VQ35DE 350z Coolant Temp Sensor Settings

General support questions and announcements for MS3. See also MS3 manuals.

Moderators: jsmcortina, muythaibxr

Post Reply
supakat
MS/Extra Newbie
Posts: 27
Joined: Thu May 14, 2015 6:00 am

VQ35DE 350z Coolant Temp Sensor Settings

Post by supakat »

Per the FSM, I have these values but I am unable to find the Bias Resistor Value (Ohms) in order to calibrate my CTS.

Engine coolant temperature °C (°F) Resistance kΩ
10 (14)---------------------------------------7.0 - 11.4
20 (68)---------------------------------------2.1 - 2.9
50 (122)--------------------------------------0.68 - 1.00
90 (194)--------------------------------------0.236 - 0.260

Does anyone have this value or know how to calculate?

I did find this thread. http://www.msefi.com/viewtopic.php?f=38&t=33787 but I was under the assumption that the sensor has a built in resistor.

Thanks....
supakat
MS/Extra Newbie
Posts: 27
Joined: Thu May 14, 2015 6:00 am

Re: VQ35DE 350z Coolant Temp Sensor Settings

Post by supakat »

I did find this thread: http://www.msextra.com/forums/viewtopic ... 31&t=44121

The bias resistors for the temperature sensors are R4 and R7 (for both the v3.0 and v3.57 boards), and they should be 2.49k ohm resistors.

I purchased an assembled MS3x/V3.57. So this answered my question unless someone says differently.
supakat
MS/Extra Newbie
Posts: 27
Joined: Thu May 14, 2015 6:00 am

Re: VQ35DE 350z Coolant Temp Sensor Settings

Post by supakat »

Just in case anyone sees this...the sensor is a standard 2 wire thermistor and the values are the same as a 93 KA24DE CTS.

bias: 2490 ohms
68* F = 2500 ohms
94* F = 250 ohms
230* F = 145 ohms
Post Reply