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No voltage coming out from relay box

  • Antorozco1
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7 years 2 months ago - 7 years 2 months ago #27389 by Antorozco1
No voltage coming out from relay box was created by Antorozco1
I have a Acura 07 TL type S 3.5L
Sports mode doesn’t work it shift automatically even in manual ( it’s an automatic transmission by the way) . Has anyone come across this issue? ...I’ve noticed with the scanner I can read the commands to upshift and downshift but it doesn’t read from my paddle shift on my steering wheel only from the regular stick. The pcm is a power switched circuit and the shifter grounds the circuit. I’ve noticed I do not have power coming out of my pcm on that circuit from the upshift and downshift. I changed the underdash fuse relay box and still no power from relay box and pcm. No codes are present either transmission shifts fine. I’ll post the circuit design.
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Last edit: 7 years 2 months ago by Antorozco1.

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7 years 2 months ago #27421 by Valessilo
Replied by Valessilo on topic No voltage coming out from relay box
Just to be clear, you backprobed at the PCM at D15 and D17, with the ign on and shift to M and no voltage?

Do you have continuity to ground at D15 and D17 when you close the switch inputs from the steering wheel?

And you found a power feed issue going to the PCM?

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