Throttle position sensor

sideways danny · #1 04-01-2009, 18:25

Quote:

Originally Posted by CNHSS1

i always thought the s12 TPS was a throttle position SWITCH rather than throttle position SENSOR (although may be wrong). the s13 TPS is a sensor iirc.

true..auto has extra bits to run the gearbox though

silviagod · #2 04-01-2009, 18:30

wiring the SAFC without a throttle sensor signal is only half the job as you can't set the high throttle RPM values so you can make the car right for cruising but not driving hard, or you can set it for driving hard and end up never passing a petrol station.

sideways danny · #3 04-01-2009, 18:49

ahh, you're using one of the newer sort. I fitted a 5 dial type

I'd say find a TPS from an auto s13, the 7v signal wire you've identified is I think the wrong one for this.

silviagod · #4 04-01-2009, 19:04

The remaining two wires give a constant 0 Volts and 12 Volts.

wacomuk · #5 05-01-2009, 09:18

Paul set it for HARD DRIVING! you know you want to

silviagod · #6 05-01-2009, 09:29

I am waiting to see if Apexi email me back if not I may try to make a potential divider with some resistors and hope it doesn't effect the signal doing to the automatic transmission control unit.

30psi · #7 06-01-2009, 15:58

The S12 auto TPS is simply 2 switches in one. It provides a full throttle signal and an idle signal, with no variance in between.

If you use an S13 one, it has an additional plug come from the rear of the the unit then provides the variable signal.

Only issue, is that you may need to supply 5v (guess) to it for the signal to be similar to how it would be on an S13.

The answers to your problem are in the S13 service manual. Rather than look at the wiring diagrams if you look at the tests for the TPS it should show the switching side and the potentiometer side of things.