21-01-017H
Service Bulletin Details
Public Details for: 21-01-017H
This bulletin provides the service procedure to update the transmission control unit (tcu) software for certain elantra (cn7/cn7a) vehicles equipped with the 2.0l mpi and intelligent variable transmission (ivt). This update to the damper cl
- 2021 -
Models from 2021
2021 HYUNDAI ELANTRA |
GROUP NUMBER CAMPAIGN Technical Service Bulletin DATE March, 2021 21-01-017H MODEL(S) Elantra (CN7/CN7a) IVT DAMPER CLUTCH LOGIC UPDATE (SERVICE CAMPAIGN T6B) SUBJECT: IMPORTANT *** Dealer Stock and Retail Vehicles *** Dealers must perform this Service Campaign on all affected vehicles prior to customer retail delivery and whenever an affected vehicle is in the shop for any maintenance or repair. When a vehicle arrives at the Service Department, access Hyundai Motor America's “Vehicle Information Screen (VIS)" via WEBDCS to identify open Campaigns. Description: This bulletin provides the service procedure to update the Transmission Control Unit (TCU) software for certain Elantra (CN7/CN7a) vehicles equipped with the 2.0L MPI and Intelligent Variable Transmission (IVT). This update to the damper clutch logic is to address a potential engine stall condition immediately following Forward Collision Avoidance (FCA) activation under specific operating conditions at low engine RPM and low vehicle speeds. In the event a low-speed stall does occur, the engine can immediately be restarted. Applicable Vehicles: Certain 21MY Elantra (CN7/CN7A) vehicles equipped with 2.0L MPI IVT ROM ID: Vehicle ROM ID Engine TM PCU P/No. OLD NEW 39171-2JCB5 39173-2JCB0 Elantra (CN7) 39171-2JCC0 39171-2JCC5 2.0L MPI IVT 39173-2JCC0 39171-2JBD5 Elantra (CN7a) CCN0N20NS0 CCN0N20NS1 CCN0N20NS5 CCN0N20NS2 39171-2JBE0 39171-2JBB5 39171-2JBC0 Circulate To: General Manager, Service Manager, Parts Manager, Warranty Manager, Service Advisors, Technicians, Body Shop Manager, Fleet Repair SUBJECT: IVT DAMPER CLUTCH LOGIC UPDATE (SERVICE CAMPAIGN T6B) GDS Information: System Selection: TRANSMISSION CONTROL UNIT (TCU) Event # Description 677 677.CN7/CN7a -TCU LOGIC IMPROVEMENT FOR IVT OPERATION (*or use a later available event as listed in the GDS TCU Update screen if one is available.) Warranty Information: Model Op. Code Operation Op. Time Causal Part Causal Code Nature Code Elantra (CN7) 10D035R0 TCU UPGRADE 0.3 M/H 39171-2JCB5 T72 ZZ3 Elantra (CN7a) 10D035R1 TCU UPGRADE 0.3 M/H 39171-2JBD5 T72 ZZ3 Note 1: Submit Claim on Campaign Claim Entry Screen Note 2: If a part is found in need of replacement while performing this campaign and the affected part is still under warranty, submit a separate warranty claim using the same Repair Order. If the affected part is out of warranty, submit a Prior Approval Request for goodwill consideration prior to performing the work. CAUTION ! 1. 2. 3. 4. 5. 6. Verify the vehicle battery has reasonable charge. Turn off all lamps (Do not leave head lamp switch in auto mode.), and all accessories. Perform update with the ignition switch in the ON position. Do not disconnect any cables connected to the vehicle or scan tool during update. Do not start the engine during update. Do not turn off the ignition switch during update. ! WARNING GDS-M Vehicle Battery Low Voltage Warning: When the vehicle battery is lower than 12 volts, the GDS-M will trigger a Low Battery Voltage Warning. If this Warning occurs, A. Connect the battery to a fully charged battery jump pack or GR8 charger using “Power Supply Mode” to continue the software update. OR B. Select “BACK” to exit the SW update. Then, start the engine and idle with the headlights on for 20 minutes. Return to the SW update after charging the battery. NOTICE Perform the update in Auto Mode. If the automatic update is unsuccessful, perform the Manual Update Procedure. TSB #: 21-01-017H Page 2 of 3 SUBJECT: SUBJECT: IVT DAMPER CLUTCH LOGIC UPDATE (SERVICE CAMPAIGN T6B) Service Procedure A. Automatic Update Procedure 1. Perform the GDS-M software update per TSB 15-GI-001. 2. Reset the TCU adaptive learning values. 3. Start the engine to confirm the proper operation of the vehicle. B. Manual Update Procedure NOTICE Only perform the manual update procedure if the automatic update procedure is unsuccessful. If the automatic upgrade is unsuccessful, turn the ignition off for about 10 seconds. Turn the ignition back on and reset the control unit before performing the manual update. 1. From the GDS-M home screen, select ECU Upgrade. 2. From the ECU Upgrade screen, select Manual Mode, then select the Update Event 677. Update Event 677.CN7/CN7a-TCU LOGIC IMPROVEMENT FOR IVT OPERATION 3. A password prompt will appear. Enter the password and select Upgrade. MENU PASSWORD CN7/CN7a 2.0MPI TCU 39171/3-2JCB0/CB5/CC0/CC5/BD0/BD5/BE0/BE5/BB0/BB5/BC0/BC5 3917 4. The update will occur. 5. Once the update finishes, turn the ignition off for 10 seconds, then turn the ignition back on. Check if any Diagnostic Trouble Codes (DTCs) were created by the update, and clear all related DTCs. 6. Reset the TCU adaptive learning values. 7. Start the engine to confirm the proper operation of the vehicle. 8. The service procedure is now complete. TSB #: 21-01-017H Page 3 of 3 SUBJECT: