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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

No start condition

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Old Oct 20, 2005 | 04:02 PM
  #61  
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subford
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From: Easton,Ks
It has to be a bad plug or wire from your ICM to the PCM. Maybe when you lift it up to check it, it makes contact but when you plugged it into the PCM it breaks contact.

It could also be that your breakout box makes better contact with the pin than your PCM.

 
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Old Oct 20, 2005 | 05:14 PM
  #62  
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kenjan61
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From: niantic, ct.
212 code shows during the key on engine off test. I am beginning to wonder if this maybe normal. with the engine not running there is nothing being sent. everyone that has looked at with me and talk to just scratch their head. ford dealer says run it until it breaks. great help there.
 
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Old Oct 20, 2005 | 06:40 PM
  #63  
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subford
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From: Easton,Ks
The PCM knows the engine is not running from the no PIP input so it should not give the code.
Here is what the book said to do next after following your description.

Key off.
Breakout box installed.
PCM and ICM disconnected.
Measure voltage between Test Pin 4 at the breakout box and battery negative post.
Key on, engine off.
Measure voltage between Test Pin 4 and Test Pins 40 and 60 at the breakout box.
Is any voltage reading greater than 10.5 volts?

Yes
SERVICE short circuit. REMOVE breakout box. RECONNECT all components. RERUN «Quick Test».

No
Key off.
Breakout box installed, PCM disconnected.
ICM disconnected.
Ignition coil disconnected on Non-CCD vehicles (refer to Pinpoint Test «Schematic»).
Disconnect Scan Tool from Data Link Connector (if applicable).
NOTE:
For proper results of this test, the Scan Tool must be disconnected. Due to the circuitry of the Scan Tool and the vehicle, voltage can be fed to the VREF circuit giving a false indication of a short to power.
For Shorts To VREF:
Measure resistance between Test Pin 4 and Test Pin 26 at the breakout box.
For Shorts To PIP circuit:
Measure resistance between Test Pin 4 and Test Pin 56 at the breakout box.
Is each resistance greater than 10,000 ohms?
Yes
GO to «NA7».
No
SERVICE short circuits. REMOVE breakout box. RECONNECT all components and SCAN Tool (if applicable). RERUN «Quick Test».
 

Last edited by subford; Oct 20, 2005 at 06:47 PM.
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Old Oct 20, 2005 | 07:28 PM
  #64  
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kenjan61
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sub, i have been all way to the point of "replace PCM" na12 alldatadiy.
 
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Old Oct 21, 2005 | 07:52 AM
  #65  
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kenjan61
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I think you are absolutly correct with make and break when its being tested and when it is connected. wiggle and shake tests aren't showing any change though.
 
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