Quote:
Originally Posted by mechman600
Ok. I just had a good hard look at the Toyota shop manual, namely, the electronic transmission controls. It is controlled by the engine ECU, and there are 4 outputs: three shift solenoids and a TC lockup.
It would be nice to come up with an electronic gizmo that overrides the TC lockup output from the ECU. Here's what I'm thinking, using signals from the TPS and VSS:
If vehicle speed is above ~25 km/h and throttle position is below ~25%, my "device" triggers a relay that sends power to the TC lockup. If neither condition is met, the transmission acts normally.
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You have to be careful with added circuitry to keep your ECU from getting strange signals and setting an error code. The check engine light would probably not brighten up your wifes day
