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Old 02-28-2022, 09:05 PM   #35
lrbraner
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Join Date: Jan 2018
Location: Ft. Wayne, IN
Posts: 408

2002 L-Series 3.0L Sedan
2003 L-Series 3.0L Wagon
Default Re: 02 LW300 V6 Fuel Pump and OBD2 Trouble

Quote:
Originally Posted by Rj 2000 LS2 View Post
The engine will rotate but will not start if the crank position sensor is bad. I am thinking the key switch is not really switching the RUN wire to ON, therefore gauges don't work and the ODBII device can not connect because nothing has power. This would also explain the no start issue. I really don't know how to test or diagnose the key switch functions. But, it makes sense why it is not working properly and all the other items are chasing tails.

There must be a method to test the key switch to determine if the power is switched ON to all modules.
That has not been my experience.
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2002 L300 Sedan
2003 LW300 Wagon
2005 L300 Sedan
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