2005 lexus lx470 strange ignition behavior. (1 Viewer)

[Dirt Limo]

I tried to search but no luck.
When i go to start my car i turn the key to start and nothing happens. I then let go of the key and the car then starts itself.

 

[morganism]

sounds like a ground issue, check each coilpacks ground, and let us know if it helps.

 

[PabloCruise]

I always start at the battery connections - clean those puppies!

 

[Dirt Limo]

Watch "2005 lexus lx470 strange ignition issue" on YouTube


Video clip of it happening

 

[ogsuv]

Definitely weird.
Is this a new to you rig? Anything recently done to it or when this started to occur? jumpstart? Dead battery?
I would be looking under the column area for aftermarket wiring, remote start, etc... or if wires modified.
Other longshot thoughts...starter gunked up and or holding up the plunger (never heard of this ever happening) or the extra weight on your keyring causing a GM like ignition issue. Starter relay? on a 2000 it is under the hood in the fuse block near the battery

 

[billygoats]

Seems normal to me. 2003+ had one touch ignition where you don't need to hold the key to start it, unlike the 98-02.

 

[ogsuv]

huh... learn something new every day

mentioned in the below link as "crank hold feature"

Slee Off-Road 100 Series Newbie Guide

 

[Dirt Limo]

Wow never knew it had that function, thanks all

 

[billygoats]

Wow never knew it had that function, thanks all

All my cars except my 2001 Lexus GS have this one touch feature. When I try starting my GS, it looks like it's broken and won't start first try since I just tap the starter. Have to try starting again and holding it......like a "normal" car!

 

[Dirt Limo]

Changed cracked relay and delay is gone

 

[Dirt Limo]

Changed cracked relay and delay is gone

I was wrong it wasnt the relay, I am leaning towards crankshaft position sensor, due to getting a new check engine light

 

[Spike555]

Turn the key on, do not start the engine.
Check engine light comes on.
Now start the engine.
Check engine light goes out while cranking the engine, crank position sensor is good.
Check engine light stays on while cranking the engine, the crank position sensor is bad.

 

[Pyrenees]

Turn the key on, do not start the engine.
Check engine light comes on.
Now start the engine.
Check engine light goes out while cranking the engine, crank position sensor is good.
Check engine light stays on while cranking the engine, the crank position sensor is bad.

That's a pretty cool test.

 

[Dirt Limo]

Turn the key on, do not start the engine.
Check engine light comes on.
Now start the engine.
Check engine light goes out while cranking the engine, crank position sensor is good.
Check engine light stays on while cranking the engine, the crank position sensor is bad.

Mine tests bad new one will be here today

 

[Dirt Limo]

Crankshaft sensor did the trick. It must have been that time my truck was parked in 30+ inches of muddy water for an hour

 

[skhochay]

Watch "2005 lexus lx470 strange ignition issue" on YouTube


Video clip of it happening

remove the key to rest the lock then try it again.