ST185 3SGTE - Code 14

[Boosted_162]

Im trying to get my RC going. When its been left a while it will start, and idle fine for a while then will cut out. The wont start again. Only code coming up is 14 which is:

14 Ignition Signal
Diagnosis
* No "IGF" signal to ECU "A" times in succession.
A = 6-8 (7M-GE)
A= 3 (7M-GTE)
Trouble Area
* Igniter and ignition coil circuit
* Igniter and ignition coil
* ECU

Now i have replaced the igniter and coil today, and no luck. What should i look for next? Gunna try track down a RC ecu and try it out (Still got yours Cliff?)

Thanks

[RS13]

Sounds like your fuel pump is knackered, or you've got a fuel blockage somewhere.

[Boosted_162]

Sounds like your fuel pump is knackered, or you've got a fuel blockage somewhere.

I can smell fuel after its been cranking. Judging by the code id assume theres no spark? Oh and also making the fuel pump run (fp and b+) doesnt change anything.

[RS13]

Seems odd that the ignitor would fail in that way, normally an ignitor works or it doesn't, (coming from experience with Nissans) as well as the stable idle before it dies.. hmm.

At least try starting it, if it doesn't start, I'd pull the fuel line off and check for flow. Does it die any faster if you give it throttle?

[Boosted_162]

Seems odd that the ignitor would fail in that way, normally an ignitor works or it doesn't, (coming from experience with Nissans) as well as the stable idle before it dies.. hmm.

At least try starting it, if it doesn't start, I'd pull the fuel line off and check for flow. Does it die any faster if you give it throttle?

When it does actually start (only when its been sitting a while) it will run and drive perfectly. Then it will just cut out and wont start again. Turns over with heaps of power. Im gunna borrow Cliffs ECU sometime and see if that chages things.

[RS13]

Ah ok. Well its' sure a curly one! Good luck man, I hope it is a simple ECU fault.

[Boosted_162]

Ah ok. Well its' sure a curly one! Good luck man, I hope it is a simple ECU fault.

I dunno if i want it to be a ecu fault, RC parts are bloody hard to find!

[fivebob]

How did you check the codes?

Did you turn the ignition on before bridging the check terminals, or after?

[Boosted_162]

How did you check the codes?

Did you turn the ignition on before bridging the check terminals, or after?

Bridge terminals, then turn ignition on. Cleared codes before to be certain.

Have taken ecu out, no signs of anything wrong. But noticed the Defi VSD has been wired into the ecu. Might try unplugging to see if its interfering with the signal.

[fivebob]

How did you check the codes?

Did you turn the ignition on before bridging the check terminals, or after?

Bridge terminals, then turn ignition on. Cleared codes before to be certain.

That will be why you are getting a false code 14 then. The correct procedure is to turn the ignition on then bridge the terminals. Code 14 is transient and not stored in the ECU so it's there when you turn the ECU on, and is cleared soon after.

[Boosted_162]

How did you check the codes?

Did you turn the ignition on before bridging the check terminals, or after?

Bridge terminals, then turn ignition on. Cleared codes before to be certain.

That will be why you are getting a false code 14 then. The correct procedure is to turn the ignition on then bridge the terminals. Code 14 is transient and not stored in the ECU so it's there when you turn the ECU on, and is cleared soon after.

Ok well i went out and tried again.

I put new battery in (so there will be no codes stored). I started it and ran it for a little while, then it started to splutter and die. Throttle couldnt save it. Left ign on "on" so all warning lights were on. Code 14 again.

Unplugged the VSD and it didnt change a thing

Just one thing i remembered. My original ignitor had a slightly different part number. Could that be it? Both other ignitors i had tried were GT4/3SGTE ones. Part numbers are 1 off.

[fivebob]

What year is your GT4,

Part # should either be 89621-12010 for production dates before 9108 or 89621-12050 after that.

[Boosted_162]

Its a 1992. All my igniters are 89621-12050 but the one that came in the car has PHD1 written on it in big letters, and my other 2 have 201 on it. And the Denso numbers are different... 131300-2010 compared to 131300-2011.

[XS1V]

This is very weird, sounds like something heats up then breaks the circuit. This could be in the ECU etc etc as you have said. Can come have a look in the weekend if you like??

Brad

[Boosted_162]

This is very weird, sounds like something heats up then breaks the circuit. This could be in the ECU etc etc as you have said. Can come have a look in the weekend if you like??

Brad

Sure, im running out of ideas quick! Gunna try Cliff's ECU, but other than that i dont know!

[matt dunn]

My guess for a toyota would be,

Not ECU,
Not igniter,

Coil or wiring.


The igniter recieves the IGT signal from the ECU and fires the coil,

and when it sees the high spike in the coil -ve you get when spark occours it triggers back on IGF to say it's fired.

No power to the coil, or faulty coil will give that code, as you dont get the spike.

[Boosted_162]

My guess for a toyota would be,

Not ECU,
Not igniter,

Coil or wiring.


The igniter recieves the IGT signal from the ECU and fires the coil,

and when it sees the high spike in the coil -ve you get when spark occours it triggers back on IGF to say it's fired.

No power to the coil, or faulty coil will give that code, as you dont get the spike.

So you'd say to check/replace the coil, and check the plug and wiring for it?

Oh and does the coil earth through the bracket like the igniter does? (i think the igniter does?)

[matt dunn]

So you'd say to check/replace the coil, and check the plug and wiring for it?

Oh and does the coil earth through the bracket like the igniter does? (i think the igniter does?)

Yes

The igniter earths the coil, so the main coil current goes through the igniter earth which is the case,

so check the igniter is bolted to earth and is tight.

[Boosted_162]

Its the ECU.

Cliff was just here, so we put his ECU in. Ran like a charm, got to operating temp and idled perfect.

Now the hard job of finding an RC ECU....

[Dell'Orto]

PM anth_555, I think he had one, could still have it. Also, you may be able to get it repaired, there is a company in Nelson (and there are probably others) who repair ECU's.