Hi,
What you described can be the result of a few different things. Things such as low transmission fluid, a bad transmission control module, or a faulty transmission range sensor can do this.
The first this I need to share is this. When the PCM is replaced, the TCM (transmission control module) needs to be reset as well. Here are the directions for doing that:
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2002 Hyundai Accent L L4-1495cc 1.5L SOHC MFI
A/T Controls - ECM/TCM Reset and Relearn Adaptive Values
Vehicle A/T Controls - ECM/TCM Reset and Relearn Adaptive Values
A/T CONTROLS - ECM/TCM RESET AND RELEARN ADAPTIVE VALUES
GROUP
AUTOMATIC TRANSMISSION
DATE
SEPTEMBER 2013
NUMBER
13-AT-016
MODEL
ALL
SUBJECT
AUTOMATIC TRANSAXLE CONTROL MODULE - RESET AND RELEARN ADAPTIVE VALUES
This TSB supersedes TSB 12-AT-017 to add 2013 and 2014 vehicles.
NOTE
After replacing a transaxle or PCM/TCM or reprogramming the PCM/TCM, follow this procedure to reset and relearn the adaptive learning to improve shift quality.
Description: The PCM or TCM contains logic to adjust solenoid duty and line pressure as needed to compensate for normal clutch wear over the life of the transaxle. This bulletin provides the procedures necessary to reset (erase) and "relearn" the PCM/TCM adaptive values.
After the following repairs have been completed, the PCM/TCM adaptive values must be reset in order to provide optimum shift quality:
Replace automatic transaxle or PCM/TCM
Reprogram or exchange a PCM/TCM from another vehicle
Applicable Vehicles: ALL
Normal Warranty applies
I. RESET PCM/TCM ADAPTIVE VALUES WITH GDS :
SERVICE PROCEDURE
1. Attach a GDS and select VIN and A/T menu.
2. From the main screen, select "Option Treatment"
3. Select "Resetting Auto T/A values" and follow the screen prompts.
Pic 8
GDS must be used to reset (erase) the adaptive learning for the following vehicles.
II. RELEARN ADAPTIVE VALUES:
pic 9
1. Attach a GDS and select VIN and A/T menu, Current Data and Throttle Position Sensor.
Pic 10
2. Drive the vehicle until the ATF temperature is within the range shown.
3. Request an assistant to monitor the GDS:
Accelerate from a stop at the TPS specification while the transmission shifts through gears 1-2-3-4-5-6-7-8 (if equipped) and decelerate slowly to a stop. Repeat 5 times.
NOTE
Hold the accelerator pedal steady during the upshifts.
Do not exceed local speed limits.
4. Stop the vehicle and move the shift lever from N to D and N to R, stopping 3 5 seconds in each gear. Repeat 5 times.
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If that doesn't help, I've done a little research on this and did find a technical service bulleting (TSB) related to this exact problem. This is what I would recommend doing if a reset/ relearn has already been performed with no effect. It appears that there is a known problem. Here are the TSB and directions for diagnosing the issue. The attached pics will correlate with the directions.
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2002 Hyundai Accent L L4-1495cc 1.5L SOHC MFI
A/T - No Movement In Drive/Reverse
Vehicle Transmission and Drivetrain Technical Service Bulletins A/T - No Movement In Drive/Reverse
A/T - NO MOVEMENT IN DRIVE/REVERSE
AUTOMATIC TRANSAXLE - NO MOVEMENT IN DRIVE OR REVERSE GEAR
MODEL: ALL
DESCRIPTION:
If you are servicing a vehicle with no movement in drive or reverse gear follow the procedure shown below:
REPAIR PROCEDURE:
1. Check for DTC in both the "Engine" and "Automatic Transaxle" menus:
If DTC are found, refer to TSB 05-40-008 or 04-40-020 for repair guidance.
If no DTC are found, go to Step 2.
2. Remove the dipstick and check the ATF for a strong burnt smell. If the smell does not provide conclusive results, remove the oil pan and check for metal particles in the pan:
If a strong burnt smell or metal particles are found, replace the transaxle
If not, go to Step 3
NOTE:
ATF that is a dark brown or black color does not indicate an internal transaxle concern; do not replace the transaxle. SPIII may change color to a dark brown after 10,000 to 25,000 miles in service. This change is normal for this type of ATF.
VERIFY THE RANGE SWITCH ADJUSTMENT:
3. Move the shift lever to "N".
Pic 1
4. Insert a 5 mm drill or MS (5 mm) bolt in the adjustment hole of the range switch. Check that the drill or bolt fits into the adjustment holes.
If not, go to Step 5
If so, go to Step 9
pic 2
5. Loosen the two 10 mm mounting bolts.
Pic 3
6. Disconnect the shift cable at the lever.
7. Insert a 5 mm drill or M5 (5 mm) bolt in the adjustment hole of the range switch. Tighten the two 10 mm mounting bolts to specification.
Specification: 7-8 ft. Lb
(10-12 Nm, 100-120 kg. Cm)
8. Move the shift lever to the "N" position. Attach the
shift cable to the lever and install the nut. Tighten the nut to specification.
Specification: 9-10 ft. Lb
(12-13 Nm, 120-130 kg. Cm)
Remove the 5 mm drill or M5 bolt
pic 4
VERIFY THE SIGNAL FROM THE RANGE SWITCH:
9. Attach a Hi-Scan Pro and select:
"Hyundai Vehicle Diagnosis"
Vehicle
Automatic Transaxle" menu
"Current Data" menu
"Select Lever Switch" and "Shift Position:
10. Move the shift lever to Reverse.
Monitor "Select Lever Switch".
If "R" is displayed, the TCM is receiving the correct signal from the range switch. Go to Step 11.
If not, check the connector at the TCM and the range switch for a bent pin or pin not fully inserted.
Check the wiring harness for an open or short circuit. If ok, replace the range switch.
Pic 5
11. Move the shift lever to Drive.
Monitor "Shift Position" and "Select Lever Switch".
If "D" and "GEAR 1" are displayed, the TCM is receiving the correct signal from the range switch. Go to Step 12.
If not, check the connector at the TCM and the range switch for a bent pin or pin not fully inserted.
Check the wiring harness for an open or short circuit. If ok, replace the range switch.
Pic 6
12. Install the A/T Tester, P/N 09450-AT000, to the vehicle:
Shift the transaxle to "D". Move the gear selector switch of the A/T Tester and shift manually in 1, 2, 3, 4, and 5 gears (if equipped).
Pic 7
NOTE:
Use the "EF, XG" switch for side-pan transaxles and the "LC" switch for bottom pan transaxles.
Disconnect the A/T Tester from the solenoid. Do not reconnect the harness connector to the solenoid. Shift the transaxle to "R".
If no movement replace the transaxle.
If the vehicle moves check the harness connector at the TCM and the solenoid for a bent pin or pin not fully inserted. Check the wiring harness for an open or short circuit.
If no problem is found swap a TCM from a similar vehicle and test for movement in Drive and Reverse. If the vehicle moves in Drive and Reverse replace the TCM.
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Let me know what you find or if you have other questions.
Take care,
Joe
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Friday, December 4th, 2020 AT 7:22 PM