This van is has been modified to be a wheelchair accessible taxi, so many components have been shifted and relocated. Since its the only taxi of its kind in our little city, its tough scheduling time to have it in to be serviced, especially to diagnose issues. Finally got it in for a block of a few hours yesterday. Just recently purchased coverage for this vehicle on Mitchell DIY's site, in order to get some good wiring diagrams etc. Have to say wiring diagrams of course are great (don't print quite as nicely as when had prodemand but still ok)but when it comes to finding out repair information or part locations..this site is not so great. I can see the big differences in it and the prodemand site, maybe why its called DIY is that they might figure that all that extra time it takes you to find info you are looking for is no big deal since you are just working on your own car and under no time constraint.
I have Auto Enginuity laptop scanner for our little cab repair shop (just maintain cab fleet, don't do regular shop work)and couldn't find any actuation to turn purge solenoid on and off to verify its function. Finally found a circuit description of the evap system and had hard time understanding it, for its written by engineers to be understood by engineers kinda thing..delta pressures etc..but I did glean out of it that the ESIM switch is supposed to be pulled closed to seal system while engine is off. Located the ESIM, which is on the vent canister housing (vent canister had been relocated from atop the fuel tank to along the side, and found that the air intake filter and hose which is supposed to be installed on the intake of the ESIM is missing. Looks like it never made the relocation trip. I'm thinking this allowed contaminants directly into the ESIM switch and caused its failure to close.
I ran the ESIM functional test with the scanner, but not really sure what all that accomplished, but I did note on the screen during test that the ESIM switch never closed, which I think its supposed to.
Come Monday will be contacting the dealer for a replacement fresh air filter and hose assembly as well as replace the vent canister. If anybody has any other suggestions for me to try or how to verify the purge solenoid is working properly when I can't command it, please let me know. Both wires go to PCM, maybe I did verify sort of by touching my test light which was connected to B+ to the t pinned control wire..the solenoid clicked.
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