A printed copy is for reference only; publication information can be updated at any time.
Always refer to KGIS for the latest information. After logging in kdealer.com, the newest technical
publications are listed in ‘Service Releases’ and has the latest service information that has been released.
2020-2021MY
Niro HEV (DE HEV)
Niro PHEV (DE PHV)
TECHNICAL SERVICE BULLETIN
SERVICE ACTION: HCU/LDC LOGIC IMPROVEMENT
FOR P-DTC (SA484)
This bulletin provides the procedure to update the software logic of the Hybrid Control Unit/Low Voltage DC/DC
Converter (HCU/LDC) system on some 2020-2021MY Niro HEV (DE HEV) and Niro PHEV (DE PHEV) vehicles
produced in the date ranges shown below, which may incorrectly set a Power Train Diagnostic Trouble Code
(P-DTC). Follow the procedure outlined in this publication to apply the improved logic to the ‘HCULDC’ system
using the KDS ECU Upgrade function as described in this bulletin. For confirmation that the latest reflash has
been applied to a vehicle you are working on, verify the ROM ID using the table on page 2 of this bulletin.
October 20, 2020 to February 4, 2021
November 26, 2020 to January 22, 2021
A Service Action is a repair program without customer notification that is performed during the
warranty period. Any dealer requesting to perform this repair outside the warranty period will
Repair status for a VIN is provided on WebDCS (Service → Warranty Coverage → Warranty Coverage
Inquiry → Campaign Information). Not completed Recall / Service Action reports are available on
WebDCS (Consumer Affairs → Not Completed Recall → Recall VIN → Select Report), which includes
a list of affected vehicles.
This issue number is SA484.
Kia Diagnostic System (KDS)
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