Gear Indicator

[qha_vn]

anybody thinks that we can get kind of signals from the tranny that indicates the current gear No.

in some car like Mazda 3 AT, there is a gear number indicator says 1,2,3,4...etc when the tranny shift automatically from 1 to another. looking to the number we know that it is running at which gear and when it shifts to another, quite useful huh?

any thoughts?

[qha_vn]

well, i read the repair manual for A340E automatic tranny on 1UZFE. this is quite simple to achieve

if you connect a voltmeter to terminal TT (+) and E1 (-) the volt changes will indicate gear position as in table below

Gear position/ Terminal TT output voltage

1st gear/ below 0.5v

2nd gear/ 1.5-2.6v

3rd/ 3.5-4.6

O/D/ 5.5-6.9

with some skills on electronics, we can make the output human readable

[pishta]

well, i read the repair manual for A340E automatic tranny on 1UZFE. this is quite simple to achieve

if you connect a voltmeter to terminal TT (+) and E1 (-) the volt changes will indicate gear position as in table below

Gear position/ Terminal TT output voltage

1st gear/ below 0.5v

2nd gear/ 1.5-2.6v

3rd/ 3.5-4.6

O/D/ 5.5-6.9

with some skills on electronics, we can make the output human readable

Use a muti-segment LED voltmeter that measures .1v to 6V and has maybe 4 LED's Or a small analog meter that has a new scale printed showing you what gear you are in as it relates to volts.