Elantra L4-1595cc 1.6L DOHC 16 Valve (1995)
Control Module: All Technical Service Bulletins
A/T - Cold Acceleration in 2ND Gear
Group: TRANSAXLE
Number: 97-40-021
Date: JULY, 1997
Model: ALL
Subject:
VEHICLE ACCELERATION WHEN COLD
(2ND GEAR AUTOMATIC SELECTION)
DESCRIPTION:
Following an initial "cold" start, when the transaxle is shifted from "Park" to "Drive", up to 1.5 seconds may pass before the transaxle shifts into gear.
The transaxle initially shifts into 2nd gear to reduce vehicle "creep" at idle when the transaxle is in "Drive". When the accelerator is pressed, the
transaxle will shift into 1st gear. If the accelerator is pressed before the initial shift into 2nd gear (creep) is completed, the driver may feel the transaxle
shift into 2nd gear and then into 1st gear.
This shift engagement into 2nd and then 1st feels more noticeable when the automatic transaxle fluid (ATF) is cold. For this reason, the logic of the
transaxle control module (TCM) is designed to improve the shift engagement feeling when the ATF is below the temperatures shown below. Below these
temperatures, the transaxle will accelerate from a stop in 2nd gear without downshifting into 1st gear. Originally, this temperature specification was 0°C
(32°F), but was changed to 11°C (52°F) (36°C (97°F) for the Sonata 3.0L) on the production dates shown below.
If a customer comments that the vehicle has poor acceleration or seems to accelerate in 2nd gear during the first acceleration in the morning, please
explain the above information to the customer.
(SEE TABLE BELOW FOR EFFECTIVE VEHICLE PRODUCTION DATE AND VIN)
EFFECTIVE PRODUCTION DATE AND VIN:
