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1991 Toyota Corolla Cruise Won't Hold

1991 TOYOTA COROLLA
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WTDASH
  • MEMBER
  • 3 POSTS
Hello,
Cruise light on dash comes on when pushed, but when using SET on the stalk it doesn't hold speed.

There is no fuse listed in the manual or the fuse lid for the cruise control.

Which part commonly fails on these?

Thanks in advance,
Todd
Dec 17, 2006 at 3:24 PM
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2CARPRO JACK
  • ✓Experienced Mechanic
  • 11,533 POSTS
Check the ECU fuse and Ign fuse.Other than that the vehicle can be scanned through on-board diagnostics to see if the computer has an issue with something in the system
Dec 18, 2006 at 3:34 AM
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LOSONE
  • ✓Experienced Mechanic
  • 1,616 POSTS
Jack, if the light comes on the fuse is good. In 91 it was fused through the accessory circuit.

One question that hasn't been asked is if it is after market. Most Corollas of that vintage didn't have cruise. With no fuse listed it has to be an after market.

The most common cause is a vacuum line leak to the cruise servo, the vacuum servo or a bad switch in the stalk. There is also a beaded chain that accuates the throttle. If there is too much slack, it will cause the problem.

The processor doesn't enter into the circuit.

Remember, basics before computers.

Let me know

losone
Dec 18, 2006 at 5:44 AM
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WTDASH
  • MEMBER
  • 3 POSTS
It's a factory/OEM cruise..only option on the car!...The stalk also does the intermittent wipers (option #2?), which work fine.

I'll replace the servo(s) and maybe tackle the stalk - that requires a bunch of work to replace, it appears.

Thanks,
Todd
Dec 20, 2006 at 5:29 AM
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Suggested Repair

Check the vacuum lines to the cruise servo, the vacuum servo itself, the cruise switch in the stalk, and slack in the beaded chain that actuates the throttle. A fuse is less likely if the dash light comes on, and the processor is not typically part of this circuit.

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Conversation Summary

The owner of a 1991 Toyota Corolla with factory cruise control said the dash light comes on when cruise is pressed, but SET does not hold speed. One reply suggested checking the ECU and ignition fuses and scanning the system. Another said the light indicates the fuse is good and identified a vacuum leak, bad servo, faulty stalk switch, or excessive throttle-chain slack as common causes. The owner planned to replace the servo and possibly the stalk.

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