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May 12, 2023

R34 MFD - Multi Function Display Self Diagnosis and Normal to Vspec conversion

R34 GT-R for sale at Toprank Global. Buy and store until it turns 25 years old.
R34 GT-R for sale at Toprank Global. Buy and store until it turns 25 years old. 

Way back in the 90's, the R34 GT-R was one of the first cars to get a color digital multi function display(MFD). While common place these days, in 1999 it was very cool.   There were two different setups/displays, although it does actually get a little more complicated than that. There are two parts to the MFD the screen itself, and the boards that drive the screen.  There are early and late screens. There is also a NISMO version of the MFD, that has boards, lap timer, RS232 connector, and shows G sensor readings. Also a 2 bar map sensor/display on the Version 2. 


This is an R34 Vspec screen. Notice the EXH-TEMP and INT- TEMP. The non Vspecs didn't show these two rows. However, its possible to trick the MFD into showing these two rows. The intercooler temp sensor is on the early cars, but the EGT sensor is not. 

How to use the R34 MFD with English translations



R34 MFD Self diagnostic procedure 


R34 MFD Self diagnostic procedure
R34 MFD Self diagnostic procedure 

Available in the R34 service manual supplement. 

How to make the normal R34 MFD read all 7 sensors


How to make the normal R34 MFD read all 7 sensors


R34 MFD on Facebook posted information on how to make the MFD show all 7 sensors here.

Ground pin#45 or connect the 2 EGT sensor pins together (in engine compartment). The EGT sensor is normally located on the rear turbo outlet/ oxygen sensor housing. 


R34 Multi Function Display wiring diagram

R34 Multi Function Display wiring diagram
R34 Multi Function Display wiring diagram




Nismo R34 MFD



The Nismo MFD is discontinued. If you find/see them used now, you will see them in the $5000 and up range. 

Nengun has some great information on this discontinued part. 

  • 2371A-RSR48-V does not include exhaust temperature sensor as this came standard with V-Spec, V-Spec II, Nur, N1 and M-Spec models.
  • 2371B-RSR48 includes exhaust temperature sensor (22740-AA300) as this was not included with standard models.
  • OEM EGT goes here in an R34 GT-R. Exhaust temperature sensor (22740-AA300)

  • Enhances the standard MFD display with more features and functions
  • Increases boost meter from 1.2 to 2.0 Bar
  • Increases engine oil temperature range up to 150C from 70C
  • Added RPM engine rotation function
  • Front-Back G and Lateral G added
  • Additional measurements for data logging
  • Full data logging and analysis with included software

  • Kit Includes:

  • 2x circuit board
  • Lap Switch and Harness
  • 2x RS232C cables
  • High Precision Boost sensor up to 2.0 Bar
  • Exhaust Temperature sensor for standard models
  • Data Acquisition Software
  • MFD Analyse System Data Analysis Software


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