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Dan
Dan, Technician
Category: Ford
Satisfied Customers: 23740
Experience:  Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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Need help trouble shooting dtc p1746 on a 2000 ford focus.

Customer Question

Need help trouble shooting dtc p1746 on a 2000 ford focus.
Submitted: 7 months ago.
Category: Ford
Expert:  Dan replied 7 months ago.

Hello, my name is***** code sets when the PCM detected an unexpected voltage condition on the Electronic Pressure Control (EPC) solenoid control circuit. This fault can cause maximum EPC pressure, harsh engagements and shifts. This would most likely be caused by a failed EPC solenoid. Here are replacement instructions, let me know if you have more questions. Thanks.

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https://www.dropbox.com/s/f42zkxuraqqiqp8/epc.pdf?dl=0

Customer: replied 7 months ago.

Thank you, ***** ***** been replaced code persist thank you

Expert:  Dan replied 7 months ago.

Then next step is testing wiring between PCM and solenoid, if good replace the PCM. Let me know if you have more questions, thanks.

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Customer: replied 7 months ago.

Ok great! So what am I looking to find on the wiring? Thank you and please excuse my ignorance.

Expert:  Dan replied 7 months ago.

You will want to unplug solenoid and unplug PCM, wire should have under 5 ohms resistance between the two points and if so replace the PCM. Let me know if you have more questions, thanks.

Customer: replied 7 months ago.

Ok I'll check that and get back to you thank you

Expert:  Dan replied 7 months ago.

Sounds good, I'll talk to you then. Thanks again and have a good night.

Customer: replied 7 months ago.

Yes a have 4.5, 4.omhs

Expert:  Dan replied 7 months ago.

You should have under 1 ohm on each wire. If you are sure test is being done correct then next step is looking for wire damage or running new wire.

Customer: replied 7 months ago.

Sorry I got confused you said under 5 ohm resistance on earlier message, now it should be under 1 ohm?

Expert:  Dan replied 7 months ago.

I meant to say under .5 ohms.

Customer: replied 7 months ago.

Ok great so 4 to much, so what should I do next, thank you

Expert:  Dan replied 7 months ago.

If you are sure wire was tested correctly then next step is to follow wire to find damage or run new wire.

Customer: replied 7 months ago.

I'm sorry so the wires need to be checked from pcm harness connector to the epc conector correct? Not the transmission connector side an epc. Thank you

Expert:  Dan replied 7 months ago.

That is correct.

Customer: replied 7 months ago.

Ok hold on

Expert:  Dan replied 7 months ago.

No problem, thanks.