Once again, s light, limp

[Truballer328]

Fellas please have a solution..... I have changed the vss, I took the tcu out changed about 5 capacitors and two resistors... I've tried to jump the blue connector and I don't get codes for anything.

Before I worked on the tcu, it would go in to limp mode... 1st and 3rd gear
Now after doing the tcu.... It goes into limp mode.... 2nd and 4th

Any and all input pleassessssseeeee


****** new symptoms--- once it goes into limp mode. No light is on, when I get to a red light and have my foot on the brake, the s light goes on and stays on as long as my foot is on the brake. Once I depress, light goes off????

[F22A1forlife]

This is a very common problem with these cars. I had no s light blinking and it was my shift solenoidons the transmission that were bad on mine. You may want yo try a differnt tcu all together as well. Good luck and keep us posted.

[Binladin]

x2 for a different tcu and solenoids

Maybe check your solder points over… when I did my tcu I slopped some solder halfway onto another by mistake and almost missed it… also my s light blinked all the time while in limp mode when my tcu capacitors were bad, unplugging the tcu for a couple mins to reset it back to normal for a 20min drive and then back into limp mode once again.

[Truballer328]

Where are the solenoids at? Easy to swap? Yeah my solder point are not crossing anywhere. The s light blinks a few times and does not go into limp mode, then eventually s light stays on and it goes into the limp mode. Any suggestions to get a dependable tcu?

[cloudasc]

If your S/D4 light is flashing at you, and then later goes into limp mode, it means you have a code, and your TCU is functioning properly. What you need to do is jump the service connector in the passenger side kick panel, count the flashes, reference the meaning of the counted flashes, and go from there. For information on how to jump the service connector, please read the sticky at the top of this section that says 'READ HERE FIRST'.

[Truballer328]

If your S/D4 light is flashing at you, and then later goes into limp mode, it means you have a code, and your TCU is functioning properly. What you need to do is jump the service connector in the passenger side kick panel, count the flashes, reference the meaning of the counted flashes, and go from there. For information on how to jump the service connector, please read the sticky at the top of this section that says 'READ HERE FIRST'.

I've jumped the connector and I don't get any codes.

[accordztech]

open the tcu and look for anything burnt. Or acid leaking from the capacitors (cylinder looking things)

[cloudasc]

I've jumped the connector and I don't get any codes.

No codes means a bad TCU, time to open up your current TCU, and maybe try to re-solder your capacitors and resistors. If it is still acting up, your best bet is to acquire another from a junkyard / elsewhere, doing the required maintenance to it (so it doesn't burn out from a leaking/shorting cap), or look at getting a refurbished unit.

The DIY doesn't fix all cases of bad tcu's, but it has fixed over 95% of cases so far. $5 and 30 minutes of your time is all it takes.

Also for anyone unaware, the link to the DIY: 90-93 TCU Fix is in my signature.

[Truballer328]

No codes means a bad ecu, time to open up your current TCU, and maybe try to re-solder your capacitors and resistors. If it is still acting up, your best bet is to acquire another from a junkyard / elsewhere, doing the required maintenance to it (so it doesn't burn out from a leaking/shorting cap), or look at getting a refurbished unit.

The DIY doesn't fix all cases of bad tcu's, but it has fixed over 95% of cases so far. $5 and 30 minutes of your time is all it takes.

Also for anyone unaware, the link to the DIY: 90-93 TCU Fix is in my signature.

Means bad ecu or tcu? And yeah I have replaced all capacitors and resistors that were burnt... So probably need to replace complete tcu... Thanks guy

[accordztech]

look again, might of missed one.

[Truballer328]

Anybody know of a good place to order a tcu, some where trustworthy for good parts?

[cloudasc]

Means bad ecu or tcu? And yeah I have replaced all capacitors and resistors that were burnt... So probably need to replace complete tcu... Thanks guy

TCU*, previous quote corrected.