Hyundai Tiburon 2003 Workshop Manual page 424

Some points (Displaced shifting points)
If some of the shift points are displaced while driving, the
cause may be a malfunction of the valve body, or it is
related to control and is not an abnormality.
INSPECTION PROCEDURE 13
No diagnostic trouble codes (Does not shift)
If shifting does not occur while driving and no diagnostic
trouble codes are given, the cause may be a malfunction of
the Park/Neutral position switch, or TCM.
INSPECTION PROCEDURE 14
Poor acceleration
If acceleration is poor even if downshifting occurs while
driving, the cause may be a malfunction of the engine
system or of a brake or clutch.
http://www.hmaservice.com/viewer/content.asp?IsPrint=true&imgnum=1&print_title...
Possible cause
• Malfunction of the valve body
Possible cause
• Malfunction of the Park/Neutral position switch
• Malfunction of the TCM
Possible cause
• Malfunction of the engine system
• Malfunction of the brake or clutch
Page 7 of 8
24.04.2008