21-EM-007H
Service Bulletin Details
Public Details for: 21-EM-007H
This bulletin describes the procedure to diagnose and repair the engine electric water pump (eewp) on certain sonata hybrid (lf hev) and sonata plug-in hybrid (lf phev) vehicles with dtc P2600, causing an hev and/or mil warning lamp illum
GROUP NUMBER Engine Mechanical DATE Technical Service Bulletin 21-EM-007H MODEL(S) Sonata Hybrid (LF HEV), Sonata Plug-In Hybrid (LF PHEV) June, 2021 DTC P2600 ENGINE ELECTRIC WATER PUMP DIAGNOSIS AND REPAIR GUIDELINE SUBJECT: Description: This bulletin describes the procedure to diagnose and repair the Engine Electric Water Pump (EEWP) on certain Sonata Hybrid (LF HEV) and Sonata Plug-In Hybrid (LF PHEV) vehicles with DTC P2600, causing an HEV and/or MIL warning lamp illumination. Diagnostic Trouble Code Information: P2600 - COOLANT PUMP “A” CONTROL CIRCUIT / OPEN o Internal circuit of EEWP (opened/ shorted) or Engine coolant level may be too low. Applicable Vehicles: Certain 2016-2019MY Sonata Hybrid (LF HEV) and Sonata Plug-in Hybrid (LF PHEV) Vehicles Parts Information: PART NAME Figure PUMP ASSY-COOLANT (Engine Electric Water Pump) Part Number QTY 25100-2E272 1 Warranty Information: MODEL Sonata Hybrid (LF HEV), Sonata Plug-In Hybrid (LF PHEV) OP CODE OPERATION PUMP ASSY25100R00 WATER AND/OR GASKET OP TIME CAUSAL PART Refer to WEBLTS for current LTS time 25100-2E272 NATURE CAUSE CODE CODE D32 ZZ3 Note: Normal Warranty Applies. Circulate To: General Manager, Service Manager, Parts Manager, Warranty Manager, Service Advisors, Technicians, Body Shop Manager, Fleet Repair SUBJECT: DTC P2600 ENGINE ELECTRIC WATER PUMP DIAGNOSIS AND REPAIR GUIDELINE Service Procedure: 1. Confirm that there are sufficient coolant levels in the Engine Coolant Reservoir. If coolant levels are low, check for leaks and repair as needed. 2. Turn on the engine. 3. Connect GDS and clear all related DTC’s. 4. Use GDS and force activate the EEWP with an actuation test. NOTICE GDS-M will display “Operation Command Sent” if the ECU accepted the request to operate the component. 5. If EEWP fails to operate when commanded ON with the GDS Actuation Test, check connectors for loose connections. o While EEWP is commanded ON, apply a wiggling motion on the connections to confirm wiring connections and pins are not damaged. Repair as needed. Make note of any DTCs that set or failed operation and listen for the EEWP making noise. If EEWP State displays a Fault Code, then replace the EEWP. If EEWP State displays a Protection Code, check voltage on auxiliary battery. o An EEWP static pressure related DTC may be generated in case of abnormal auxiliary battery voltage. TSB #: 21-EM-007H Page 2 of 5 SUBJECT: SUBJECT: DTC P2600 ENGINE ELECTRIC WATER PUMP DIAGNOSIS AND REPAIR GUIDELINE 6. Check EEWP S/W version if auxiliary battery voltage is normal. Perform S/W reprogramming through GDS in case of version error. NOTICE 16MY Only: Refer to TSB 16-01-020-1 and verify no circuit pin 3 on C132 (EEWP). 7. If EEWP fails inspection portion of the service procedure or if P2600 resets, then the EEWP must be replaced following the steps below. 8. Shut off the High Voltage circuit. Refer to the shop manual section for complete service procedure: Engine Mechanical System > High Voltage Shut-off Procedures ! WARNING The hybrid system uses 270V DC high voltage. Be sure to follow safety instructions. Otherwise, serious injury or death from electrocution may occur. 9. Remove the engine undercover. Refer to the shop manual section for complete service procedure: Engine Mechanical System > Engine and Transmission Assembly > Engine Room Under Cover 10. Turn off the ignition switch and disconnect the battery (-) terminal (B). NOTE: Tightening torque: 8.8 Nm (78 lb-in) NOTICE 11. Be sure to record the radio presets prior to battery disconnection. Loosen the drain plug and drain the engine coolant. Remove the radiator cap to help drain the coolant faster. Refer to the shop manual section for complete service procedure: Engine Mechanical System > Cooling System > Coolant 12. Remove the EEWP connector. TSB #: 21-EM-007H Page 3 of 5 SUBJECT: SUBJECT: DTC P2600 ENGINE ELECTRIC WATER PUMP DIAGNOSIS AND REPAIR GUIDELINE 13. Disconnect the radiator lower hose (A). A 14. Remove the intake manifold. Refer to the shop manual section for complete service procedure: Engine Mechanical System > Intake and Exhaust System > Intake Manifold 15. Remove the drive belt. Refer to the shop manual section for complete service procedure: Engine Mechanical System > Timing System > Drive Belt 16. Remove the Hybrid Starter Generator. Refer to the shop manual section for complete service procedure: Hybrid Motor System > Hybrid Motor Assembly > Hybrid Starter Generator (HSG) 17. Remove the Thermostat housing. Refer to the shop manual section for complete service procedure: Engine Mechanical System > Cooling System > Thermostat 18. Disconnect the oil cooler hose and heater pipe hose. Refer to the shop manual section for complete service procedure: Engine Mechanical System > Lubrication System > Oil Cooler TSB #: 21-EM-007H Page 4 of 5 SUBJECT: SUBJECT: DTC P2600 ENGINE ELECTRIC WATER PUMP DIAGNOSIS AND REPAIR GUIDELINE 19. Remove the EEWP (B). NOTICE Tightening Torque: 15.95 lb-ft (21.55 Nm) B NOTICE 20. Clean the EEWP mounting bolt hole with an air gun as the tab may be damaged by the sealant residue from the seal bolt. Remove and clean the vibration insulation plate before EEWP reinstallation. Reinstall parts in reverse order of removal. NOTICE Reprogram the radio presets recorded from Service Procedure Step 10. 21. Fill the Radiator with coolant and check for leaks. 22. Run the engine for at least 15 minutes after refilling the coolant to allow all the trapped air to escape, and check EEWP. NOTICE ! Bleed air from the hybrid motor cooling system prior to the engine cooling system. Bleed air from the engine cooling system. o Start engine and allow it to warm up until radiator engages 3-4 times o Turn off engine. Check coolant level and add if needed. o Put radiator cap on tight, then run engine again and check for leaks. o Always use new coolant. CAUTION Rev-up the engine 2 to 3 times to let out air in the coolant. Note that revving the engine to high RPMs may activate the “HEV Warning Lamp”, so do NOT apply excessive pressure when engaging the accelerator pedal. If “HEV” Warning Lamp” turns ON, turn OFF the engine and start it back up for normal operation. 23. The service procedure is now complete. TSB #: 21-EM-007H Page 5 of 5 SUBJECT: