no start no rpm signal - Toyota Nation Forum : Toyota Car and Truck Forums

4dRcOrOlLA · 07-26-2010, 12:17 PM

ok ma car wouldnt start today the code was 12 no rpm, how do i check this thanks

SuperRA · 07-26-2010, 03:50 PM

I don't know where the rpm signal comes from but I'd start checking the ignition system.

rdyzz · 07-26-2010, 10:46 PM

rpm is from the ignition

4dRcOrOlLA · 07-27-2010, 08:02 AM

But willOk this cause it to crank and no start and also I been hearin a buzz around my cluster. By the way I have dx sedan with a canadian cluster with a tach tha prob. Came of the le model thanks for yal reponce

90 GP · 07-27-2010, 03:38 PM

Check wiring at distributor for breaks and loose plug in connections. Check to see if timing belt is broken. Verify by pulling distributor cap and have someone crank engine to see if rotor turns.

SuperRA · 07-27-2010, 06:12 PM

Quote:

Originally Posted by 4dRcOrOlLA

But willOk this cause it to crank and no start

Yes, a faulty ignition system is one of the things that will cause that to happen.

4dRcOrOlLA · 07-27-2010, 07:49 PM

b4 the cluster i use a external tach and i had to splice one of the distr. wire is tha probably it? because i move the wire around to c if i can cause problem but it didnt do anything thanks guys

rdyzz · 07-27-2010, 08:27 PM

best and easyiest way without splicing anything to use an external (aftermarket) tach is to get the signal from the IG- on the diagnostic port.

was the car running previously? if so did you change somthing, if you did im guessing that after that change the car wasn't running. also its not a bad idea to check the basics, cam timing, ignition timing.

90 GP · 07-28-2010, 03:18 AM

Check the connection where you hooked on tach wire to distributor wiring to make sure it isn't shorting out to ground. It should be soldered,well taped and in some protective sheath (heat shrink tubing ) to prevent it from shorting to ground. If you made your connection with one of those crimp connectors try replacing it with a new one. You might also try experimenting by disconnecting the tach wiring from the distriburor wiring to see if it will start that way.

4dRcOrOlLA · 07-28-2010, 06:47 AM

I don't have the tach anymore because I got the le cluster and if the timing belt broke I wouldn't be able to start ma car which I can and ig is the name. Of the port. Ex. Like te1

SuperRA · 07-28-2010, 12:34 PM

Quote:

Originally Posted by 4dRcOrOlLA

and if the timing belt broke I wouldn't be able to start ma car which I can a

What do you mean you wouldn't be able to start your car? I thought you couldn't start your car? Do you mean you are able to CRANK the engine but it won't start? In the case of a broken timing belt, you WOULD be able to crank the engine and it wouldn't start. Take off the distributor cap and have someone crank the engine. If the rotor doesn't turn, then it is likely your timing belt has broken. That would also possibly cause no RPM signal since the distributor isn't turning (where the RPM signal comes from I believe)