Verifying Trans Fluid Temp sensor function
Thread Starter
Le Mans Master
Joined: May 2006
Posts: 7,869
Likes: 252
From: Hillsboro OR
Verifying Trans Fluid Temp sensor function
I converted my '03 A4 to a RPM Stage V MN12. My A4 was getting too hot on the track.
I asked RPM to install the TFT sensor in my MN12. How do I verify the sensor, and the wires I added to my wiring harness for this function are working correctly? I am getting no codes. I have tracked the car once already.
If I temporarily short the TFT High Signal (to GND, with key on) will it trigger the DIC warning "TRANS TEMP HIGH"?
I ask because I am sensetive to the trans temp issue and I don't want to burn up this new one.
Thanks in advance.
I asked RPM to install the TFT sensor in my MN12. How do I verify the sensor, and the wires I added to my wiring harness for this function are working correctly? I am getting no codes. I have tracked the car once already.
If I temporarily short the TFT High Signal (to GND, with key on) will it trigger the DIC warning "TRANS TEMP HIGH"?
I ask because I am sensetive to the trans temp issue and I don't want to burn up this new one.
Thanks in advance.
Last edited by Bluefire; May 4, 2014 at 04:34 PM.
Thread Starter
Le Mans Master
Joined: May 2006
Posts: 7,869
Likes: 252
From: Hillsboro OR
I think I found my answer. I got cozy with the Service Manual and found the DTC code P0712 TFT sensor. It activates the "TRANS TEMP HIGH" on the DIC if the fluid temp is measured > 302F (or lower than 47 ohms) for more than 10 Seconds.
This is per the Temp vs. Resistance table in the Engine Controls section.
So... I should be able to measure ~ 2.5K - 3K ohms at ambient temp (per the table) at the pins going into the PCM for the TFT sensor. That will verify the sensor and wiring functionality.
This is per the Temp vs. Resistance table in the Engine Controls section.
So... I should be able to measure ~ 2.5K - 3K ohms at ambient temp (per the table) at the pins going into the PCM for the TFT sensor. That will verify the sensor and wiring functionality.
