Hyundai Ioniq: High Voltage Battery System / Power Relay Assembly (PRA). Description and operation
The Power Relay Assembly (PRA) consists of the positive and negative main relays, pre-charge relay, pre-charge resistor and battery current sensor. It is located inside the battery pack assembly and controls the high voltage power circuit between the high voltage battery and inverter by the control signal of BMS ECU.
![](images/power_relay_assembly_pra_description_and_operation-467/413/saehc6h011l.gif)
[PRA Operation Sequence]
![](images/power_relay_assembly_pra_description_and_operation-467/413/slhhc5018l.gif)
![](images/power_relay_assembly_pra_description_and_operation-467/413/saebc7e100n.gif)
Check the target charging voltage when replacing with a new module Fault Code1.Turn OFF the ignition switch.2.Connect the diagnostic tool device to the self-diagnosis connector (DLC)...
Removal
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Be sure to read and follow the "General Safety Information and Caution" before doing any work related with the high voltage system...
Other information:
DescriptionThe High Voltage Battery System provides the hybrid drive motor, HSG, and electric A/C compressor with electric energy and also reserves the electric energy generated during regeneration braking.It consists of the battery pack assembly, BMS ECU, power relay assembly, case, control wiring, cooling fan, and cooling ducts...
All Season Tires
HYUNDAI specifies all season tires on some models to provide good performance
for use all year round, including snowy and icy road conditions. All season tires
are identified by ALL SEASON and/or M+S (Mud and Snow) on the tire sidewall...
Categories
![Hyundai Ioniq. Hybrid Vehicle Interior Overview](images/books/1/hyundai_ioniq_hybrid_vehicle_interior_overview_3.png)
1. Door lock/unlock button
2. Driver position memory system
3. Side view mirror control switch
4. Central door lock switch
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