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

Description

Built into the Power Relay Assembly (PRA), the Pre-Charge Relay starts to charge the capacitor of the inverter soon after ignition "ON", then it goes out when the capacitor has been fully 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)

[PRA Operation Sequence]

Pre-Charge Relay Specifications
Specification Item Specification Contact Rated Voltage (V) 450 Rated Current (A) 10 ...

Pre-Charge Relay Schematic diagrams
Circuit Diagram ...

Other information:

Kia Niro 2017 (DE HEV) Service Manual: Repair procedures
Service Point Target Auto Calibration (SPTAC) This procedure provides a way to calibrate the camera by having the service technician align the car to a well lit simulated straight road target; preferably wall mounted. The LDWS camera will have a "System Out of Calibration& ...

Kia Niro 2017 (DE HEV) Service Manual: Fuel Filler Door Release Actuator Repair procedures
Removal 1. Disconnect the negative (-) battery terminal. 2. Remove the left luggage side trim. (Refer to Body - "Luggage Side Trim") 3. Disconnect the fuel filler door release actuator connector (A). ...

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