23-01-036H-1
Service Bulletin Details
Public Details for: 23-01-036H-1
Some elantra (cn7a), sonata (dn8a) and santa fe (tma) vehicles may exhibit the electronic parking brake (epb) warning light on due to brake fluid entering the hecu electrical connector. Dtc C1501 (epb switch failure) may be present, but epb
- 2022 -
GROUP NUMBER CAMPAIGN DATE Technical Service Bulletin SUBJECT: JUNE 2023 23-01-036H-1 MODEL(S) ELANTRA (CN7A) SONATA (DN8A) SANTA FE (TMA) HECU MODULE DARK CURRENT MEASUREMENT AND REPLACEMENT (SERVICE CAMPAIGN 990) This TSB supersedes 23-01-036H to include a step to reconnect the negative battery terminal on page 8, clarify multi-fuse removal and reinstallation for Sonata and Santa Fe vehicles, and to add a note to check the multimeter fuse before measuring dark current. IMPORTANT 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. Access the “Vehicle Information” screen via WEBDCS to identify open campaigns. Description: Some Elantra (CN7A), Sonata (DN8A) and Santa Fe (TMA) vehicles may exhibit the Electronic Parking Brake (EPB) warning light on due to brake fluid entering the HECU electrical connector. DTC C1501 (EPB Switch Failure) may be present, but EPB performance remains unaffected. This bulletin describes the procedure to inspect, and if necessary, replace the Hydraulic Electronic Control Unit (HECU). STUI As outlined in the Digital Documentation Policy, all claims require VIN and Mileage validation through VCI connection or photo capture. Additionally, please ensure the repair Part photo requirement is completed according to the steps in the TSB. All claims submitted that have incomplete, illegible, or missing documentation are subject to debit. Applicable Vehicles (Certain): • 2022MY Elantra (CN7A) equipped with 2.0L engines produced 12/09/2021 - 02/14/2022 (VINs beginning with “5NP”). • 2022MY Sonata (DN8A) equipped with 1.6T and 2.5L engines produced 12/01/2021 04/12/2022 (VINs beginning with “5NP”). • 2022MY Santa Fe (TMA) equipped with 2.5L and 2.5T engines produced 11/30/2021 03/21/2022(VINs beginning with “5NM”). Circulate To: General Manager, Service Manager, Parts Manager, Warranty Manager, Service Advisors, Technicians, Body Shop Manager, Fleet Repair SUBJECT: HECU MODULE DARK CURRENT MEASUREMENT AND REPLACEMENT (SERVICE CAMPAIGN 990) Parts Information: Model Part Name Original P/N New P/N QTY. Elantra (CN7A) Hydraulic Unit Assy ESCI+ 58910-AB800 58910-AB800QQH 1 Sonata (DN8A) Hydraulic Unit Assy ESCI+ 58910-L0100 58910-L0100QQH 1 Santa Fe 2.5L (TMA) Hydraulic Unit Assy ESCI+ 58910-S2DA0 58910-S2DA0QQH 1 Santa Fe 2.5T (TMA) Hydraulic Unit Assy ESCI+ 58910-S2GA0 58910-S2GA0QQH 1 SST Information: Tool Name Part Number Figure Multimeter DT-830D+ HK589-DT830QQH NOTE 1: Each dealer has been provided 1 multimeter for the start of the campaign. NOTE 2: Before taking the dark current measurement, check the multimeter internal fuse. If the fuse is not intact, replace it before use. TSB #: 23-01-036H-1 Page 2 of 10 SUBJECT: SUBJECT: HECU MODULE DARK CURRENT MEASUREMENT AND REPLACEMENT (SERVICE CAMPAIGN 990) Warranty Information: Model Elantra (CN7A) Sonata (DN8A) Santa Fe (TMA) Op. Code Operation Op. Time 20DA25R0 HECU Dark Current Inspection ONLY (below max value) 0.3 M/H 20DA25R1 HECU Dark Current Inspection (equal to or above max value) and HECU Replacement 1.5 M/H 20DA25R3 HECU Dark Current Inspection ONLY (below max value) 0.3 M/H 20DA25R4 HECU Dark Current Inspection (equal to or above max value) and HECU Replacement 1.5 M/H 20DA25R6 HECU Dark Current Inspection ONLY (below max value) 0.3 M/H 20DA25R7 HECU Dark Current Inspection (equal to or above max value) and HECU Replacement 1.5 M/H Causal Part Nature Code Cause Code I3B ZZ3 58910AB800QQH 58910L0100QQH 58910S2DA0QQH NOTE 1: Submit claim on Claim Entry Screen as “Campaign” type. NOTE 2: If a part that is not covered by this recall is found in need of replacement while performing Service Campaign 990 and the affected part is still under warranty, submit a separate 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. NOTE 3: Op times include VIN, Mileage and Part (if applicable) validation. All claims submitted that have incomplete, illegible, or missing documentation are subject to debit. NOTE 4: The incident parts are subject to callback through the normal Warranty Technical Center (WTC) parts return process. Claim is subject to debit if the part is not returned. Information i • If the “ABS”, “ESC” or “Brake” indicator lamps are illuminated, refer to the appropriate section of the repair manual prior to performing this TSB inspection. TSB #: 23-01-036H-1 Page 3 of 10 SUBJECT: SUBJECT: HECU MODULE DARK CURRENT MEASUREMENT AND REPLACEMENT (SERVICE CAMPAIGN 990) Service Flowchart: Service Inspection Guidance: Model Elantra (CN7A) Sonata (DN8A) Santa Fe 2.5L (TMA) Santa Fe 2.5T (TMA) Part Number Part Name Fuse