Not that I mean to resurrect an old thread, but I'll blame my mate's request...
Madcat wrote:Isuzu designed relays into the oil pressure and alternator output. if either of these are below the minimum it will kill the engine...
If people are interested as to why oil pressure should not be linked to fuel pumps, let me know under here - or a new thread.
Oil pressure to kill an engine kill is fine - eg, EMS or ignition kill.
Fuel pump control should be from the EMS, or from alternator charge signals, spark sensors, or airflaps - but not oil pressure.
They are two separate functions (ie, safety versus engine preservation) and though this seems generally well understood nowadays despite manufacturers recently
doing contrary - eg, Isuzu, JE Camira, etc, I occasionally see the practice continued.
I can't recall the Piazza situation.
(FYI - I was searching for an "isolation switch with engine kill" diagram I had. I found detailed descriptives on HoldenGemini.com but no diagram. Alas I found Madcat's comment here and that reminded me of those that may not yet know better.)
IZU069 - ISUZU means a lot to me.