Cruise Control - Engine Idle Fluctuation.

Group
36 - ENGINE
ELECTRICAL

Number
02-36-022-1

Date
12-2002

Model
Elantra 2001 - 2002,
Santa Fe 2001 - 2002,
Sonata 1999 - 2002 and
Tiburon 2003

Subject:

ENGINE RPM FLUCTUATION - CRUISE CONTROL CABLE ADJUSTMENT PROCEDURE

This TSB has been revised to include additional diagnostic trouble codes and adaptation clearing instructions.

DESCRIPTION:

This bulletin provides diagnostic and service procedures for a vehicle that may experience engine RPM fluctuation and also exhibits some or all of the following:

^ The vehicle has less than approximately 2,000 miles on the odometer or the vehicle has had the cruise control cable removed recently.

^ The TPS Adaptation Value (as displayed by the Hi-Scan Pro in the "Current Data" Menu) has reached its maximum value of 29.9%. A common value is typically less than 10%.

^ The TPS Value (as displayed by the Hi-Scan Pro in the Current Data Menu) does not increase until the throttle pedal has been depressed about 25% of its normal travel.

^ The vehicle may also have a higher than specified idle and DTC P0507 (Idle Speed Higher Than Expected) may also be found stored in the ECM.

^ The vehicle may also have less throttle response than expected.

^ The ECM may have diagnostic trouble codes P0121 (TPS Plausibility) and/or P0123 (TPS High Input) stored.

This TSB applies to the following models:

^ 1999-2002 Sonata V6
^ 2001-2002 Santa Fe V6
^ 2001-2002 Elantra
^ 2003 Tiburon (both 14 and V6)

POSSIBLE CAUSE:

The cause of the condition may be a cruise control cable that needs adjustment. A cruise control cable that needs adjustment may be positioning the throttle plate slightly open, causing all or some of the symptoms mentioned above.

REPAIR PROCEDURE:

Correct the condition by creating a slight slack in the cruise control cable. Adjust the cable at either the throttle body end or the cruise control module end (depending on the model).











There should be approximately 1 to 3 mm (1/32" to 1/8") of slack when the cable is pushed sideways lightly (see the picture shown). RESET THE TPS ADAPTATION VALUE by using the Hi-Scan Pro. In the Hyundai Diagnostic Engine Menu, there is an option (typically # 10) for "RESETTING ADAPTIVE VALUES" . Do NOT disconnect the battery power. This will cause the Readiness Monitors to be reset as-well-as any TCM adaptation values.