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Power Button Not Working (auto trans)

Dvaughan10
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Dvaughan10 Newbie

Dvaughan10

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Looking for guidance on this issue im having. I have a R32 GTS4 with an RB20DET that has an automatic transmission.

The issue I am having is that the power button, near the automatic shifter, is not illuminating near the gauge cluster. The power button light is needed to do the automatic transmission diagnostics check. Basically my transmission is stuck in 3rd gear. I can manually up shit and down shift 1st and 2nd and it won’t upshift to 4th or overdrive. I really need that power button light to work so I can run the check to see what the issue is. 

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https://www.sau.com.au/forums/topic/485317-power-button-not-working-auto-trans/
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GTSBoy Grand Master

GTSBoy

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Given that you appear to have a problem with at least one of the inputs required to put the TCU into diag mode, it is probably better to not bother to do diagnostics that way. Just go to a workshop that has a diagnostics terminal capable of talking to Nissan Consult stuff and interrogate the TCU directly. Going to be so much easier. You will be able to see directly if the TCU can even see the power button being pushed.

The fact that it won't change into 4th suggests that you have a larger problem than just the power button, and there may in fact be no problem with the power button. The TCU might be ignoring it because of this problem.

Of course, if you are going to complain about having to go to a workshop and pay someone to do this for you, then you can always start at the beginning (the wiring diagram) and use a multimeter to see if the button works at all (at the button) and/or at the TCU end of the wires. You might find the switch mech has broken or is dirty. You might find a broken wire. Etc.

Dvaughan10 Newbie

Dvaughan10

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@GTSBoy thank you for the reply! I will try to find someone local that can run the Nissan Consult to see what the issue is. 

It’s all odd as it wasn’t working right when I picked it up from the port but randomly worked one of the times I took it for a test drive and shifted beautifully. 

Maybe I’ll watch some videos on how to test wires for bad grounds, breaks, etc to try and see if I can find the issue as well.  

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