23-HC-001H-1
Service Bulletin Details
Public Details for: 23-HC-001H-1
On certain sonata hybrid (yf hev) vehicles, the hev safety plug or power relay assembly (pra) may cause the following symptoms and one or more current related dtcs. Follow the service procedure before diagnosing the hybrid battery. Please r
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GROUP NUMBER HYBRID CONTROL DATE Technical Service Bulletin 23-HC-001H-1 MODEL(S) AUGUST 2023 SONATA HYBRID (YF HEV) DTC P1B25, P1B76, P1B77, P0A0D SUBJECT: This TSB supersedes TSB# 23-HC-001H to simplify the subject header, better define inspection path in DTC List and add clarification in Step 6 for identifying non-genuine fuses. IMPORTANT If the affected part is beyond factory warranty, submit a Prior Approval request for goodwill consideration prior to performing the work. Description: On certain Sonata hybrid (YF HEV) vehicles, the HEV safety plug or power relay assembly (PRA) may cause the following symptoms and one or more current related DTCs. Follow the Service Procedure before diagnosing the hybrid battery. Please review the following instructions carefully to determine applicability depending on the model year of your vehicle. Warning light: • No “EV Ready” mode, or “Ready” light blinks on and off • “Check Engine” warning light on • Charging system warning light on • “Wrench” symbol (service indicator) blinks on and off Drivability symptoms: • Vehicle will not move from a stop or gasoline engine will not turn on. • Warning in the instrument cluster display: “Hybrid System Warning! Safely stop and Do Not Drive” and/or alarm sound. DTC List: DTC Description Inspect P0A0D High Voltage System Interlock Circuit High HEV safety plug P1B25 High Voltage Path Fault HEV safety plug → PRA P1B76 High Voltage Relay Fault HEV safety plug → PRA P1B77 High Voltage Precharging Fault HEV safety plug → PRA For 2013-2015MY Sonata Hybrid (YF HEV): Please refer to “TSB 23-01-054H Safety Plug and Fuse Inspection/Replacement (Service Campaign 994)” first if open on the vehicle before troubleshooting Power Relay Assembly (PRA). If no open campaigns are found, proceed with this TSB. Applicable Vehicles: 2011-15MY Sonata Hybrid (YF HEV) Circulate To: General Manager, Service Manager, Parts Manager, Warranty Manager, Service Advisors, Technicians, Body Shop Manager, Fleet Repair DTC P1B25, P1B76, P1B77, P0A0D SUBJECT: Parts Information: Model Part Name Section 2011-15MY Sonata Hybrid (YF HEV) Power Relay Assembly (PRA) PNC Part Number 37514 37514-4R000 37586 37586-4R000AS 37586-4R002 *Refer to parts catalog for the applicable safety plug P/N 37-371 2011-15MY Sonata Hybrid (YF HEV) SST Information: Tool Name EV Safety Plug Figure Electrical Insulating Safety Glove/Protector Set* Tool # Remarks J-48755-10H (small) J-48755-11H (medium) J-48755-12H (large) Order from Hyundai.servicesolutions.com, “EV Tools” *Use only rubber insulating gloves that meet or exceed ASTM D120 standards (1000 volts AC/1500 volts DC). Warranty Information: Model Op. Code Operation Op. Time Causal Part All Sonata Hybrid (YF HEV) 37514R1H Power Relay Assembly Replacement 1.0 M/H 37514-4R000 37586R1H Safety Plug Inspection & Replacement 0.2 M/H 37586-4R001 37514RQ0 GDS operation 0.3 M/H N/A 2011-2012 Sonata Hybrid (YF HEV) Nature Code Cause Code E23 ZZ6 NOTE 1: Normal warranty applies. NOTE 2: Submit claim on Claim Entry Screen as “Warranty” type. NOTE 3: Refer to the latest Digital Documentation Policy for repair validation requirements. 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. NOTE 5: If a part is found in need of replacement while performing this TSB 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. TSB #: 23-HC-001H-1 Page 2 of 8 SUBJECT: DTC P1B25, P1B76, P1B77, P0A0D SUBJECT: Service Procedure: STUI Refer to the latest Digital Documentation Policy for requirements. 1. If vehicle is 13-15MY, go directly to step 7 for Power Relay Assembly Replacement. 2. Depress the brake pedal and press the Start/Stop button once to activate “EV Ready” mode. Attach a GDS, and select VIN, BMS menu and DTC. Check for DTC in the BMS menu. Record the DTC and description. Delete the DTC. Select Current Data and the following parameters. If the results are not as shown, the power relay assembly (PRA) may not be functioning correctly. Go to step 3. 