P1670 code - Diesel Forum - TheDieselStop.com
'99 & up 7.3L Power Stroke Engine and Drivetrain Discussion of the '99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

 
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post #1 of 7 (permalink) Old 04-14-2012, 02:58 PM Thread Starter
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P1670 code

Started my 99.5 this morning and hit the windshield wipers and it died. Now it won't start and has P1670 code. Truck sat outside in rain and snow at an odd angle. I suspect the IDM may have been soaked from runoff, and the wipers never moved. I have checked the respective fuses, and still no start. The batteries are not in the best shape, and now it has a charger on them, along with the block heater. Any help is appreciated. Also, where is the IDM?

99.5 F350 SC 4X4, 2005 KZ 33P Sportster Toyhauler. 2011 F-350 Lariat 6.7 picked up 10-04-2010. NICE RIDE!
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post #2 of 7 (permalink) Old 04-14-2012, 03:24 PM
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You are probably on the right track checking out the IDM. It is in the driver's side fenderwell. You'll need to pull the liner to get to it - at least the back part. Here's how: IDM.pdf

Also, there are reports of the CPS throwing that code, and there are correlations between windshield wiper interference and CPS issues. I don't believe that's your problem given the wipers won't come on at all.

Check your IDM relay - swap it for its neighbor for a trial start.

Also, make sure and check fuses with a multimeter. It sucks to go through ten hours of testing just to find the fuse was blown in the corner where you didn't see it.

Don't forget about the windshield leak issue on the early models - rain runs through the seal and soaks the GEM module - makes for some wierd electrical issues.

2003 F-250 XLT Crew Cab 7.3L, Chrome BigTex Grille Guard, Quad pillar - 3 ISSPRO gauges (trans, pyro, boost) and DP-Tuner F6; Roush fuel pressure / temperature / oil pressure gauges, Ford Severe Duty AIS, 31 row 6.0 transmission cooler, ScanGauge II, Marinco mod, Walker BTM

I wonder if clouds ever look down on us and say, "Hey, look - that one is shaped like an idiot!"
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post #3 of 7 (permalink) Old 04-14-2012, 03:40 PM Thread Starter
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The wipers do work when I checked it an hour ago. Where are the IDM relays?

99.5 F350 SC 4X4, 2005 KZ 33P Sportster Toyhauler. 2011 F-350 Lariat 6.7 picked up 10-04-2010. NICE RIDE!
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post #4 of 7 (permalink) Old 04-14-2012, 03:45 PM
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If you don't have your owner's manual, you can download one here - https://www.fleet.ford.com/maintenan...ls/default.asp

Under the hood, there is a power distribution block. On the right side, there are a line of relays. The third one down (#32) is the IDM relay.

2003 F-250 XLT Crew Cab 7.3L, Chrome BigTex Grille Guard, Quad pillar - 3 ISSPRO gauges (trans, pyro, boost) and DP-Tuner F6; Roush fuel pressure / temperature / oil pressure gauges, Ford Severe Duty AIS, 31 row 6.0 transmission cooler, ScanGauge II, Marinco mod, Walker BTM

I wonder if clouds ever look down on us and say, "Hey, look - that one is shaped like an idiot!"
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post #5 of 7 (permalink) Old 04-14-2012, 04:23 PM Thread Starter
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Thanks for the help. I am just waiting for the rain to let up and check the relay, and check to see if the tach moves when the engine is cranked. If this doesn't work, I'll tow it home and work on it tomorrow.
Thanks again.

99.5 F350 SC 4X4, 2005 KZ 33P Sportster Toyhauler. 2011 F-350 Lariat 6.7 picked up 10-04-2010. NICE RIDE!
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post #6 of 7 (permalink) Old 04-14-2012, 06:25 PM Thread Starter
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Still won't start, but the tach moves and oil pressure comes up. Taking the towstrap to it now.

99.5 F350 SC 4X4, 2005 KZ 33P Sportster Toyhauler. 2011 F-350 Lariat 6.7 picked up 10-04-2010. NICE RIDE!
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post #7 of 7 (permalink) Old 04-15-2012, 09:10 PM Thread Starter
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Borrowed my neighbors truck with good IDM, and mine is definitely toast. Now to get on ehere ASAP. Thanks for your help.

99.5 F350 SC 4X4, 2005 KZ 33P Sportster Toyhauler. 2011 F-350 Lariat 6.7 picked up 10-04-2010. NICE RIDE!
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