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sherm747

3RZ/Xtreme trigger issue

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Hello, 

Quick brief of the story so far, i had a Vipec v88 on my 3rz powered corolla but have upgraded to a Link Xtreme. I sold the v88 in 2016 and the car has rested until now.I made a new engine harness and purchased the Link Xtreme but found I couldn't just load the tune into the new ecu. So i copied it all over manually and have tested injectors/spark etc. I am getting nothing from the Cam sensor, both the cam and crank triggers are standard other than the crank having a 12t disc instead of standard. The crank signal is working no problem as tested through the Trigger scope and the trigger signal for the crank is turning to yes while cranking.
 

Can someone please run their eye over the trigger settings and maybe give me some things to try?  I have tried a new Cam sensor and have triple checked the wiring, I have the signal wired to trigger 2 and the other side is to sensor/shield. I have attached a photo of the trigger scope and the tune is also attached. 

 

Thank you very much, 

 

Kyle Vance. 

 

Trigger scope.jpg

luxy 13 4 19 420pm.pclr

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There is nothing wrong with your settings, there is definitely no signal from the cam sensor.  

What does it have for a cam sensor - is it inside an old distributor/CAS or is it a dedicated cam sensor.  If you unplug the wiring off the cam sensor and measure the resistance between each pin to ground, is either pin shorted to ground?

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Thanks for the reply, It’s a dedicated cam sensor, one pin/wire shorts to ground the other doesn’t. I assume that’s the shield/Ground wire. Currently one wire goes to trigger 2 and the other is connected to shield/Gnd, is this correct? 

 

The cam sensor is the standard one that triggers off the inlet cam.

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It seems like a wiring problem to me if there is no signal at all coming through.  Another quick test you can do is swap the trig 1/2 pins at the ecu plug.  Then if you get a signal on trig 2 and nothing on trig 1 it confirms wiring.

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Ok great thanks. I have tried that, it did exactly as you said. 

 

Wiring wise i just have trigger 2 going to one side and both the crank and cam grounds joined with the shield into the shield/gnd pin next to the triggers, does this sounds right? 

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It appears the cam sensor signal is being shorted to ground somewhere.  If you unplug the sensor and measure resistance between ground and each of the sensor wires coming from the ecu you should see near zero ohms on one pin and very high resistance on the other.  Can you confirm?

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I’ve just tested as above, had -0.4 on one wire and 46k ohmz on the other. Does this sound right? 

I ran two new wires from the ecu to the sensor and still nothing. I haven’t pulled apart the connector at the sensor end though so tonight I will and make sure they are terminated well etc

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33 minutes ago, sherm747 said:

I’ve just tested as above, had -0.4 on one wire and 46k ohmz on the other. Does this sound right? 

Yep, thats about right.  So are you sure the ground side of the sensor is connected to the ground pin?

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Earlier you said that one of the cam sensor pins had continuity to ground.  Can you confirm that again, it looks like it has a mostly plastic body so its hard to imagine how it would be grounded through the body.

Here's the pinout:

mv2t8o.png

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I checked tonight and the sensor itself Doesn’t have continuity to ground on either side, just the shield/gnd side of the harness does. I’m really stumped on this one. Anything else you can think  of to try? 

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On 4/16/2019 at 2:55 PM, Adamw said:

Earlier you said that one of the cam sensor pins had continuity to ground.  Can you confirm that again, it looks like it has a mostly plastic body so its hard to imagine how it would be grounded through the body.

Here's the pinout:

mv2t8o.png

Do you have any more advice on this? I'm really stuck on this.

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Not really sorry, we have proven the ECU trigger 2 input is working when we swapped the trig 1/2 pins earlier, so assuming there is actually a tooth on the cam and the cam is turning around then it is either the wiring or the sensor - there is nothing else involved.

If you unplug the loom at the ECU end and measure resistance between pins A7 & A9 (gnd & trig 2), do you get the ~1200ohms that the sensor is quoted to be?

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