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Quad driver code P1640 help

Tiny
JONTHU193
  • MEMBER
  • BUICK REGAL
Electrical problem
1994 Buick Regal 6 cyl Front Wheel Drive Automatic 150K miles

Could someone please post a scan of a diagnostic flow chart for a cod P1640 on a 1994 Buick Regal with a 3.8 engine? I would like to find out what the quad driver that's throwing the code actually controls so I can troubleshoot the problem and not replace parts that do not need replacing. Thanks for any help.
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Saturday, January 24th, 2009 AT 1:47 AM

1 Reply

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS


https://www.2carpros.com/forum/automotive_pictures/261618_Noname_167.jpg



https://www.2carpros.com/forum/automotive_pictures/261618_Noname2_49.jpg



https://www.2carpros.com/forum/automotive_pictures/261618_Noname3_31.jpg



https://www.2carpros.com/forum/automotive_pictures/261618_Noname4_18.jpg



https://www.2carpros.com/forum/automotive_pictures/261618_Noname5_9.jpg



https://www.2carpros.com/forum/automotive_pictures/261618_Noname6_5.jpg




https://www.2carpros.com/forum/automotive_pictures/261618_fig_5.jpg



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Saturday, January 24th, 2009 AT 2:30 AM

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