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Chrysler Repair/'99 minivan: autostick not working

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Expert: - 9/25/2011


Question
1999 grand caravan 3.8 137,000 mi. with the auto stick. Sifting through many sites on the web, yours was by far the most helpful in fixing the p1698 code. I found the #11 wire from the tcm broken in the loom at the speed sensor. My ?, is the auto stick and the overdrive switch not working related to more problem wires or is it something else entirely?  They did not work prior to the p1698 code.

Answer
Hi Steve,
The autostick feature is not related specifically or dependent upon the digital communication problem of 1698.
The transmission control module operates those features based upon what choice of resistors to ground which are programmed into the switch are presented to it. The wire at the switch that should show ground (black/yellow) in on pin 2 of the switch, while pin 1 of the switch is a yellow/violet wire that goes to pin 55 of the tcm which is observing the values of resistance. I would verify that those wires are continuous, and then verify that the switch indeed shows some finite and different values of resistance between pins 1 and 2 except in the off position which should be 'open'.
Roland

Chrysler Repair

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Roland Finston

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I specialize in Chrysler/Dodge/Plymouth cars, minivans, and SUV's for the model years 1982-2008 based upon my 50-year DIY experience, factory shop manuals and wiring diagrams. I offer fast repair advice to help you minimize repair costs by helping you diagnose and do it yourself. Problems with electronically controlled engines and transmissions as well as body wiring problems are my specialty.

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Five decades as a 'do-it-yourselfer' on domestic and imported cars

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Yahoo Autos Group called The Chrysler Lebaron Club (co-moderator)

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Degrees in Physics/bruised knuckles.

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"Top expert of 2010" and "2011" at Allexperts. Among top 50 experts for years 2006-2009 at Allexperts.

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