Hooking up gauge to VSS 4l60e
#1
Hooking up gauge to VSS 4l60e
Just did a Dakota Digital VHX gauge swap on my Chevelle. I though I could just piggy back the VSS signal wire to the trans near the sensor. It's working on the gauge but now the car is throwing a "VSS signal low voltage" and the transmission will not properly shift itself.
I immediately turned around and parked it.
Is there anything I could do to fix it as is or is there a better way it needs to be hooked up? Is there a pin out on the pcm or does it function stock gauges through a separate body harness or something?
I immediately turned around and parked it.
Is there anything I could do to fix it as is or is there a better way it needs to be hooked up? Is there a pin out on the pcm or does it function stock gauges through a separate body harness or something?
#3
Moderator
Yes, the PCM has a Speedometer out signal.
Tell me what year your PCM is and I or someone else will have the doco for it.
Tell me what year your PCM is and I or someone else will have the doco for it.
Last edited by mrvedit; 03-18-2013 at 12:56 PM.
#5
EDIT: on my car the correct pin was Red 55, green with white stripe wire
I've been searching and it seems like the best answer I can get is I did it wrong and it's causing the problem and the solution is to get my needed signal from the PCM on the Red C2 plug in pin #50 which is a green/white VSS out
I've been searching and it seems like the best answer I can get is I did it wrong and it's causing the problem and the solution is to get my needed signal from the PCM on the Red C2 plug in pin #50 which is a green/white VSS out
Last edited by thunderstruck507; 03-19-2013 at 09:24 AM.
#6
Moderator
BTW - If convenient, I would suggest switching to a 2002 PCM which is pinout compatible. I don't remember all the advantages that have been mentioned in the tuning section on this forum, but it is generally preferred.
For me one advantage is that the 2002 lets you log twice as many parameters simultaneously as earlier ones. If you plan to do a lot of tuning yourself, that is a big advantage.
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#8
Moderator
I first had a '98 PCM, but changed last fall to a '02 which required moving all the pins. I bought an extra set of connectors so that I could move the wires one by one.
#9
Could it be an early 99 issue? It required EFI live credits to tune it (97-98 do not) and I have tuned 98s for 2 friends and the tables are a good bit different in them.
Unless when I sent to pcm off to be tuned by wait4me originally the newer operating system could be loaded into it? I did not think that was possible. I am almost certain it lists itself in EFI live as 99 Firebird. I have also fired the car on another supposed 99+ style pcm before, but did not drive it.
Unless when I sent to pcm off to be tuned by wait4me originally the newer operating system could be loaded into it? I did not think that was possible. I am almost certain it lists itself in EFI live as 99 Firebird. I have also fired the car on another supposed 99+ style pcm before, but did not drive it.