TEMS re-wire for manual control

[gottadiesel]

I am sorry to wear out the discussion on TEMS... but I have seen several posts while searching under "TEMS" that is feasible to manually command settings from Normal/Sport/Firm by creating a short between different sets of input connections to the TEMS controller.

So my question is, does anyway have that definitive information and is able to share it? I would like to know what normal connectivity is on the connector, then which pins need to be shorted to manually command each position, as I will create my own manual control box.

What I have not done though is look at schematic in the TRSM, but it is not here right now, as I am working on my car in Father-in-laws shop, so can not reference at the moment. If this information can be determined by tracing out schematic, then just say so and I will do it tomorrow, but if not, I would appreciate someone sharing this information.

Thanks

 

[TurboStreetCar]

http://www.cygnusx1.net/Supra/Library/TEWD/MK3/manual.aspx?S=Main&P=114

 

[gottadiesel]

Thanks for posting the link, one night I took the time to print the entire manual off, but like I said it is in the car which is not at home...

Ok looks like I have some choices, if anyone else has tried to to such a thing, chime in and let me know how it went, but I am not looking for a lot of choices, so I am thinking I will leave switch as it is, but when I am in sport mode, add a toggle inside somewhere that would emulate the speed sensor input B1 on the TEMS computer and it would activate the Firm mode until shut off.

Any thoughts on that, is it better to use a different input perhaps???

Thanks

 

[hhsuperwhite90]

Here you go! HTH
http://www.supras.com/06/techcenter/display.php?QID=44

 

[gottadiesel]

Beautiful - Thank You!

 

[Poodles]

...or you can get an HKS TEMS controller.

 

[isnms]

1. The SOGI write-up - check
   
2. The HKS TEMS controller - check

Those are the two common options.

Add my info:

The mod is effectively performing the steering sensor system check
http://www.cygnusx1.net/supra/library/TSRM/fa/FA_39.html
Test this way:
jumper Ts & E1
TEMS switch Normal=both outside leds will flash
TEMS switch Sport= all three light solid

with sport and override switch on, it will stay in firm mode.

I think we found, back before the hack., it can be done all inside the cab.
i don't remember if anyone wired it up this way to confirm it though.

• use a two position switch i.e. an on/off switch.
• ground one side.
• use other side to tap the passenger kick panel, connector B1, pin 14, Violet wire.
- or possibly passenger kick panel, connector O1, pin 14 Violet wire.

reference:
http://www.cygnusx1.net/supra/library/Wiring/pages/Page_115.html
http://www.cygnusx1.net/supra/library/Wiring/pages/Page_028.html
http://www.cygnusx1.net/supra/library/Wiring/pages/Page_030.html



i ran my wires through the fire wall, and did it the old SOGI: TEMS Firm Override, Cockpit controlled FIRM mode way, before searching this way out.
i also replaced my goofy coin holder on the instrument panel with a second fog light switch to control mine.

 

[gottadiesel]

Thanks for additional info, I will investigate keeping all in the cab and let you know how it all works out... will probably be a month or so, just pulling motor now, so have plenty of other work to do first...

Thanks!

 

[MikesFixedRoof]

I just recently decided to try this mod, through the old SOGI method. But of course, I just wasn't satisfied with a simple on off switch. So I bought an LED green illuminated on/off toggle switch at the auto parts store (lights up green in the on position) the light is a perfect match for the TEMS indicator lights. I just can't believe how much more tricky the mod becomes with a lighted (3 terminal) switch. I must have tried it a dozen times, I can't figure out how to get the switch to light up AND work the mod simultaneously. All I get is either or (light works but no mod, or mod works but no light). I love this switch but at this point I think I just want the mod to work.

 

[gottadiesel]

I just recently decided to try this mod, through the old SOGI method. But of course, I just wasn't satisfied with a simple on off switch. So I bought an LED green illuminated on/off toggle switch at the auto parts store (lights up green in the on position) the light is a perfect match for the TEMS indicator lights. I just can't believe how much more tricky the mod becomes with a lighted (3 terminal) switch. I must have tried it a dozen times, I can't figure out how to get the switch to light up AND work the mod simultaneously. All I get is either or (light works but no mod, or mod works but no light). I love this switch but at this point I think I just want the mod to work.

For ease of wiring, I did end up just following the SOGI method and used a Stock Fog-Light switch in place of the coin holder... IT works well, I generally always run in that mode unless I end up on a rough road... then again I know that my stock suspension is probably wore... saving for coil-overs still...

In regards to your light situation, you need a different style of switch, as I would make 100% positive that you are isolating voltage for your indicator light from the dry contact making connection to trigger the tems input...

When mine is one, then all 3 lights for the TEMS are on, so I was not worried about having an indicator light myself...

 

[MikesFixedRoof]

For ease of wiring, I did end up just following the SOGI method and used a Stock Fog-Light switch in place of the coin holder... IT works well, I generally always run in that mode unless I end up on a rough road... then again I know that my stock suspension is probably wore... saving for coil-overs still...

In regards to your light situation, you need a different style of switch, as I would make 100% positive that you are isolating voltage for your indicator light from the dry contact making connection to trigger the tems input...

When mine is one, then all 3 lights for the TEMS are on, so I was not worried about having an indicator light myself...

Yea, It looks that way. I mean I can still use the switch I have- It just won't light up is all. Oh well. Thanks for your help dude. Yesterday I just put a little jumper wire between the 2 terminals in the diag block before I went for a little drive to see if there's any noticeable difference in how the car drove with it set on Firm (3 lights). And yes, I definitely feel a difference. still not overly stiff, but stiffer than Sport. Too bad it still rides high as a kite stock :/ . As far as I know my suspension is in decent shape, car always rides nice. Now all I need is a set of springs