MSefi.com read only forum (Jan.15,2018)

quick question about my DYI autotune TPS connector. I do see an A, B and C on the connector. I'm trying to match the wiring up to the wiring on my relay board. Can you tell me which coorisponds to Vref, TSP and ground? Thanks! Bill

Most of the aftermarket ones I've seen are :-
Red: vref
Black: ground
Green: signal out.

However, it's easy to work out if those colours aren't the same.

Turn the pot to about half way, and with a DVM set to resistance measure between two wires until you find the largest reading - about 5000 ohms. Usually the outer pair of wires, if three in line. Note the colours. These will be Vref and ground.

With the pot in the throttle closed position, measure between the other terminal (output) and the two you've identified. The low reading - near zero ohms - will be the ground. The high reading - near 5000 ohms - will be the Vref.

Some pots can fit the throttle spindle either way round - so check after installation that the signal to ground reads low ohms with the throttle closed, and gradually increases to the maximum as it's opened.

Many thanks!