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PCM pinout missing pin 47 and 50 contacts, where exactly is the H02 S12 wiring (WH-BK) routed?

Tiny
PABLITZIN
  • MEMBER
  • 2005 FORD ESCAPE
  • 6 CYL
  • AUTOMATIC
  • 130,000 MILES
Engine PCM has no pins for position 47 and 50, so where exactly is the H02 S12 wiring (WH-BK) routed? How can I check where the ground fault is if there is no connection at the PCM that is shown on the wiring diagrams.
Saturday, August 1st, 2020 AT 9:24 AM

1 Reply

Tiny
AL514
  • MECHANIC
  • 4,125 POSTS
Hello, I've been looking through the diagrams as well, and you're right it's confusing. Are you sure the wire isn't black/white? Because I found this generic electronic module, it's another type of PCM. Like a slave module I think. It has black/white going to it(power) and coming out black/white ground. Update: So, this ECM has 3 different connectors, here's all 3. C175T is the one you need. Pin 48 and 48 are your oxygen sensor heater circuits.
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Saturday, August 1st, 2020 AT 2:34 PM

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