solenoid
Lambda (wideband LSU 4.9)
Crank position sensor
Intake cam position sensor
Exhaust cam position sensor
Coolant temp sensor
Intake air temp sensor
Reverse lockout solenoid
Alternator excite
My original plan had the engine functions split across 2 outputs then a separate "electronics" output to power the ECU, ADU, keypad etc. I then changed to power the ECU through one of the engine outputs. My concern with this was if the output for the electronics tripped and the engine output pins were still live then the ECU could be back fed, i.e. from the lambda?
Is there a safe way to manage this? I would think I could pair the outputs in the PMU software so if one failed then the other also shutdown? Apologies if this was covered elsewhere, I couldn't find much information about it.
Thanks!
I would just have the logic for all sources for potentional backfeeding, conditioned on the ECU main power output being active (i.e. not faulted, or turned off).
Makes sense, thanks David.
