A/T - Harsh/Delayed Upshift
GROUPAUTOMATIC TRANSMISSION
DATE
MARCH 2013
NUMBER
13-AT-005-1
MODEL
Elantra Sedan (HD)
Elantra Touring (FD)
SUBJECT:
AUTOMATIC TRANSAXLE HARSH AND/OR DELAYED UPSHIFT - GDS ANALYSIS
This TSB supersedes TSB 13-AT-005 to revise the Op Code
Description:
This procedure uses the GDS to analyze shift performance for the 2007~10 Elantra Sedan and 2009~12 Elantra Touring.
Applicable Vehicles:
WARRANTY INFORMATION - No Trouble Found (NTF):
WARRANTY INFORMATION - Automatic Transaxle replacement
SERVICE PROCEDURE:
1. Check the A/F level when the engine is idling in "N" according to TSB 06-40-016. Adjust the ATF level as needed.
2. Reset and relearn the adaptive values according to TSB 12-AT-017.
3. Compare to a similar model and year vehicle. If the shift delay is:
^ Same as comparison vehicle: Return the vehicle to the customer.
^ Longer than the comparison vehicle, continue with the diagnosis.
4. Attach the GDS and check for Diagnostic Trouble Codes in both the "Engine and "Automatic Transaxle menu. If DTC are found, repair according to the appropriate TSB or shop manual.
5. Attach the GDS and select the following:
^ VIN and "A/T"
^ "Current Data
> Shift position
> Pressure Control Solenoid A duty
> Pressure Control Solenoid B duty
> Pressure Control Solenoid C duty
> On/off solenoid duty
CAUTION
Ask an assistant to drive the vehicle as you monitor the GDS.
6. Drive the vehicle and verify the condition:
^ Accelerate the vehicle and shift from 1-2-3-4 at 25~50% throttle (TPS).
^ Select "Record" (on top right of screen)
Select "PC Record" (on left of screen) and save the file.
REVIEW THE GDS DATA:
1-2 UPSHIFT:
^ Open the GDS program and select:
^ VIN and "A/T"
^ "Flight Record" and "Data Review"
^ Select "Items List" (top right of screen) and select: "Shift Position", "Pressure control solenoids A, B & C" and "On/off solenoid".
^ Click the "+" or "-" buttons to choose 0.5 sec./Div. or less.
^ Move the cursor to the start of the shift and "Left click".
^ Move the cursor to the end of the shift and "Right click".
^ Read the Pressure Control Solenoid B elapsed time at the top right of the screen. If the 1-2 shift requires more than 2.0 seconds, replace the transaxle.
2-3 UPSHIFT:
Open the GDS program and select:
^ VIN and "A/T"
^ "Flight Record" and "Data Review"
^ Select "Items List" (top right of screen) and select: "Shift Position", "Pressure control solenoids A, B & C" and "On/off solenoid".
^ Click the "+" or "-" buttons to choose 0.5 sec./Div. or less.
^ Move the cursor to the start of the shift and "Left click".
^ Move the cursor to the end of the shift and "Right click".
^ Read the Pressure Control Solenoid A elapsed time at the top right of the screen. If the 2-3 shift requires more than 2.0 seconds, replace the transaxle.
3-4 UPSHIFT:
^ Open the GDS program and select:
^ VIN and "A/T"
^ "Flight Record" and "Data Review"
^ Select "Items List" (top right of screen) and select: "Shift Position", "Pressure control solenoids A, B & C" and On/off solenoid".
^ Click the "+" or "-" buttons to choose 0.5 sec./Div. or less.
^ Move the cursor to the start of the shift and "Left click".
^ Move the cursor to the end of the shift and "Right click".
^ Read the Pressure Control Solenoid B elapsed time at the top right of the screen. If the 3-4 shift requires more than 2.0 seconds, replace the transaxle.