90 gts cruise control

[PingPong21]

I had reset the ecu by taking out the ecu fuse horn and efi fuses for a minute and then put them back and it reset the ecu. after that the cruise control on the celica worked in amazement but only for 10 min. do you think it would just be a electronic problem or a mechanical issue?

[ctgriffi]

Originally Posted by PingPong21

I had reset the ecu by taking out the ecu fuse horn and efi fuses for a minute and then put them back and it reset the ecu. after that the cruise control on the celica worked in amazement but only for 10 min. do you think it would just be a electronic problem or a mechanical issue?

I know this thread is like two years old, but did you ever solve the cruise control problem? My GTS has the motor-driven actuator, but I've got the same issue—everything looks fine, "cruise" light shows on dash, but it never will "grab" the throttle.

I've thoroughly tested the actuator and the wheel-mounted cruise switch, and everything checks out there. Brake and clutch pedal switches are good, too.

I'd love to hear an update on this thread, if any solution was found!

[garrisonboobs]

he sold his gt-s for an all trac and i don't think he ever fixed it. no one ever seems too lol. i'll ask him if you don't ever figure it out.
seems like you checked everything already. so i don't know what to recommend any more lol. i looked around on other forums and it seems like the brakes and actuator are most common but no one seems to fix it haha. good luck and hope you fix it!

[subspec]

well there was two units. depending on what one you have. one was vac controlled. the other was electronic. if you can take a look at what unit you have.

[ctgriffi]

Haven't given up...I got this tip from a Toyota mechanic recently: It's pretty common on these older cars for a wire from the cc switch to get pinched or cut somewhere down in the steering column—especially if you've got the tilt-wheel (I do).

So, that's my next course of action, pulling the wheel, digging into the steering column.

Subspec: I've got the electric-motor driven actuator. I've already had that thing out a few times, disassembled, reassembled, and tested according to the specs in Chilton's. It moves back and forth as designed when voltage is applied, and I see the correct resistance readings according to the actuator arm position.

Thanks!

[ctgriffi]

In case anybody still cares about this issue...I finally got my cruise working again. For those of you that are trying to troubleshoot the system in your own cars, here are the usual suspects:

-Bad or misadjusted switches on the brake or clutch pedals, as well as the parking brake.
-Pinched wires in the steering column, especially if you've got the tilt wheel.
-Bad actuator (electric or vacuum-driven)
-Bad CC computer

I went down through this list over the course of the last few months. (There is a 22 page technical document that covers how to troubleshoot the 93 Toyota Celica cruise system. You can find it over on Celicatech.com.) After checking and double-checking all the typical issues mentioned above, I pretty much ruled them all out and landed on this: bad vehicle speed sensor. The technical doc I mentioned, as well as the standard Chilton's repair manual, both have detailed instructions for testing the VSS, once you've got it removed. Mine failed the test repeatedly, which confirmed my suspicions...

The VSS has a 3-wire plug and mounts on top of the tranny (speedo cable connects to the top of it). It's a big PITA to remove and not a cheap part, but, after replacing it, my cruise instantly worked again—just like new. Best price I found on the part was at Midway Auto Supply, Dallas TX; total was $157 w/shipping, and it was here within 3 business days. Part number at Midway is: SC393.

Note: I had to remove the intake, air box, charcoal canister, etc. to do the sensor replacement. I decided to swap out the original, Toyota fuel filter at the same time, since I had good access to it...turns out, that job was an even bigger PITA! Beware! Just make sure you have a good 14mm flare nut wrench and a big can of PB-Blaster, if you attempt the fuel filter replacement.

[ctgriffi]

In case anybody still cares about this issue...I finally got my cruise working again. For those of you that are trying to troubleshoot the system in your own cars, here are the usual suspects:

-Bad or misadjusted switches on the brake or clutch pedals, as well as the parking brake.
-Pinched wires in the steering column, especially if you've got the tilt wheel.
-Bad actuator (electric or vacuum-driven)
-Bad CC computer

I went down through this list over the course of the last few months. (There is a 22 page technical document that covers how to troubleshoot the 93 Toyota Celica cruise system. You can find it over on Celicatech.com.) After checking and double-checking all the typical issues mentioned above, I pretty much ruled them all out and landed on this: bad vehicle speed sensor. The technical doc I mentioned, as well as the standard Chilton's repair manual, both have detailed instructions for testing the VSS, once you've got it removed. Mine failed the test repeatedly, which confirmed my suspicions...

The VSS has a 3-wire plug and mounts on top of the tranny (speedo cable connects to the top of it). It's a big PITA to remove and not a cheap part, but, after replacing it, my cruise instantly worked again—just like new. Best price I found on the part was at Midway Auto Supply, Dallas TX; total was $157 w/shipping, and it was here within 3 business days. Part number at Midway is: SC393.

Note: I had to remove the intake, air box, charcoal canister, etc. to do the sensor replacement. I decided to swap out the original, Toyota fuel filter at the same time, since I had good access to it...turns out, that job was an even bigger PITA! Beware! Just make sure you have a good 14mm flare nut wrench and a big can of PB-Blaster, if you attempt the fuel filter replacement.

[Huaraches]

i just gave up trying to fix that cruise control lol

[123crazy]

Yea i thibk everyone just gives uo eventually.

[ctgriffi]

Not everyone...