Re: Scanner cant connect to pcm / ecm
Well here's what it was boys... Once upon a Time I had a PATS problem (bad Transducer) BUT I failed to notice fast blinking PATS lite so I FIRST changed fuel Pump for nothing - When I changed Fuel Pump I cut the Fuel Tank Pressure sensor wires & spliced back...
Yes I am awaiting original PCM back fm Guru who i had check it out... BTW I only went to P71 ECM after a new Transponder & Refurbished Hybrid Electronic Cluster did'nt cure my PATS code 16 - Most opinions say 2002 P71 ECM PCM is plug & play & easiest PATS workaround.
ALSO - My factory manual...
I now have 12V at Fuse 20 & ALL Fuses - Have Power at ALL relays - Have power & grounds at DLC - Scanner cant connect to PCM, No Start, no Fuel pressure - no PATS issue as I have p71 ECM.
Why do I only have 6 Volts at Fuse Holder 20 in the Underhood Box with Switch in On position & in Start position ? - Labeled in handbook as INJECTOR & PCM - I am PRAYING thats my problem_______?
- I have 12V at the PCM Relay in same Box but that Voltage comes fm the big Fuse in same Box - I...
- Checked EVERY Fuse, EVERY Relay... all good - "Scanner cant connect to PCM " - Checked for Power & Grounds at DLC Connector... all good - Changed PATS Transciever - Tried both keys
- From what I see a bad HEC could be cause right_____?
- HEC / Hybrid Electronic Cluster / SELF TEST found one in a PDF but cant attach - Mine will NOT go into Test Mode, just gives me the 5 second countdown - I guess its dead___?
- Older types below:
Ford HEC Dealer Test Mode To enter the Ford HEC Dealer Test Mode On the instrument cluster press...
75k Miles, ran great - Suddenly starter spins but no Fuel at rail - Towed her home - Installed new Fuel Pump - Still no Fuel at Rail & FINALLY noticed that PATS lite was blinking fast UNlike the PATS lite in my other 5 Fords & Lincolns - Realized I had changed Fuel Pump "just for fun" - PATS...
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