P0475, P1690 Codes and Test of WGC Solenoid - Ford Powerstroke Diesel Forum
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Old 01-17-2013, 01:52 PM
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P0475, P1690 Codes and Test of WGC Solenoid

This is an update to my earlier post about the SES light. I drove the truck a couple times with the AE software running and all I got was the SES light and P0475 code after it warmed up. Soooo, I unhooked all the sensors for the Edge w/Attitude controller as I thought it might be bad and plugged in the stock connectors. I checked each one and all were clean w/o oil or water.

Started the truck this morning and SES light came on almost immediately and the bad idle started with code P1690. Some searching found that this is the WGC Solenoid and I found a troubleshooting page to test. With key on, I have 12.5 volts at the pin of the connector. I then checked for a short to ground, but all is okay. I checked the resistance of the solenoid and according to specs it is supposed to be > 50 ohms and mine read about 5 to 5.5. I tried different scales on the meter and it stays at 5 or so.

I am thinking this means a new WGC solenoid? Any input would be a great help.
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Old 02-01-2014, 03:56 PM
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Just checking in to see if you fixed your problem. I too have a 1690 dtc and have been checking into it. Having trouble reading the volt meter settings. One test says resistance between pin 1 and ground should be greater than 10000 ohms, should I have the scale set to 20k? Then next test suggest like you to test both pin 1 and 2 and reading should be greater than 50 ohms, when I tested it was 1352 set on the 2000k setting. Any ideas?
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Old 02-01-2014, 04:02 PM
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When using a manual ranging meter, you want to select the setting higher than what you expect it to read, so yes 20K for reading 10K ohm source would be correct. If you are unsure of the reading, start with the highest setting on the meter and work your way down.
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