Vehicle: 2012 Ford Escape, 4WD, V6-3.0L,
Problem: This vehicle came in to the shop
because the engine ran rough and there was a strange smell coming
from the exhaust. The transmission was also shifting harshly into
The tech connected a scan tool to view the parameter
identification (PID) data and found the battery power from the
ignition switch (VPWR) at 0v.
Next, the tech checked for VPWR from fuse #23 at the PCM
connector C175B, pin #21 and found there was battery voltage at
the connector. He unplugged the connector and checked the pins
for being bent or corroded. They were in good condition. He
also tested all the power and grounds at the PCM. They were all
good as well.
Confirmed Repair: Since the power and
grounds to the PCM were in good condition, the tech installed
and programmed a new PCM. With the new PCM in place, the rough
running and harsh shifting problem was fixed.