Did the Auto to manual swap? want your cruise back?

[dscoobydoo]

Did you do the swap from Auto to Manual and want your cruise control back?
Are you like me and drive enough on the highway to hate not having it?

Well, thanks to my being completely Anal, and the fact that Josh has read the FSM front to back, I have an EASY solution.
( this only works for 92-94 due to the change in wiring from 91-92)

You will need to acquire a cruise control computer from either a NA or Turbo MANUAL Transmission car (92,93,94 all ok).
You will also need to get the lower clutch switch plug and wires from the same vehicle(s) ( there should be a switch that this fits into from your swapping to the manual pedal assemby )


IF YOU USED A 1991 PEDAL ASSEMBY, I CANNOT GUARANTEE THIS PLUG EXISTS BUT IT SHOULD

tools:
8mm socket
10mm socket
Phillips Screwdriver


Remove the glovebox. It is secured by two screws on the bottom.

Remove the lower cross piece that the glove box bolted to.


Remove the right side aluminum support brace.
There will be two or three black screws down the front, a nut underneath, and a large screw under a 1x1 plastic cover piece at the lower right of the dash.



Unplug the two plugs from the bottom of the cruise control computer.
Unscrew the two screws (top and bottom) that secure the cruise computer to the dash frame.

There will be two relays attached to the cruise computer. The black one will be the master relay. You will need to keep this one connected. The other relay ( may be gold and has 2 pins horizontal and 2 vertical) will be the inhibitor relay. Unplug this relay and throw it away.


You will need to run wires from both the Yellow/Blue wire and the Yellow/red wire from the plug that was the inhibitor relay to the clutch relay switch plug.





attach those two wires to the clutch relay switch plug ( does not matter which color to which as the switch is a on/off switch)

re-install in reverse.

===============================================================

The test run showed the cruise worked.
Clutch switch turned it off
brake switch turned it off.
Set/resume/accel and coast all worked.

BUT I DID NOT SEE IF THE NEUTRAL SWITCH TURN OFF WORKED. SO JUST DON'T JAM IT OUT OF GEAR WHILE CRUISE IS ON.


Special thanks to Josh

Drew

[Legacy777]

Drew,

Glad to hear you got things worked out with the cruise control.

The 91 pedal assembly should be the same and use the same clutch switch. The main diference between the 90-91 and 92-94 cruise setups is that the 90-91 uses a separate clutch switch relay while the 92-94 just uses the switching in the cruise computer.

[vrg3]

I don't believe there is a neutral switch turn off function even in stock 5MT cars. That's only on automatics. Seems like it'd be a sensible thing to add, but as you have it you're as good as stock.

[dscoobydoo]

I was unsure if the neutral switch existed in our cars, but to CYA my butt, I posted it that way.

[Legacy777]

The neutral switch on the MT cars is present, but I don't believe it really does much or has any affect on the ECU or cruise.

[vrg3]

It's just used for the ECU; nothing else connects to it. The ECU alters the way it handles ignition timing depending on whether or not you're in gear. That's about it.

[bmxkelowna]

ive done three auto to 5mt swaps now and my cruise has always worked with out doing anything?

[Legacy777]

What years and did you pull out the TCU's?

[bmxkelowna]

92 and two 93's for mine
and a 92 and a 93 wagon for my brother

tcu was removed from the car every time

[Legacy777]

Were they all Canadian cars?

There are some differences in the cruise setup between the US & Canadian cars.

[bmxkelowna]

Were they all Canadian cars?

There are some differences in the cruise setup between the US & Canadian cars.

ya they were all canadian cars

is it a common thing for us cars for the cruise not to work after an auto to 5mt swap?

[Legacy777]

Yeah, the cruise doesn't work after the AT to MT swap. The Canadian cars have a different diode in the cruise wiring, and for whatever reason it appears that the different diode allows the cruise to still work.

[bmxkelowna]

is the diode difference in the cruise computer its self? maybe a canadian cruise computer will help you guys out?

[Legacy777]

No, it's in the wiring. You can see the difference in this diagram. It's connector B95

http://www.surrealmirage.com/subaru/fil ... ntrol2.jpg