QuestionMr. Flowers,
I don't see cruise control in your list, but maybe its related and I saw your post on a similar topic (but the guy had so many problems, you couldn't diagnose over email) so maybe you can at least help me troubleshoot.
Bought a 2004 Tiburon 1.5 years ago and loving it. Only 24,200 miles on it. I noticed the cruise control no longer works. When I press the button to turn it on, the light on the display does come up like normal. I get to my speed, press down on the lever to set it like I have been doing and it no longer takes.
I have used it once a week (to my girlfriends house - must take interstate) for the last 1.5 years and never had a problem. Can you tell me how I may be able to troubleshoot this? I can't tell what's been changed - only maintenance I've done recently was air and oil / oil filter changed last month but I'm sure it worked after then. Any help would be great.
Answer hope this helps
SERVICE MANUAL
Applies to: Tiburon 2004
GROUP
Engine Electrical System Cruise Control System
TROUBLE SHOOTING
NOTE
Before troubleshooting :
Check the No.3(10A), No.13(15A) and No.17(10A) fuse in the under-hood fuse/relay box.
Check that the horn sounds.
Check the tachometer to see if it works properly.
Symptom
Suspect Area
Cruise control cannot be set
Main switch
SET/RESUME/CANCEL switch
Brake switch
A/T gear position switch
Cruise control nuit
Cruise control cannot be set but indicator light does not go on
Dimming circuit in gauge
Cruise control unit
Cruise speed is noticeably higher or lower than what was set
Vehicle speed sensor
Cruise control unit and actuator cable deflection
Cruise control nuit
Excessive overshooting or undershooting when trying to set speed
Cruise control unit and actuator cable deflection
Vehicle speed sensor
Cruise control unit
Speed fluctuation on a flat road with cruise control set
Vhicle speed sensor
Cruise control unit and actuator cable deflection
Cruise control nuit
Vehicle does not decelerate or accelerate accordingly when SET/RESUME/CANCEL button is pushed
Main switch
SET/RESUME/CANCEL switch
Cruise control unit
Cruise control does not cancel when shift lever is moved to N position (A/T)
A/T gear position switch
Cruise control unit
Set speed is not cancelled when brake pedal is pushed
Brake switch
Cruise control unit
Cruise control will not cancel when main switch is pushed OFF
Main switch
SET/RESUME/CANCEL switch
Cruise control unit
Cruise control will not cancel when CANCEL button is pushed
Main switch
SET/RESUME/CANCEL switch
Cruise control unit
Set speed will not resume when RESUME button (with main switch on, when set speed is temporarily cancelled)
Main switch
SET/RESUME/CANCEL switch
Cruise control unit
The transmission shifts down slower than normal when going up a hill with the cruise control on (A/T)
Troubleshooting the cruise control communication circuit
