A/T - Third Gear Fail-Safe
SOURCE: Hyundai Tech Net Times Volume 13 Issue 3 2003TITLE: Third Gear Fail-Safe
APPLIES TO: The following models are equipped with a new generation transaxle (oil pan on side): 1999-2003 Sonata, 2001-03 Elantra, Santa Fe, XG, 2003 Tiburon.
SERVICE TIP:
The following models are equipped with a new generation transaxle (oil pan on side): 1999-2003 Sonata, 2001-03 Elantra, Santa Fe, XG, 2003 Tiburon. With this transaxle, the TCM continuously monitors all the sensors and solenoids on the transaxle when the vehicle is in operation. If the TCM detects a sensor or solenoid related condition, the TCM sets the transaxle in 3rd gear fail-safe to protect the transaxle and to provide a "limp-home" mode for the customer.
The TCM normally supplies 12 volts to the A/T control relay, which energizes the solenoids. If the TCM detects a condition that may prevent the correct operation of the transaxle, it turns off the current to the A/T relay, which cuts power to the solenoids. This causes the underdrive and overdrive clutches to be applied, providing 3rd gear fail-safe. The TCM then sets a DTC.
If you are servicing a vehicle with a customer comment of "stuck in gear" or "won't shift", check for DTC in both the "Engine" and "Automatic transaxle" menus. Refer to TSB 02-40-011 or 02-40-012 to find the applicable TSB.