2002 Echo Crank, No Start, No Spark, Immobilizer

[Andrinik]

I've cheked relay twice.
Firstly I've tryed another relay (change relays within relays blocks with same characteristic)
Secondly, I've cheked votage on 2 pin of relay when key in on position (see post 10) It should have 12 V to close working contacts 3 and 5.
So if I had the realy NEW relay - it wouldn't help.

[CTScott]

It's definitely not the relay, as MREL drives the coil and that output of the ECM is not firing up. I had you check the ignition wires as they feed power to the ECM to bring up MREL.

[Andrinik]

Update:
New ecu installed. Numbers on this ecu match totally my ecu.
Efi relay works great. Just after I only insert the key - without key rotation - 12 v on b+ pin of ecu. Check engine light is on. After 1 minute of doing nothing the relay switches off.

But I have one expected problem- immobilizer. This one can't accept the new ecu. And flashing.

So, Some specialists advised to open ecu and install immo part of ecu from old to new ecu.
It's not easy to recognize what exactly part of ecu should be replaced, is it?

[CTScott]

That is the hassle of the immobilizer - if you get a used ECM, you also need the key ECU and key.

You should be able to swap the EEPROM from the old to the new. It will be an 8 pin IC with 93Cnn on it. It will probably be. 93C46 or 93C56.

[CTScott]

Actually the European one might be a Bosch ECM. If it is then the IC is a 25020 or 25040.

[Andrinik]

I opened the ecu and find memory box 25020. At weekend I will place this box from old to new ecu. Thank for your information.
Do you know what exactly immobilizer blocks on Yaris? Sparking plug? Fuel pump?

[CTScott]

Originally Posted by Andrinik

I opened the ecu and find memory box 25020. At weekend I will place this box from old to new ecu. Thank for your information.
Do you know what exactly immobilizer blocks on Yaris? Sparking plug? Fuel pump?

On the 2nd generation Yaris it prevents both fuel and ignition. I suspect that the first generation ones do the same.

[Andrinik]

Replaced immo memory from old to new ecu. Installed ecu. Immo warning light stopped flashing! It's very nice. But anyway I haven't got the ignition spark...
And no fuel injection.
Checked the wire to injectors and find bad connections. Repair this. No effect.

No sparkles, no injections- and I suggested crankshaft position sensor failure. Checked wires and figured out bad connection. Repaired.
Today I saw first time the ignition sparkles!
Unfortunately battery was out. So I will replace battery and continue...

I should to check fuel injections. What is easiest way to do this?

[CTScott]

Originally Posted by Andrinik

Replaced immo memory from old to new ecu. Installed ecu. Immo warning light stopped flashing! It's very nice. But anyway I haven't got the ignition spark...
And no fuel injection.
Checked the wire to injectors and find bad connections. Repair this. No effect.

No sparkles, no injections- and I suggested crankshaft position sensor failure. Checked wires and figured out bad connection. Repaired.
Today I saw first time the ignition sparkles!
Unfortunately battery was out. So I will replace battery and continue...

I should to check fuel injections. What is easiest way to do this?

Wow - Very strange with all the wiring issues.

For checking the injectors, just listening to them click is one way of telling they are alive. Beyond that you need to power them and squirt liquid through them.

[Andrinik]

Thanks to CTScott for real help.
After putting some fuel in input collector engine started!!

So, it was extremely useful advice about memory replacing!