KIA Niro: Pre-Charge Resistor

Specification

Description

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

PRA Operation Sequence

Circuit Diagram

Harness Connector and Terminal Function

Pre-Charge Resistor Repair procedures

Warning

• 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.
• Be sure to read and follow the "High Voltage Shut-off Procedures" before doing any work related with the high voltage system. Failure to follow the safety instructions may result in serious electrical injuries.

1. Switch "OFF" the ignition and disconnect the negative (-) terminal of the auxiliary 12V battery.
2. Shut off the high voltage circuit.

   (Refer to Hybrid Control System - "High Voltage Shut-off Procedures")

3. Remove the power relay assembly.

   (Refer to High Voltage Battery System - "Power Relay Assembly")

4. Insert a screwdriver or an awl (B) into the hole (A).
5. Lift the pre-charge resistor (D) in the direction of arrow (C).

6. Remove the pre-charge resistor (A).

Installation

Warning

• 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.

  - Be sure to read and follow the "High Voltage Shut-off Procedures" before doing any work related with the high voltage system. Failure to follow the safety instructions may result in serious electrical injuries.

1. Install in the reverse order of removal.

Inspection

Warning

• 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.
• Be sure to read and follow the "High Voltage Shut-off Procedures" before doing any work related with the high voltage system. Failure to follow the safety instructions may result in serious electrical injuries.

1. Remove the pre-charge resistor.

   (Refer to High Voltage Battery Control System - "Pre-Charge Resistor")

2. Check for continuity between the terminals using an ohmmeter.

Specification : 40Ω (20ºC (68ºF))

READ NEXT: