Loss of power and shut off while driving
- Thread starter RatherBeRacing
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- Thread starter
- #22
Will be trouble shooting on sat.
What battery are you running? I didn’t have the exact issue, but I had a similar issue with consistent electrical gremlins while driving. I had a 3 month old AGM battery. I swapped out for a standard interstate battery from Costco and the issue has not returned thus far. Probably not even close to your issue, but it worked for my situation.
- Thread starter
- #24
Interesting. I have AGM and I have had it for 5+ years without issues. The only gremlin I had was non working headlights for a week, which was really odd but seemed common in other toyotas.
My electronics were shutting down altogether and rebooting while driving. Never lost power to vehicle, but lights shut off and came back on, stereo rebooted back to screen that comes up after battery is disconnected. Checked connections and everything I could think of. Found a thread where someone had a similar issue and they had changed battery to fix. Beyond weird.
- Thread starter
- #26
Well...no success yet.
Obd2 scanners don't connect and I wasn't able to get techstream/ mvci to work well together so wasnt able to connect with techstream. For some reason when I launch techstream it doesn't see the xhorse/mvci cable even tho it's connected and working per mcvi firmware tool.
I did add 5 gallons and replaced battery. 5 year agm battery doesn't hold charge for long and drops below 11V. I dont think I was out of gas. 5 gallons brought gauge well over quarter tank.
I tried holding start for 15 seconds per manual but that didn't work.
It just doesn't want to crank.
VSC and VGRS warnings in LCD screen plus 4lo and VSC warning lights.
If anyone has good links for getting techstream to work that'd be great.
Obd2 scanners don't connect and I wasn't able to get techstream/ mvci to work well together so wasnt able to connect with techstream. For some reason when I launch techstream it doesn't see the xhorse/mvci cable even tho it's connected and working per mcvi firmware tool.
I did add 5 gallons and replaced battery. 5 year agm battery doesn't hold charge for long and drops below 11V. I dont think I was out of gas. 5 gallons brought gauge well over quarter tank.
I tried holding start for 15 seconds per manual but that didn't work.
It just doesn't want to crank.
VSC and VGRS warnings in LCD screen plus 4lo and VSC warning lights.
If anyone has good links for getting techstream to work that'd be great.
Pretty sure your starter is shot if you've never replaced it. Like I said, the low voltage situation probably was a catalyst for it's demise. Techstream won't give you any additional hints on this.
Can you verify the engine is not locked up by putting a ratchet on the crank bolt and turning it? I’d verify that before looking at replacing the starter.
Furthermore, have you taken a rubber hammer and given the starter actuator a few whacks to see if that might jimmy the starter to want to run again? (temporary fix to get you by for now)
Furthermore, have you taken a rubber hammer and given the starter actuator a few whacks to see if that might jimmy the starter to want to run again? (temporary fix to get you by for now)
You can verify that it might be the starter from the following symptoms
Listening with the door open or from outside with someone else hitting the start button - distinct click, and some whirring as the relay plunger pulls the engagement lever for the starter gear.
To me the refusal to get anything from the OBD port on a known good Bluetooth adapter is a big red flag. I’d be digging into fuses, checking voltage at said fuses, etc.
- Thread starter
- #31
Had it towed to dealer today. Tech said bad powersteering pressure sensor. They will replace tomorrow. 400 for sensor and 500 for labor. Hopefully, there are no other issues after replacement.
Please get more details. A power steering issue causing a no-crank sounds like it wouldn’t meet a lot of our expectations for reliability.
Stranger things have happened but that would be really odd and I tend to agree with @bloc . Pretty sure it would not cause a no-start, and def not a no-crank. The powersteering pressure sensor is usually used by the engine ECU for idle up to make sure there's enough engine torque at idle to power the hydraulic PS circuit.
- Thread starter
- #34
Exact quote: "the technician Found that the power steering pressure sensor has internal short causing multiple systems to malfunction. Tech suggests replacing the sensor to correct your concern."
I just looked up in the WSM. Doesn't look like a hard job and I really would like to know how that ever shorted out. My car does have a fair bit of rust so maybe stuff was corroding.
I just looked up in the WSM. Doesn't look like a hard job and I really would like to know how that ever shorted out. My car does have a fair bit of rust so maybe stuff was corroding.
- Thread starter
- #36
Well apparently the car is fixed and ready for pick up.
Hopefully the invoice will have some more detailed notes.
Hopefully the invoice will have some more detailed notes.
Did a little digging in the EWD. The switch has signal to the ECM, ground, and 12v provided by the EFI-Main fuse, which when popped will shut off the whole computer.
A no-crank in a pushbutton start system makes sense. As does inability to get CANBUS to work.
- Thread starter
- #39
Interesting. Is EWD the wiring diagram? Can you share or point where I can get it. I got the WSM but the diagrams are sprinkled throughout.
Search on here for factory service manual. There is a way to download the official copy and host it on your computer for use. That includes the Electrical Wiring Diagram.