Kia Niro: Engine Electrical System / High voltage shut-off procedures

Kia Niro 2017 (DE HEV) Service Manual / Engine Electrical System / High voltage shut-off procedures

High Voltage Shut-off Procedures

•	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.

High voltage components:

High Voltage Battery Pack Assembly, Power Relay Assembly (PRA), BMS ECU, Hybrid Power Control Unit (HPCU), Hybrid Drive Motor, HSG, Electric A/C Compressor, Low DC/DC Converter (LDC), Power Cable, Electric Compressor etc.

1.	Switch "OFF" the ignition and disconnect the negative (-) terminal of the auxiliary 12V battery.

2.	Remove the safety plug cover (A) under the rear seat..

3.	Unfasten the hook (A) in the direction of arrow.

4.	Unfasten the lever (A) in the direction of arrow.

5.	Remove the safety plug (A).

6.	Wait at least 5 minutes or until the capacitor in the high voltage system is fully discharged.

Measure the voltage between the inverter terminals to check that the capacitor in the inverter is discharged completely.

(1)	Remove air cleaner assembly and air duct. (Refer to Engine Mechanical System – “Air Cleaner”)

(2)

Disconnect the inverter power cable (A).

Disconnect the inverter power cable as shown below.

(3)

Measure the voltage between the inverter (+) terminal and the inverter (-) terminal.

Less than 30V : High voltage circuit properly shut

More than 30V : Fault on high voltage circuit

If measured more than 30V, check if the safety plug is removed completely. If measured more than 30V despite the safety plug is removed, there can be serious problem on the high voltage circuit. In this case, check DTC and do not touch the high voltage system circuits.

General safety information and caution

Safety Precaution Precautions to take before servicing high voltage system ...

Specifications

Specifications Ignition System Ignition Coil Item Specification Engine Time (RPM) 1000 2000 30 ...

Other information:

Kia Niro 2017 (DE HEV) Service Manual: Safety Plug Specifications
Specification Item Specification Rated Voltage (V) 450 Rated Current (A) 80 Fuse Rated Current (A) 125 Fuse Melting Time Rated Current × 110% ...

Kia Niro 2017 (DE HEV) Service Manual: Description and operation
Description • The hybrid motor system is equipped with two electric motors - HSG and drive motor. • The traction motor operates to move the vehicle, to reduce Noise, Vibration, and Harshness (NVH) while driving and to improve fuel eff ...