# Service bulletin TSB\_ELE186\_R2

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10172126
- Published by NHTSA: 2020\-03\-05
- Manufacturer's number: TSB\_ELE186\_R2
- Manufacturer's date: 2020\-02\-19
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

TECHNICAL SERVICE BULLETIN: SERVICE ACTION: ELECTRIC WATER PUMP INSPECTION AND REPAIR \(SA394\) \- This bulletin has been revised to include additional information. This bulletin provides the procedure to inspect and repair the Electric Water Pump\(s\) \(EWP\) on some 2018\-2019MY Niro \(DE\) HEV, PHEV, and EV vehicles produced between November 24, 2018 through January 30, 2019, which may exhibit a MIL ON \(DTC U1116 and/or U1118\) due to a coolant leak from the EWP Can Case.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10172126-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10172126-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system

## Trouble codes named

U1116, U1118

## Vehicles listed

- 2018 to 2019 KIA NIRO
- 2018 KIA NIRO PHEV
- 2019 KIA NIRO PLUG\-IN HYBRID

## Recalls for the same vehicles and component

- [2018537](/recalls/tc/2018537.md), 2018-09-28: Electrical

## Other bulletins for the same vehicles and component

- [TSB\_CLI049\_R2](/bulletins/11036628.md), 2026-09-02, Service bulletin: ELECTRICAL SYSTEM; VISIBILITY/WIPER. TECHNICAL SERVICE BULLETIN: PARTIAL REPAIR – ELECTRICAL A/C COMPRESSOR \- This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information regarding the partial repair of the Air Conditioning \(A/C\) compressor assembly on some 2011MY\~ Optima Hybrid \(TF HEV, JF HEV/PHEV\), 2015MY\~ Soul EV \(PS EV\), 2017MY\~ Niro \(DE HEV/PHEV/EV\), 2022MY\~ EV6 \(CV\), 2021MY\~ Sorento \(MQ4 HEV/PHEV\), 2023MY\~ Sportage \(NQ5 HEV/PHEV\), and 2023MY\~ Niro \(SG2 EV/HEV/PHEV\) vehicles.
- [TSB\_ELE417](/bulletins/11031906.md), 2026-05-01, Service bulletin: ELECTRICAL SYSTEM. TECHNICAL SERVICE BULLETIN: INFOTAINMENT SOFTWARE UPDATE PROCEDURE \- This bulletin provides information on the process for downloading infotainment software updates and preparing USB for installation on applicable Kia vehicles. The software downloads and USB preparation process is similar across all supported platforms; however, in‑vehicle installation procedures vary by head unit type.
- [TSB\_ELE378](/bulletins/11015973.md), 2025-03-26, Service bulletin: ELECTRICAL SYSTEM. TECHNICAL SERVICE BULLETIN: SERVICE ACTION: KIA CONNECT MODEM RESET \(SA611\) \- This bulletin outlines the procedure for resetting the modem in certain 2016\-2025MY Kia vehicles listed on page 3 that are equipped with Kia Connect Services. The affected vehicles may encounter the following issues: remote Start/Climate Control function not working, vehicle Status on the Kia Access App not updating, connected routing not functioning properly.
- [TSB\_ELE270\_R3](/bulletins/11015367.md), 2025-03-08, Service bulletin: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. TECHNICAL SERVICE BULLETIN: SERVICE ACTION: INVERTER COOLANT/DEBRIS FLUSHING/REPLACEMENT FOR CLUSTER MESSAGE “REFILL INVERTER COOLANT” \(SA512\) \- This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information to flush out the inverter low\-conductivity coolant \(BSC\-1\) on certain 2019\-2022MY Niro EV \(DE EV\) vehicles produced from May 10, 2019 through October 4, 2021, which may exhibit a “Refill inverter coolant” message displayed on the instrument cluster due to poor flow of coolant/antifreeze inside the coolant pipes. In most cases, the inverter reservoir tank coolant may be filled to normal level and no DTC’s are stored due to an increase operation of the electric water pump \(EWP\) that is 2,450 RPMs or more when checked.
- [TSB\_ELE270\_R2](/bulletins/10244290.md), 2023-11-03, Service bulletin: ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. TECHNICAL SERVICE BULLETIN: SERVICE ACTION: INVERTER COOLANT/DEBRIS FLUSHING/REPLACEMENT FOR CLUSTER MESSAGE "REFILL INVERTER COOLANT" \(SA512\) \- This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information to flush out the inverter low\-conductivity coolant \(BSC\-1\) on certain 2019\-2022MY Niro EV \(DE EV\) vehicles produced from May 10, 2019 through October 4, 2021, which may exhibit a "Refill inverter coolant" message displayed on the instrument cluster due to poor flow of coolant/antifreeze inside the coolant pipes. In most cases, the inverter reservoir tank coolant may be filled to normal level and no DTC's are stored due to an increase operation of the electric water pump \(EWP\) that is 2,450 RPMs or more when checked.
