Hello im working and discovering my rs3 2003 1300 and even if the engine is totally cold I have the alert on dash "wt high"
i suspected the temp sensor but even unplugged or shunted its same. can you help me ? too i fond near the passenger foots an ecu partially wired ?
Hi @nico-fr-18, the device you found near the passenger foot is part of an old Pi Data System. The Pi System typically ties into all of the cars sensors and outputs the information on a small dash near the driver. It does not typically feed the Aim dash that you have pictured. What chassis number is your car? It appears that your car originally came with the optional Pi Data system and at some point someone upgraded to the Aim days. Hopefully when they upgraded to the Aim dash they installed a new harness and didn't use parts of the Pi Harness. The coolant temperature sensor that you need is installed on the swirl pot on the left side of the engine bay (see the attached picture). You can test that sensor to make sure it is working properly with a ohm meter. You can also check the wire run to see how that wire ties into the aim dash. Or you can run a new wire from the aim harness to the water temp sensor. I hope this helps.
Hi its chassis 0003 I imagine my car have been upgraded with a jenvey injection and this dashboard. This could explain why I have many smalls wires not connected on the harness.
I dont have sensors on the WT tank. I found a thermo switch near the radiator and another sensor on a WT hose. I will make some pictures. I imagine this have been modified by the last owner and he didnt made the setting operation in the dashboard with a computer. Every day I learn something new. Thanks for your precious help.
I see on this video that the WT High signal is blinking too ! maybe normal ?
HI I have done some research and my AIM MXL strada use PT100 4 wires as temp sensor.
on the wiring datas the temp chanel is chanel 4 and should be corresponding to white/red/black/blue wires . For an unknown reason the previous owner during his unfinished restauration replaced the temp sensors with standard 2 wire sensor and with some used spare parts I found this used sensor too (i dont know tech datas).
But my problem now is that the wires are cut and more again, the 4 wires are not the same colour as they should be (they are white /yello/brawn/ green) So now im not able to say if the new sensor is correctly wired and im not able to retrofit with a PT100 because I dont know who is who.
Can you tell me how to connect the standard sensor ? or to identify the original wiring ? I see that the confiuguration in the AIM software wasnt done too so it cant work fine.. thanks for your help !
Hi I compared the wiring with the oil temp sensor and now i can say that:
wiring side of car wirind side of sensor
yellow----------------------->Red
white------------------------>white
-brown---------------------->black
-green---------------------->blue
I learned too that:
The MXL Strada system doe snot support 2 wire sensor configurations.
The wirings that I have shared is not the conventional AIM wiring .
I will need to add a binder 719 connection to the car side harness to use the Pt100 sensor. If you are not going to add the binder connection then you will need to create a 2000 ohm pull up circuit to replicated the pull up circuit in our PT100 sensor connector before the hardware will work as expected.
