Kia Niro: High Voltage Battery Control System / Pre-Charge Resistor Description and operation

Description

Built into the Power Relay Assembly (PRA), the Pre-Charge Resistor protects the high voltage circuit by limiting the current while the inverter capacitor is being charged.

1. High Voltage Power Terminal (-)
2. High Voltage Power Terminal (+)
3. Battery Current Sensor
4. Inverter Power Terminal (-)
5. Inverter Power Terminal (+)
6. Pre-Charge Resistor
7. Main Relay (+)
8. Pre-Charge Relay
9. Main Relay (-)
10. Power Relay Assembly Connector (Battery current sensor signal input)
11. Power Relay Assembly Connector (Main relay control)

Pre-Charge Resistor Specifications
Specification Item Specification Resistance (Ω) 40 [20°C (68°F)] Rated power (W) 40 ...

Pre-Charge Resistor Schematic diagrams
Circuit Diagram [B03-C] (Relay Control) [B03-S] (Relay Control) ...

Other information:

Kia Niro 2017 (DE HEV) Service Manual: Hybrid Power Control Unit (HPCU) 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 instr ...

Kia Niro 2017 (DE HEV) Service Manual: ETC (Electronic Throttle Control) System Specifications
Specification [Throttle Position Sensor (TPS)] Throttle angle(°) Output Voltage (V) [Vref=5V] TPS1 TPS2 0 0.5 4.5 10 0.96 4.05 ...

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