Hyundai Ioniq: High Voltage Battery Control System / Battery Temperature Sensor. Repair procedures

Hyundai Ioniq (AE) 2017-2025 Service Manual / Hybrid Control System / High Voltage Battery Control System / Battery Temperature Sensor. Repair procedures

Removal

•	Be sure to read and follow the "General Safety Information and Caution" before doing any work related with the high voltage system. Failure to follow the safety instructions may result in serious electrical injuries.

1.	Shut off the high voltage. (Refer to Hybrid Control System - "High Voltage Shut-off Procedures")

2.	Remove the high voltage battery pack assembly. (Refer to High Voltage Battery System - "Battery Pack Assembly")

3.	Remove the battery pack assembly rear cover (A) after loosening the mounting nuts.

4.	Remove the battery temperature sensor (A).

Installation

•	Be sure to read and follow the "General Safety Information and Caution" before doing any work related with the high voltage system. Failure to follow the safety instructions may result in serious electrical injuries.

1.	Install the battery temperature sensors in the reverse order of removal.

Inspection

•	Be sure to read and follow the "General Safety Information and Caution" before doing any work related with the high voltage system. Failure to follow the safety instructions may result in serious electrical injuries.

1.	Shut off the high voltage circuit. (Refer to Hybrid Control System - "High Voltage Shut-off Procedures")

2.	Connect the GDS to the Data Link Connector (DLC).

3.	Turn the ignition switch ON.

4.	Check the battery temperature in GDS service data.

5.	Disconnect the battery temperature signal connector (A).

Measure resistances of the temperature signal terminals (Refer to the table below), then compare the value with the GDS service data.

Item	Terminals
Module 1	BMS ECU B01-T (1), (7)
Module 4	BMS ECU B01-T (2), (8)
Air Inlet	BMS ECU B01-T (4), (10)

Specification : Refer to "Specification"

Battery Temperature Sensor. Schematic diagrams

C..

High Voltage Battery Cooling System

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