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View Full Version : Setting RB20 TPS Ohm measurements?


TougeSR20Kid
07-15-2015, 06:01 PM
So I'll stop you before you revert to the typical "search noob" response, I did. On here and on Nico and on various other 240 forums.

So with the TPS the only thing that I could find were the voltage values however I've personally never used voltage measurements for setting the TPS sensor. Every time I've had to do this for work it has been using a gapping tool (for those not familiar its the same one used to adjust valves, not spark plugs) and measuring the ohms (resistance) with the gapper in place and w/out the gapper in place (between the throttle body and the throttle pulley stop).

Anyways before we get carried away I need to know the resistance measurements for setting the TPS and also if anyone might know the size gapping tool used for the RB20det. I did read somewhere that someone said to put a matchbook cover in that spot to set the voltage values, sorry this is not precise so I would like the actual size tool if anyone can help.

Much appreciated, cheers!

dbeiler
07-16-2015, 01:36 PM
First, there are two connectors on the throttle body. One for the throttle valve switch. One for the throttle position sensor.

Resistance values are used to verify the operation of the throttle valve switch.
Voltage values are used to set the throttle position sensor.

The connector directly on the TPS is actually the throttle valve switch. The TVS is simply a 2-pole continuity switch used to inform the ECU if throttle is open or closed. It doesn't read actual position. TVS is kinda pointless; many people don't even use it.

The second connector, attached to the TPS by a short 1" wire harness, is the throttle position sensor. The TPS receives 5v operating power from the ECU. This power is then fed back to the ECU in the form of 0.4v to 5v depending on exact throttle position. Closed throttle should read 0.4v. Opening the throttle will increase the output voltage (in direct relation to the actual throttle position) to a peak of 5v at full throttle.

TougeSR20Kid
07-16-2015, 03:16 PM
Ok, I was aware of the two different connectors but thankyou for the clarification. So you set the TPS location "clocking" by the voltage measurements and its not set like your standard Toyota or Subaru? Whats happening is the car is throwing a code 43 (throttle position) and since the idle is a tad bit high I was just under the assumption that maybe the TPS was clocked wrong

qigunblop
07-17-2015, 06:55 AM
Opening the throttle will increase the output voltage to a peak of 5v at full throttle.http://goo.gl/feCCP2