Accent GT Coupe L4-1495cc 1.5L DOHC MFI (1997)
PARTS INFORMATION
WARRANTY INFORMATION:
Normal warranty operation codes and times apply.
Technical Service Bulletin # 98-40-001
Date: 980101
A/T - Harsh 4-3 Downshift When Decelerating
Group: TRANSAXLE
Number: 98-40-001
Date: JANUARY, 1998
Model: ALL
Subject
HARSH 4-3 DOWNSHIFT WHEN DECELERATING TO A STOP
DESCRIPTION:
Some vehicles may have a harsh 4-3 downshift when decelerating to a stop. The condition occurs when decelerating at speeds below 5-10 mph and is
likely to be more pronounced when the automatic transaxle fluid (ATF) temperature is cold. If a vehicle experiences this condition, please follow the
diagnostic procedures shown.
DIAGNOSTIC PROCEDURE:
1.
Inspect the ATF level in "NEUTRAL" with the ATF at normal operating temperature (70-90°C, 158-194°F).
A.
If the fluid level is low, add ATF to bring the level to the top of the "Full" mark.
B.
Inspect the ATF color and smell. If the ATF is black and smells burned, remove the transaxle oil pan. If metal particles and clutch material
are found in the oil pan, replace the transaxle.
2.
Check that the idle speed is within specification. Adjust, if necessary. (Refer to appropriate Shop Manual, under "Fuel System Section", "Service
Adjustment Procedures".)
3.
Attach the scan tool to the data link connector (DLC) and select the "Transaxle" menu.
A.
Select "Codes" and check for diagnostic codes (DTC). If DTCs are present, repair the condition.
B.
Select "Data" and "Idle Switch". Check that the idle switch reads as shown. If not, adjust or replace the idle switch. (For adjustment
procedures, see TSB # 97-40-029 for 1995-97 Sonata or TSB # 97-40-031 for all other vehicles)
-
Engine idling-Idle switch reads "On" or "Closed"
-
Engine rpm increased 100-200 rpm above idle-Idle switch reads "Off" or "Open"
C.
Select Accelerator Switch" (refer to TSB # 97-40-031 for applicable vehicles). Check that the accelerator switch reads as shown. If not,
adjust or replace the accelerator switch according to TSB # 97-40-031.
-
Engine idling Accelerator switch reads "Off" or "Open"
-
Engine rpm increased 100-200 rpm above idle-Accelerator switch reads "On" or "Closed"
4.
Adjust the kickdown servo to the specification shown in the appropriate Shop Manual, under "Automatic Transaxle" section. Refer to TSB #