Measurement Point Maximum Dark Current Value 58910-AB800 Hydraulic Unit Assy 40A (ABS) 95 µA 58910-L0100 Hydraulic Unit Assy 40A (ABS) 95 µA 58910-S2DA0 Hydraulic Unit Assy 30A (ABS) 95 µA 58910-S2GA0 Hydraulic Unit Assy 30A (ABS) 105 µA TSB #: 23-01-036H-1 Page 4 of 10 SUBJECT: SUBJECT: HECU MODULE DARK CURRENT MEASUREMENT AND REPLACEMENT (SERVICE CAMPAIGN 990) Fuse Box Cover Measurement Point Guide: Elantra (CN7A): 58910-AB800 Sonata (DN8A): 58910-L0100 Santa Fe (TMA): 58910-S2DA0 / 58910-S2GA0 Service Procedure: 1. Record customer’s radio presets. NOTICE Turn off the vehicle, close all doors, and wait at least 3 minutes after IGN OFF (to enter ESC Sleep mode). *If the door is open while in standby, sleep mode will not activate. TSB #: 23-01-036H-1 Do not “Start” the engine at any time during the test procedure. Doing so will yield inaccurate dark current measurement results. Page 5 of 10 SUBJECT: SUBJECT: 2. HECU MODULE DARK CURRENT MEASUREMENT AND REPLACEMENT (SERVICE CAMPAIGN 990) Disconnect the battery negative (-) terminal and remove the junction box fuse cover. Negative (-) Battery Terminal Nut Tightening Torque: lb-ft • 3.0-4.4 kgf.m • 0.4-0.6 N.m • 4.0-6.0 i Information DN8A vehicles: The ABS fuse measurement location is under the right multi-fuse bar. TMA vehicles: The ABS fuse measurement location is under the left multi-fuse bar. 3. Sonata (DN8A) vehicles: Remove the 10 mm multi-fuse mounting nut. Remove both multi-fuses. Re-install the multifuse on the left, leaving the right multi-fuse space open for dark current measurement. Remove both multi-fuses. Locate the ABS fuse location in the junction box (see the Fuse Box Measurement Point Guide). Re-install the multi-fuse on the left, as shown in the image. Re-install the multi-fuse mounting nut. TSB #: 23-01-036H-1 Page 6 of 10 SUBJECT: SUBJECT: HECU MODULE DARK CURRENT MEASUREMENT AND REPLACEMENT (SERVICE CAMPAIGN 990) Santa Fe (TMA) vehicles: Remove the 10 mm nut and lift the junction cable over the stud. Remove both multi-fuses. Re-install the multifuse on the right, leaving the left multi-fuse space open for dark current measurement. Remove both multi-fuses. Locate the ABS fuse location in the junction box (see the Fuse Box Measurement Point Guide). Re-install the multi-fuse on the right, as shown in the image. Reconnect the junction cable using the 10mm nut. Elantra (CN7A) vehicles: Locate the ABS fuse location in the junction box (see the Fuse Box Measurement Point Guide). Use the fuse puller to remove the 40A ABS fuse. TSB #: 23-01-036H-1 Page 7 of 10 SUBJECT: SUBJECT: 4. HECU MODULE DARK CURRENT MEASUREMENT AND REPLACEMENT (SERVICE CAMPAIGN 990) Reconnect the negative (-) battery terminal. Negative (-) Battery Terminal Nut Tightening Torque: lb-ft • 3.0-4.4 kgf.m • 0.4-0.6 N.m • 4.0-6.0 5. Set the multimeter to the 200 µA setting. Connect the probe leads as shown – black in the center COM terminal, red on the right side VΩmA terminal. TSB #: 23-01-036H-1 Page 8 of 10 SUBJECT: SUBJECT: HECU MODULE DARK CURRENT MEASUREMENT AND REPLACEMENT (SERVICE CAMPAIGN 990) 6. Contact the red lead to the positive (+) battery terminal. Contact the black lead to the appropriate ABS fuse location (see the Fuse Box Measurement Point Guide). Positive Terminal “+” 7. ABS Measure the multimeter value/reading for at least 30 seconds. The current draw value must stay consistent for a proper measurement. NOTICE Take care to not damage the terminals. 8. STUI Using STUI, take a photo showing the multimeter dark current reading, and the open junction box. Include the last 6 digits of the VIN and the date of repair on a piece of paper. Upload the photo to STUI. Example of STUI Photo TSB #: 23-01-036H-1 Page 9 of 10 SUBJECT: SUBJECT: 9. HECU MODULE DARK CURRENT MEASUREMENT AND REPLACEMENT (SERVICE CAMPAIGN 990) • If current draw value is below the maximum dark current value as listed above in the Service Inspection Guidance on page 4: o Reinstall the removed parts in the reverse order. No further action is required. • If current draw value is equal to OR over the maximum dark current value as listed above in the Service Inspection Guidance on page 4: o Replace the Hydraulic Electronic Control Unit Assy (HECU) by referring to the shop manual. i Information All part orders are on manual allocation. STUI If HECU is replaced: Using STUI, take a photo showing the newly installed HECU, along with the removed original HECU. Include the last 6 digits of the VIN and the date of repair on a piece of paper. Upload the photo to STUI. Example of STUI Photo 10. Reassemble vehicle in the reverse order of removal. 11. Start the engine. Confirm the “ABS”, “ESC” and “Brake” indicator lamps are not illuminated, clear any incidental DTCs and reprogram the customer’s radio preset stations. 12. The service procedure is now complete. TSB #: 23-01-036H-1 Page 10 of 10 SUBJECT: