I've been lurking here since I bought my 1998 Bonneville SE from my Father in Law about a month ago. (107,000 mi) I have searched and found helpful information, thanks.
My question today has to do with the code referenced. I've been going through component testing and evaluation to try to resolve the check engine light. According to my FiL it'* been on for about 50k miles. I had it read and found out what it meant, so I'm not terribly concerned about it, but with it lit I can't tell when something more important comes up.
I replaced the gas cap because it was easy and cheap and started through the vacuum hosing and components in the engine compartment. I got to the evap canister solenoid and haven't been able to satisfy myself that it is working. It shows between 25-45 ohms resistance across the pins of the solenoid and the connector from the wiring harness shows ~11.5 VDC with the ignition switch in "Run" position. However, there appears to be no activation of the solenoid.
If I understand my Haynes schematics correctly, 12 VDC is available in Run, Bulb Test, or Start conditions (AKA "ALL THE TIME") with ground (I assume) coming from the PCM. Shouldn't this solenoid energize (click) when the key is turned to run?
If the solenoid is actually energized all the time, what in the heck is it for except to get you to make pointless trips to a mechanic for a system fault that doesn't make any difference to the performance of the car, the atmosphere, or the United Federation of Planets? Can I bypass it and lie to the PCM somehow?
So how can I tell if I need to flush $16.95 down the toilet to replace this part?