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Old 08-21-2019, 04:49 PM   #11
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i did try and register on autozone but it wouldnt cooperate. probably because i am in the uk. i blame brexit. i am looking through the schematic now, but am yet to find the 6-pin egr version connector. did you find it?
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Old 08-21-2019, 04:56 PM   #12
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the schematic appears to be for a 2002 focus. mine is a 2007. is this the correct drawing?
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Old 08-21-2019, 05:18 PM   #13
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Quote:
Originally Posted by paulj71645 View Post
the schematic appears to be for a 2002 focus. mine is a 2007. is this the correct drawing?
i.havent given up yet.
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Old 08-21-2019, 05:22 PM   #14
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this is the egr i have in my focus
https://www.fordownersclub.com/forum...r-valve-fault/
the post seems to suggest that it has 12V commons on pins 2 and 5, and 4 stepper coils on 1, 3, 4, and 6. would be good to verify with a drawing.
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Old 08-21-2019, 09:45 PM   #15
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https://www.picoauto.com/support/topic14281.html This UK forum may have what you need.
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Old 08-21-2019, 11:10 PM   #16
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What appears to be separate stepper coils there is more likely to be a resistor bridge to identify position more carefully. There is no need for 4 stepper motors in a device like that. One using duty cycle will work using one volt source and the other volt source goes to the bridge to be variably reduced to indicate egr position.

Last edited by amc49; 08-21-2019 at 11:14 PM.
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Old 08-22-2019, 02:26 AM   #17
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Originally Posted by amc49 View Post
What appears to be separate stepper coils there is more likely to be a resistor bridge to identify position more carefully. There is no need for 4 stepper motors in a device like that. One using duty cycle will work using one volt source and the other volt source goes to the bridge to be variably reduced to indicate egr position.
the p0403 fault code does mention 4 motor coils:

P0403 EEGR Electric Motor Windings Or Circuits To The PCM Shorted Or Open The EEGR system is continously monitored to check the 4 EEGR motor coils, circuits, and the PCM for opens, shorts to power and ground. If a malfunction is detected the EEGR system will be disabled and additional monitoring will be suspended for the remainder of the drive until the next drive cycle. EEGR motor windings open
Connector to EEGR not seated
Open circuit in harness from PCM to EEGR
Open circuit in PCM
Short circuit in EEGR motor
Short circuit in harness from PCM to EEGR
Short circuit in PCM
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Old 08-23-2019, 08:27 AM   #18
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Finally found the 6-wire stepper motor type egr wiring:
pin 1 = coil 1 low side
pin 2 = coil 1&2 high side (12V)
pin 3 = coil 2 low side
pin 4 = coil 3 low side
pin 5 = coil 3&4 high side (12V)
pin 6 = coil 4 low side

see sheet 54/132 in the link: https://www.fordownersclub.com/appli...t.php?id=42087

Last edited by paulj71645; 08-23-2019 at 08:56 AM. Reason: neatness
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Old 08-23-2019, 01:03 PM   #19
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You DO realize that one single motor run through a resistor bridge can be essentially 4 different motors right?

If there were 4 separate physical motors there it would be beyond doubt the most stupidly created device on earth, but then I get surprised like that every day now it seems. The engineers of today..........massively bound to complicate the things that were 100% reliable for 75 years to then make them screw up every 5 minutes.........it's all about SELLING MORE PARTS.

So, from the piezo strain gauge (DPFE, and not that reliable either) to 4 complete motors...........things have only gotten worse at Ford..........and why I will never buy one again. I saw this ineptitude coming 20 years ago.

BTW..............the link there is invalid.
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Old 08-23-2019, 01:10 PM   #20
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I'd like to see one of those POS devices broke down into pieces, it would be likely good for a laugh.
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Last edited by amc49; 08-23-2019 at 01:13 PM.
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