Hey everyone,
I'm Frank from MotorvateDIY (https://www.youtube.com/motorvatediy)

I am developing a plug and play CAN Bus module that will allow the G35 factory gauges to work with a HR35, VHR37 and VK56 engine swap.
As part of the reverse engineering process, I fully disassemble and document the circuit board.
However, as I now know, the needles need to be in a specific position for them to be accurate. (This is different than the G37 cluster)

Update: You can calibrate the gauges by putting the gauge cluster in diagnostic mode and press the A/B trip button. See next post.
Soooo, does anyone have any tips to position the needles with the cluster out of the car?

I am going to be recording the CAN bus of a 04 G35 on Friday and with that, I will be able to fire the RPM & speedo CAN bus message for a specific speed and position the needles there... I was hoping not having to wait 3 days and maybe get some tips here.

Thanks in advance!

 

Small update:
You can calibrate the gauges without a car. In the FSM, section DI, page 15 it shows how to put the gauge cluster into diagnostics, and by pressing the trip A/B button, all the gauges move to almost horizontal. If they are not, you can gently spin the needle clockwise or counter clockwise until the gauge motor stop (this is not the pin on the face of the gauges) is contacted. You may have to lift the needle over the gauge face pin/needle resting pin. Then gently continue to move the needle. Since the motor shaft is at the end of its travel, it won't move, but the needle can, so it is being repositioned without removing the needle.

Here are my results:




Now the CAN bus research continues...
Here I am sending the CAN bus message for 1,000 RPM and a coolant temp of 60C/140F, door open and automatic transmission is in park.