3. Parameter BMS Main Relay ON Status Result YES Inverter Capacitor Voltage 200v~310v Turn off the ignition, open the rear trunk and open the cover to the safety plug. ! WARNING Failure to wear protective gear and perform this procedure may result in accidental injury or death. Follow all safety precautions in the shop manual: • Hybrid Motor System > General Safety Information and Caution Put on insulating gloves and pull up on the black tab and pull out the safety plug. 4. Without depressing the brake pedal, push the Engine Start-Stop button 2 times to power the cluster. Attach a GDS and select BMS menu, Current Data and Inverter Capacitor Voltage. Confirm the Inverter Capacitor Voltage is less than 30V. • If less than 30V, the system voltage is safe for the technician. Turn OFF the ignition and disconnect the 12V negative (–) battery cable. Go to step 5. • If more than 30V, wait until the voltage is less than 30V before performing any repairs. Turn OFF the ignition and disconnect the 12V negative (–) battery cable. Go to step 5. TSB #: 23-HC-001H-1 Page 3 of 8 SUBJECT: DTC P1B25, P1B76, P1B77, P0A0D SUBJECT: 5. Use a DVOM to measure the resistance of the BUS fuse inside the safety switch. Measure the resistance between the BMS pins. Specification: 1Ω or less BUS Fuse If the resistance is: • • Not within specification: Replace the safety plug and proceed to step 7. BMS Pins Within specification: Go to step 6. TSB #: 23-HC-001H-1 Page 4 of 8 SUBJECT: DTC P1B25, P1B76, P1B77, P0A0D SUBJECT: 6. Visually inspect the lower part (A) of the safety plug to see if the fuse is genuine or nongenuine as shown at right. • Genuine part (“PEC” Branded): No need to replace. Reinstall all parts in reverse order of removal and proceed to step 7. • Non-genuine part: Replace the safety plug, reinstall all parts in reverse order of removal. Genuine part A Example of a Non-genuine part A 7. i Information B The following steps (7 – 13) only apply for PRA-related DTCs P1B76/P1B77. B B Remove the rear seat. Refer to the shop manual: • Body (Interior and Exterior) > Seat & Power Seat > Rear Seat > Repair procedures Remove the 7 screws (B) securing the rear seat access cover. B B B B TSB #: 23-HC-001H-1 Page 5 of 8 SUBJECT: SUBJECT: 8. DTC P1B25, P1B76, P1B77, P0A0D Remove the 5 fasteners (C) and remove the carpet trim. D Refer to the shop manual: • Body (Interior and Exterior) > Interior > Trunk Trim > Repair procedures D C C D Remove the 4 nuts (D) securing the air duct and remove the air duct. C D C C 9. Remove the nuts and bolts (E) securing the steel cover and remove the cover for the power relay assembly (PRA). E E E TSB #: 23-HC-001H-1 Page 6 of 8 SUBJECT: DTC P1B25, P1B76, P1B77, P0A0D SUBJECT: 10. ! WARNING The HEV battery may have a charge of 120~150v. Failure to wear insulating gloves may result in accidental injury or death. H Put on leather gloves on top of the insulating gloves. Wear safety glasses. G Remove the negative (–) cable (F) first and wrap the cable end with insulating tape. F Next remove the positive (+) cable (G) and wrap the end with insulating tape (H). Tightening Torque: 11. lb-ft 7.3 lb-in 87 N.m 9.4 i Information With the high voltage cables insulated, you may perform the steps below without PPE. Remove the 10mm nut securing the inverter cables to the power relay assembly (PRA) (I). Remove the negative (–) inverter cable (J) first, then the positive (+) cable (K). K J Tightening Torque: lb-ft 7.3 lb-in 87 N.m 9.4 I TSB #: 23-HC-001H-1 Page 7 of 8 SUBJECT: DTC P1B25, P1B76, P1B77, P0A0D SUBJECT: 12. Remove the black connector here as well as the mating connector anchored to the steel tab to gain access to the nut securing the BMS ECU. 13. Loosen the four nuts (L) and tilt the BMS ECU to the left to provide clearance between it and the power relay assembly (PRA). BMS ECU L M Remove the three mounting nuts (M) and remove the power relay assembly (PRA). Install a new PRA following the reverse order of removal. Tightening Torque: lb-ft 7.3 lb-in 87 N.m 9.4 L 14. Reassemble all parts in the reverse order of disassembly. 15. Attach a GDS and delete any DTC. 16. Clear the DTC in the BlueLink system according to instructions in TSB 19-BE-010 (or latest version). 17. Drive the vehicle for two key-on/key-off drive cycles. 18. End of service procedure. TSB #: 23-HC-001H-1 Page 8 of 8 SUBJECT: