2001 Toyota celica

No start and No spark on 2 and 4 after engine rebuild

Any suggestions on what next test should be?

No signal coming from ECU to trigger the coil on those same cylinders 2-4 on 1 and 3 I did get a trigger signal and are fireing. Checked wire for open circuit and tested OK and also for a grounded circuit.

Looks like ECU but mechanic said that the ECU tested OK. Said wiring problem coming from crankshaft sensor to ECU. Tested wire for ground and it was OK tested wire for continuity and it was good.

Suspect ECU. Does anyone know if this ECU needs to be programmed when and if I Replace it?

What engine is this?

L4, 1.8L 2OHC

Your really not giving us much information here, but I'll give it a go.

Looks like 4 wire coils.

These 3 are the same for all coils

Black - Battery positive from ignition relay
Black/Yellow - Power from ECM
White/Black - Ground

Coil Control by ECM

Cyl 1 - Red/Black
Cyl 2 - Red/White
Cyl 3 - Green/Red
Cyl 4 - Red/Yellow

Check inputs at all coils & tell us what you are missing. If you are missing coil control, check outputs at ECM

Coil control at ECM

Cyl 1 - Red/Black - Pin 10 @ ECM
Cyl 2 - Red/White - Pin 11 @ ECM
Cyl 3 - Green/Red - Pin 12 @ ECM
Cyl 4 - Red/Yellow - Pin 13 @ ECM

Once all the above have been checked, let us know the results & we will go from there

Good Luck - arbez

2zz? Individual ignition coils? 2 wire cam and crank sensor?

Should be 2 wire sensors. Lets see what he's missing at the coils before we go down that road. He seems to be new at this.

I wouldn't suspect a bad sensor, if his symptoms are consistent. Possibly damaged or incorrectly installed exciter gear/wheel? Engine was just rebuilt, so anything is possible.

lets see what he says.

Last time I saw this was on a Subaru. The 1.6 was swapped out for a 2.0 (kept the 1.6 pcm) but they didn't change the cam and crank gears. The pcm only fired 2 cylinders.

Wires tested good for Power from ignition and Power from ECU, Ground was good as well. no coil control on cylinders 2 and 4

You checked output at the ECM? Verified powers & grounds?

If you have no output, you have to check your inputs. If you have spark from 2 coils & do not from the other 2, I would not suspect the sensors. But you have to check them anyway.

Not that this is a great way to test the sensors:

Cam Ohm spec's - 835-1400 cold - 1060-1645 hot.
Crank Ohm Spec's - 1630-2740 cold - 2065-3225 hot

If the Ohm spec is OK, it's time for a scope. Cam & crank correlation. See what you see. Post a screen shot.

I still suspect a damaged pick up wheel. I'd pull the sensors & slowly rotate the motor. Look at the pick up wheels & look for damage or cracks.

Let us know.

I still need to verify powers and grounds on ECM (but I have power and ground to all coils, would that indicate power and ground being OK on ECM? Will check anyway). Do you have a schematic that shows what pins on the ECM to check?
Also are you talking about the cam position sensor and the crank sensor?

Ohms in range on both sensors
Cam=1.07
Crank=1.99

Don't have a scope but will visually check the wheels for damage or cracks. Did not check for powers and grounds on ECM as I figured it was OK since I'm getting power and ground at each coil. Will check but I need a schematic that can show me what pins to check.

Do you have power at the cam & crank sensors? Might be 5V. They share power from the computer. Signal out is orange wire from crank sensor & blue from cam.

At the computer - Looks like connector "C"
Pin 24 - White - Shared power
Pin 16 - Orange - Crank output
Pin 15 - Blue - Cam Output

Signal should be checked at the orange & blue wires with a scope.

Wiring diagram for the ECU is 6 pages. I'll see if I can find an online source to link you to.

ECU wiring diagram - Thanks BBB Industries

I checked the crank sensor wheel and it looks new, no signs of any damage.

Looks new, like it is new?

Maybe replaced with the wrong one? Could it be installed incorrectly? You still have to consider the cam also.

Do you have voltage at the cam & crank sensors? 5V Reference?

If so, your going to have to look at the cam & crank correlation.

Have you checked codes? Do you have any live data PIDS for cam/crank sensors?

It's really hard to help without being there. Please address all the suggestions before responding back.

Do you have access to a scope?

To add to arbez's post here. What parts have been replaced here so far? The new one mentioned also had me thinking that something might be the right part or installed incorrectly.