TPS Connector Wiring
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
TPS Connector Wiring
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
Porsche 928 track car - Chevy 350 TPI, 24 lbs injectors, mild cam, 7-pin HEI, MSIIv3.0 2.905
First time MS'er...
First time MS'er...
Re: TPS Connector Wiring
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.
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.
Dave P, London UK.
Rover V-8
MSII V3
EDIS
Tech Edge Wideband
Rover V-8
MSII V3
EDIS
Tech Edge Wideband
Re: TPS Connector Wiring
Many thanks!
Porsche 928 track car - Chevy 350 TPI, 24 lbs injectors, mild cam, 7-pin HEI, MSIIv3.0 2.905
First time MS'er...
First time MS'er...