Lexus

The MGF steering I have fitted to my classic car cuts out randomly and just want to monitor various signals to see if anything shows up without being a parts changer, albeit I did try another EPAS ECU, now a G rather than an F
I have also monitored the remote signal source with a scope and it never missed a beat.

You are correct in that I wish to test/setup the torque steer sensor but also its part of a test rig I'm putting together to monitor all functions of the EPAS at one convenient point, eg a test box on the passengers seat, which would probably all be redundant once I get my hands on a PSCAN module.

Would anybody have a Torque Steer Sensor connection plug as per picture with a short length of wiring they could sell me.

This is main harness end, would cover any costs.

Steering not over heavy without assistance, did wonder about being heat related myself but the other day i'd not gone 200 yds and it tripped, but then carried on ok for next 10 mile.

Have attached later and early type wiring diagram that I'd been working from

I've have had both the F series and G series boxes open and the board numbers and layout are identical but have no idea if software is different, also the connections are the same and both series will run in my setup, at the moment i'm running mine with pin 7 disconnected but am still getting an occasional drop out until reset.

These figures are from a bolt on module that does the simulation and not chosen by me, they are as measured from the output of the module.

I have read somewhere that if the ECU see an engine speed of more than 2500 for more than 30 sec with no speed input it will go into fail safe mode so perhaps that's why its set to the equivelent of 2460 RPM on pin 15.
In testing the EPAS will run without a speed input on pin 7.

Don't know which it came from as brought from fleabay but the EPAS ECU is a Series G, I believe part number is 00720, also had same issue with F series EPAS ECU where OBD 11 scanners wont read it.

Not used any that you have listed albeit I have started going through the motions of the purchase and order of a PSCAN interface once the guy has recovered from his illness.
I have tried a few OBD 11 scanners but none seem to have the correct protocol which I believe is IS09141 and as I'm running mine as a stand alone system it may not like it not being OBD 11 compliant.

I have a module attached which produces two square waves at 50% duty cycle at approx 10 volts, one at 82Hz, this feeds into the EPAS on Pin 15 and represents the engine running, the second signal is a variable frequency via a pot and is between 19Hz and 295Hz and feeds into Pin 7 of the EPAS and represents MPH, this pot allows for adjustment of assistance to the steering.