ls2/4l75e not locking up in tune looks ok for settings to me but could be wrong. commanding lock up through scanner works and lockups convertor. also noticed brake status stays applied while engine running and does not change, brake switch is good checked it. and with ignition on only brake status works normally as it should when pressing/ releasing brake. any thing in tune would cause this status issue?
truckspeedtune.hpt
The E38 and T42 calibrations are for a 2009 truck (4.8L 4L65). Is the actual drive train from this same donor vehicle?
The TCM is expecting inputs from an ISS and an internal (inside the transmission) gear position switch - which means that the A4 transmission must be a 2009 or newer version.
Did you rework the wiring harness yourself, or is it from an aftermarket company?
How have you wired the brake inputs to the ECM and TCM?
Yes they are wired in the harnessOriginally Posted by Jon S.
That’s awesome .... but doesn’t answer how the brake inputs are wired (or any of the other questions).
If you want help, you need to provide specific details.
Brake switch is wired to pin 9 on ecm x1 and pin 42 on Tcm. When brake is applied it sends 12v.
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