Hyundai Tiburon (2003 year). Manual — part 106

INSPECTION PROCEDURE 8

the engine is idling, the cause may be abnormal underdrive
clutch pressure or a malfunction of the underdrive clutch,
valve body or closed throttle position switch.

• Malfunction of the underdrive clutch

• Malfunction of the valve body

• Malfunction of the closed throttle position switch

Shock when changing from N to R and large time lag

Possible cause

If abnormal shocks or a time lag of 2 seconds or more
occurs when the selector lever is shifted from N to R range
while the engine is idling, the cause may be abnormal
reverse clutch pressure or low and reverse brake pressure,
or a malfunction or the reverse clutch, low and reverse
brake, valve body.

• Abnormal reverse clutch pressure

• Abnormal low and reverse brake pressure

• Malfunction of the low and reverse solenoid valve

• Malfunction of the reverse clutch

• Malfunction of the low and reverse brake

• Malfunction of the valve body

INSPECTION PROCEDURE 9

INSPECTION PROCEDURE 10

Shocks when changine from N to D, N to R and large

time lag

Possible cause

If abnormal shocks or a time lag of 2 seconds or more
occurs when the selector lever is shifted from N to D, N to R
range while the engine is idling, the cause may be abnormal
line pressure or a malfunction of the oil pump or valve body.

• Abnormal line pressure

• Malfunction of the oil pump

• Malfunction of the valve body

Shocks and running up

Possible cause

If shocks occur when driving due to upshifting or
downshifting and the transaxle speed becomes higher than
the engine speed, the cause may be abnormal line pressure
or a malfunction of a solenoid valve, oil pump, valve body or
of a brake or clutch.

• Abnormal line pressure

• Malfunction of each solenoid valve

• Malfunction of the oil pump

• Malfunction of the valve body

• Malfunction of each brake or each clutch

INSPECTION PROCEDURE 11

INSPECTION PROCEDURE 12

All points (Displaced shifting points)

Possible cause

If all shift points are displaced while driving, the cause may
be a malfunction of the output shaft speed sensor, TPS or a
solenoid valve.

• Malfunction of the output shaft speed sensor

• Malfunction of the throttle position sensor

• Malfunction of each solenoid valve

• Abnormal line pressure

• Malfunction of the valve body

• Malfunction of the TCM

INSPECTION PROCEDURE 13

INSPECTION PROCEDURE 14

Some points (Displaced shifting points)

Possible cause

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.

• Malfunction of the valve body

No diagnostic trouble codes (Does not shift)

Possible cause

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.

• Malfunction of the Park/Neutral position switch

• Malfunction of the TCM

Poor acceleration

Possible cause

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.

• Malfunction of the engine system

• Malfunction of the brake or clutch