Hyundai Ioniq: High Voltage Battery System / Battery Fuse Box

Power Relay Assembly (PRA). 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...

Description and operation

DescriptionBattery fuse box is located on the side of the high voltage battery pack. It prevents cells from being damaged by external factors, such as short or overcurrent...

Other information:

Hyundai Ioniq (AE) 2017-2025 Service Manual: General safety information and caution

Safety PrecautionPrecautions To Take Before Servicing High Voltage System    • Since hybrid vehicles contain a high voltage battery, if the high voltage system or vehicles are handled incorrectly, this might lead to a serious accidents like electric shock and electric leakage...

Hyundai Ioniq (AE) 2017-2025 Service Manual: Heated Oxygen Sensor (HO2S). Description and operation

DescriptionHeated Oxygen Sensor (HO2S) consists of zirconium and alumina and is installed both upstream and downstream of the Manifold Catalytic Converter. The sensor output voltage varies in accordance with the air/fuel ratio.The sensor must be hot in order to operate normally...