Hey all,
My 2007 V6 SR5 4x4 (automatic) is having the problem described in this thread. About a month ago I was up at Crater Lake. (Hot day, maybe 80-85 degrees at around 5800'.) After getting into the park, I stopped to use the restroom just inside the entrance. Got back into the 4Runner and she wouldn't start. All electronics seemed to work fine (windows, radio, lights, etc). No click, no starter engagement. Just nothing. I thought it might be the park/neutral switch, so I used the override and ran through the gears a few times to no avail. Tried getting a jump, same result. Tried arming and disarming alarm, nothing. Called AAA and settled in for the 4 hour wait with a picnic just downwind of the pit toilet. Tried starting it about every 20 minutes, thinking maybe there's a chance it was heat related. About 2-1/2 hours into the ordeal it started right up.
No problems for a month. Then yesterday in the Costco fueling station: same problem right after I filled up. (Maybe 95 degrees outside, at sea level.) Pushed her out of the fueling lane and into a proper parking spot. Ran home to get my multimeter, had a friend drive me back to the 4R. Not sure what to test, we checked battery voltage. 12.5V. Tried starting the engine. Nothing. Battery voltage steady at 12.5V, no change during start attempt. No sure what that tells me, except that maybe the ECM is not allowing the starter to be energized? Does the ECM even do that? Anyhow, brought her home on a flatbed. Attempted a start right after the wheels were back on the ground; started right up.
So now I'm nervous about taking it anywhere. Need to resolve this. Went with the easy thing first: clean battery terminals. They already looked pretty good, but cleaned them anyway. BARE SHINY METAL WITH TIGHT CONNECTIONS, as recommended previously in this thread. Also verified the ground cables appear to be in good condition and secure. That was today.
I have an OBD-II reader with Torque. I checked for codes, but none were displayed. Is there something else I can see through the OBD that might tell me why it won't start?
What about the safety inputs that prevent the starter from engaging? How many are there? I remember reading something about a door lock safety switch somewhere. Is there such a thing? How could I test the P/Neutral safety switch? Would it be easier to change the starter first? (I'm not a fan of changing components without validating it through testing beforehand. But is that the best course of action here?)
Summary of possibilities, based on what I've read:
Check cables (done)
Check ground (done)
Defective chip in key (never even heard of this happening before)
Replace starter (Plausible. Seems to be the consensus.)
P/N safety switch (not sure how to test...)
Door lock safety switch (is there such a thing?)
Check ACC Cut relay (I found testing instructions. Will test and report.)
Check starter relay (I found testing instructions. Will test and report.)
Check ECM (How? Take to dealer? Local shop?)
Also, I found some weird greenish blob of, what I believe is, some sort of corrosion buildup material just aft of the fuse box under the hood. I've attached some photos. Does anyone know what this is? Should I be concerned?
All advice is much appreciated.
Many thanks dudes and dudettes.
