2001 Automatic No Start, no Click

No click, no start, on a 2001 4x4 Tacoma automatic. I have dash lights, headlights, and key indicator chime. New fully charged battery, replaced starter contactors, cked starter relay, tested ok but I replaced it anyway with a new unit, new park start switch on the trans. No change. I removed the starter relay and jumped across terminal 3 to 5 and the truck started up fine. Turned it off and attempted to start with the key. Still will not start! I need some more help. Truck is in awesome condition except for this problem.

 

With everything you've done already, I'm going to say ignition switch.

 

+1

 

Yeah bet its gonna be something in the am1 and/or am2 fuse line.....

am2 powers the coils,......am1 runs most everything else ......fuel pump.....injectors....ect...

Right in the middle of all that....the ignition switch......
that and a handful of relays......

 

Another weird thing about these trucks.....the mass air flow sensor circuit provides a ground for the start circuit....
if there is a problem with it.......who knows....

 

So I do appreciate all of the help. So to be sure, you are suggesting the ignition switch inside the column not the keyed ignition assembly. I ask that because in the past I have noticed that my key is a bit rough working sometimes. After your posts I thought of this and wondered if possibly had something to do with my problem? Thanks

 

If my EWD is the same pins 3and5 are the starter relay contacts .

if this is the case your starter relay has failed.

 

No I was talking the electronic part right behind the key part.....
both of these wear out eventually.......the rough key is just your steering lock fighting the key.....

Both of these should be replaced every 150K.....so you dont get stranded or cant turn the truck off.....
that switch can send u packing......so having a cheap backup in your tool bag may not be a bad thing.....

switch provides power to the coils, injectors, fuel pump, and a START SIGNAL...
3 different pathways......

 

So I finally found the time to order and replace the plastic ignition switch. Was pretty stoked to try the key but was dissapointed as it still doesn't crank . I have full dash lights etc with no dimming when I turn the key to start position. I thought for sure that this switch would do it. I cked every fuse on the panel below and right of the column and also every fuse in the master fuse block in the engine compartment. Recked the grounds and battery terminals also. Very clean. Any more ideas friends?

 

Have you tried it in Neutral?

 

So you're not getting a 12v signal (juice) to the starter relay.....
but if you force or short out that line that relay connects, it cranks and starts....

 

We really need to start from the basics and go from there.
I’d pull the STA relay and check for power, signal, and ground.
But first see if the STA fuse is getting power in the START/Cranking position

Pin 5 is power to relay
Pin 3 is power out of relay.

It sounds like you are missing the signal for the relay. Pin 1
Or possibly, but not likely, a bad ground for the relay. Pin 2

In any case, you need power to pin 1 when cranking.

 

Isnt that ground for the relay signal a floating ground that is first provided by the MAF.....
which gets shunted as the engine runs......

One of the few mysteries I have left.....

 

Not according to my diagrams.
It ties directly to EA ground point. (The one right by the battery)

 

Yes, as you suggested there is no power to number one terminal when the key is turned to the start position. Is that a fairly simple feed wire running to that terminal or are there more candidates for failure between the ignition switch and the starter relay number one terminal? As you can tell I don't have a lot of time off work to continually work on this, ha!

 

Yes, lots of stuff.
I’d start with checking the STA fuse.
See if you have power to the fuse when cranking.
And make sure the fuse is good.

If the sta fuse is good.
We then need to move to the Park Neutral switch.
I’m not saying the switch is bad.
But we need to see if power is getting to it.

 

I have a starting problem that seems to be in the same realm. Once every 20 or so starts, when I turn the key I just get a click and then nothing. If I disconnect/reconnect the negative terminal of the battery, the truck will then start as normal. Battery is new.