1993 FZJ80 A442F issue, won't start moving in 1st, but rather 2nd (6 Viewers)

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You're probably not doing anything wrong, but your wire is doing you wrong. You should have consistent resistance across the entier shift solenoid circuit. Where are the endpoints you're measuring from/to? Try at the TCU also. You should the same-ish there.

I think that pigtail is still available. If not, you'll have to make one.
I'm doing S1 and ground and S2 and ground on the plug itself

Screenshot 2025-07-27 at 06-36-48 Document - troubles.pdf.webp
 
You're probably not doing anything wrong, but your wire is doing you wrong. You should have consistent resistance across the entier shift solenoid circuit. Where are the endpoints you're measuring from/to? Try at the TCU also. You should the same-ish there.

I think that pigtail is still available. If not, you'll have to make one.
I'm checking S1 and ground and S2 and ground on the plug itself.

Sorry posted twice

Screenshot 2025-07-27 at 06-36-48 Document - troubles.pdf.webp
 
You're probably not doing anything wrong, but your wire is doing you wrong. You should have consistent resistance across the entier shift solenoid circuit. Where are the endpoints you're measuring from/to? Try at the TCU also. You should the same-ish there.

I think that pigtail is still available. If not, you'll have to make one.
not sure why my browser doesn't display my reply sometimes but i'm going off of the TCU connector diagram on the manual checking S1 and ground and S2 and ground
 
Just for laughs, I'd check the circuit at the TCM, since you're there. But I think you found the problem.

Have you tried battery voltage at the harness connector terminals, as suggested in the manual? You'll need a helper so that one of you can apply voltage and the other can listen for the solenoid. I'll bet you'll find that S2 works fine and S1 is flaky.
 
Just for laughs, I'd check the circuit at the TCM, since you're there. But I think you found the problem.

Have you tried battery voltage at the harness connector terminals, as suggested in the manual? You'll need a helper so that one of you can apply voltage and the other can listen for the solenoid. I'll bet you'll find that S2 works fine and S1 is flaky.
I haven't tried that yet. So just to make sure I do it right, I apply voltage to the S1 and ground, right? And listen?
 
I haven't tried that yet. So just to make sure I do it right, I apply voltage to the S1 and ground, right? And listen?
Yes, that's what the TCU does. You're just bypassing the controller and activating the solenoid yourself. I'm not sure you need a full 12VDC to move the solenoid; a (new) 9V battery might do it. Easier than lugging a group 27 battery around, unless you have a power supply handy.
 

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