Operation CHARM: Car repair manuals for everyone.
Home >> Hyundai >> 1989 >> Sonata L4-2.4L >> Repair and Diagnosis >> Cruise Control >> Cruise Control Servo Cable >> Technical Service Bulletins >> Cruise Control - Difficulty Shifting In/Out of Overdrive
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Cruise Control - Difficulty Shifting In/Out of Overdrive

89hyundai04

Subject: Cruise Control Shifts Transmission Out Of Overdrive
Group: ELECTRICAL


Number: 004


Date: MAY, 1989


Model: SONATA
Condition: When the cruise control is set in vehicles equipped with automatic transmissions, some vehicles may downshift out of overdrive and will not upshift back into overdrive unless the cruise control is cancelled. This condition may also occur after climbing slight grades.

Cause: Accelerator/Cruise Control cables are not properly adjusted.

Correction: Adjust throttle control cables per Sonata Shop Manual, pages 27-71 through 27-73.

Note: Misadjusted accelerator/cruise control cables will only cause downshifting when the vehicle is being operated in overdrive. The downshift only occurs between overdrive and third gear.
pro multis · About Operation CHARM