Need Help With Shift Selector INputs

A forum for discussing applications and implementations of the MegaShift transmission controller code for the GPIO from B&G. This can control up to 8-speeds and 6 shift solenoids (plus a 16x9 table for controlling a PWM line pressure valve). It has manual and fully automatic modes (16x9 load x speed table), with under and over rev-limit protection, and full data logging of all inputs and outputs (among many other abilities). A TransStim to test your completed board is also available.
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shaodome
Posts: 58
Joined: Thu Aug 22, 2013 6:28 am

Need Help With Shift Selector INputs

Post by shaodome »

So the Toyota IS300 has separate wires for EACH shifter selection that all go high (12v). For the standard 4 inputs on the Megashift I built simple voltage dividers to bring it down to something more PCB friendly, but the wiring of it has me a bit confused. The toyota ECU has the following shift selector options:

P
R
N
D
2
L

All of which have their OWN wire that goes high when in gear. The others remain low. They also are responsible for running the gear position indicator on the dash. I'm not exactly sure how to configure this?

Right now I have it wired with only 3 inputs (all I built so far).

P = all low

R = 3 High, rest low

N = not configured

D = 1 high, rest low

2 = 2 high, rest low

L = not configured

I've made sure that none of them are the same.
shaodome
Posts: 58
Joined: Thu Aug 22, 2013 6:28 am

Re: Need Help With Shift Selector INputs

Post by shaodome »

Also, when I put the car in DRIVE, what input pattern am I looking for?
Bernard Fife
Posts: 1696
Joined: Fri Apr 04, 2008 1:28 pm

Re: Need Help With Shift Selector INputs

Post by Bernard Fife »

shaodome,

You only absolutely need PNR. You can shift to the lower forward gears whenever in drive by using the shift buttons (this is the way the code expects you to shift, using the lever can cause all sort of niggling problems, like indeterminate shift lever states).

Lance.
"Never wrestle with pigs. You both get dirty and the pig likes it." - George Bernard Shaw
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