Accent L4-1.6L (2003)
Control Module: All Technical Service Bulletins
A/T - TCM Adaptive Learning Procedure
Group: TRANSAXLE
Number: 03-40-003
Date: FEBRUARY, 2003
Model: ALL
Subject
AUTOMATIC TRANSAXLE CONTROL MODULE
ADAPTIVE LEARNING
This TSB supersedes TSB # 01-40-002 to include additional information.
DESCRIPTION:
The transaxle control module (TCM) internal logic allows the TCM to compensate for mechanical tolerance changes which may occur during the life of
the transaxle due to normal wear. If battery power is disconnected from the TCM, adaptive learning is cancelled.
Whenever battery power is disconnected from the TCM or a new transaxle is installed, follow the procedure in this bulletin to restore adaptive learning.
NOTE:
Transaxle shift quality should not be evaluated until adaptive learning has been completed.
TCM logic was revised to allow adaptive learning to occur at a lower temperature on the dates shown below.
NOTE:
Adaptive learning does not begin until the ATF is above the temperature shown.
ADAPTIVE LEARNING PROCEDURE:
1.
Attach a Hi-Scan Pro and select "Automatic Transaxle" menu, "Current Data" menu and "Trans Temp. Sensor".
2.
Drive the vehicle until the ATF temperature is above the temperature shown.
3.
Accelerate the vehicle through several 1-2-3-4 upshifts at small throttle openings (approximately 25-30% TPS) until shift flare and shift shock no
longer occur.
NOTE:
Adaptive learning for the 2-3 shift takes longer than for the 1-2, or 3-4 shifts.