- [TSB\_CLI049\_R1](/bulletins/10238225.md), 2023-07-05, Service bulletin: ELECTRICAL SYSTEM; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:COMPRESSOR; VISIBILITY. TECHNICAL SERVICE BULLETIN: PARTIAL REPAIR \- ELECTRICAL A/C COMPRESSOR \- This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information regarding partial repair of the Air Conditioning \(A/C\) compressor assembly on some 2011MY\~ Optima Hybrid \(TF HEV, JF HEV/PHEV\), 2015MY\~ Soul EV \(PS EV\), 2017MY\~ Niro \(DE HEV/PHEV/EV\), 2022MY\~ EV6 \(CV\), 2021MY\~ Sorento \(MQ4 HEV/PHEV\), 2023MY\~ Sportage \(NQ5 HEV/PHEV\), and 2023MY\~ Niro \(SG2 EV/HEV/PHEV\) vehicles.
- [TSB\_ELE270\_R1](/bulletins/10238226.md), 2023-07-01, Service bulletin: ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. TECHNICAL SERVICE BULLETIN: SERVICE ACTION: INVERTER COOLANT/DEBRIS FLUSHING/REPLACEMENT FOR CLUSTER MESSAGE \&\#39;REFILL INVERTER COOLANT\&\#39; \(SA512\) \- This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information to flush out the inverter low\-conductivity coolant \(BSC\-1\) on certain 2019\-2022MY Niro EV \(DE EV\) vehicles produced from May 10, 2019 through October 4, 2021, which may exhibit a \&\#39;Refill inverter coolant\&\#39; message displayed on the instrument cluster due to poor flow of coolant/antifreeze inside the coolant pipes. In most cases, the inverter reservoir tank coolant may be filled to normal level and no DTC\&\#39;s are stored due to an increase operation of the electric water pump \(EWP\) that is 2,450 RPMs or more when checked.
- [PS748](/bulletins/10237607.md), 2023-07-01, Service bulletin: ELECTRICAL SYSTEM. PITSTOP: SHARING KIA CONNECT CREDENTIALS WITH THIRD\-PARTY APPS AND POTENTIAL IMPACT TO 12V BATTERY IN EVS \- Kia is aware of reports of unexpected drainage of the 12\-volt battery in some Kia electric vehicles \(EVs\). While Kia’s investigation is ongoing, a possible cause of the issue may be third\-party applications used by the customer that are causing excessive Kia Connect connections to the customer’s EV.
- [TSB\_ELE293\_R1](/bulletins/10236659.md), 2023-05-26, Service bulletin: ELECTRICAL SYSTEM. TECHNICAL SERVICE BULLETIN: BMS DTC JUDGEMENT LOGIC IMPROVEMENT \- This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area.This bulletin provides the procedure to update the software logic of the Battery Management System \(BMS\) on some 2019\-2022MY Niro EV \(DE EV\) vehicles produced from December 5, 2018 through April 12, 2022. The BMS ECU monitors voltage deviation between battery cells, poor insulation, abnormal cell voltage changes after charging, abnormal current change during charging, over\-voltage, temperature deviation or average cell deviation during driving is detected. These conditions can cause the BMU to set DTC P1AA600. The affected vehicles may exhibit a reduction in power and speed \(limp home mode\) and a MIL \&\#39;ON\&\#39; with DTC P1AA600 stored. This BMS DTC logic improvement will expand DTC P1AA600 into multiple DTCs to aid in proper diagnosis, which reduces the required time and steps outlined in the \&\#39;DTC Inspection\&\#39; on KGIS to determine the fault using \&\#39;freeze frame\&\#39; data.
- [TSB\_ELE293](/bulletins/10236658.md), 2023-05-26, Service bulletin: ELECTRICAL SYSTEM. TECHNICAL SERVICE BULLETIN: BMS DTC JUDGEMENT LOGIC IMPROVEMENT \- This bulletin provides the procedure to update the software logic of the Battery Management System \(BMS\) on some 2019\-2022MY Niro EV \(DE EV\) vehicles produced from December 5, 2018 through April 12, 2022. The BMS ECU monitors voltage deviation between battery cells, poor insulation, abnormal cell voltage changes after charging, abnormal current change during charging, over\-voltage, temperature deviation or average cell deviation during driving is detected. These conditions can cause the BMU to set DTC P1AA600. The affected vehicles may exhibit a reduction in power and speed \(limp home mode\) and a MIL \&\#39;ON\&\#39; with DTC P1AA600 stored. This BMS DTC logic improvement will expand DTC P1AA600 into multiple DTCs to aid in proper diagnosis, which reduces the required time and steps outlined in the \&\#39;DTC Inspection\&\#39; on KGIS to determine the fault using \&\#39;freeze frame\&\#39; data.

JSON: [/v1/bulletins/10172126](/v1/bulletins/10172126)

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