Kia Niro: High Voltage Battery System / Power Relay Assembly (PRA) Repair procedures

Kia Niro 2017 (DE HEV) Service Manual / Hybrid Control System / High Voltage Battery System / Power Relay Assembly (PRA) 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 instructions may result in serious electrical injuries.

•	Be sure to shut off the high voltage before doing any work related with the high voltage system(Refer to "High Voltage Shut-off Procedure"). Failure to follow the safety instructions may result in serious electrical injuries.

1.	Shut off the high voltage circuit. (Refer to Hybrid Control System - “High Voltage Shutoff Procedure”)

2.	Remove the rear seat cushion. (Refer to Body - "Rear Seat Assembly")

3.	Remove the rear door scuff trim. (Refer to Body - "Door Scuff Trim")

4.	Remove the cooling duct. (Refer to High Voltage Battery Cooling System - "Cooling Duct")

Remove the upper frame (A) after loosening the mounting bolts and nuts.

High voltage battery system assembly upper frame mounting bolt :

19.6 - 29.4 N·m (2.0 - 3.0 kgf·m, 14.5 - 21.7 lb·ft)

High voltage battery system assembly upper frame mounting nut (M8) :

19.6 - 29.4 N·m (2.0 - 3.0 kgf·m, 14.5 - 21.7 lb·ft)

High voltage battery system assembly upper frame mounting nut (M6) :

7.8 - 11.8 N·m (0.8 - 1.2 kgf·m, 5.8 - 8.7 lb·ft)

Remove the high voltage battery rear cover (A) after loosening the mounting bolts and nuts.

High voltage battery rear cover mounting bolt / nut :

7.8 - 11.8 N·m (0.8 - 1.2 kgf·m, 5.8 - 8.7 lb·ft)

7.	Disconnect the high voltage power cable [+] (A) and high voltage cable [-] (B) after loosening the mounting bolts.

8.	Disconnect the BMS ECU extension connector (A), battery current sensor connector (B), inverter power connector [-] (C), inverter power connector [+] (D), and PRA connector (E).

Remove the power relay connector after loosening the mounting nuts (A).

Power relay assembly mounting nut :

7.8 - 11.8 N·m (0.8 - 1.2 kgf·m, 5.8 - 8.7 lb·ft)

Installation

•	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 shut off the high voltage before doing any work related with the high voltage system(Refer to "High Voltage Shut-off Procedure"). Failure to follow the safety instructions may result in serious electrical injuries.

1.	Install the power relay assembly in the reverse order of removal.

Power Relay Assembly (PRA) Description and operation

Description 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 th ...

Case Repair procedures

Removal • Be sure to read and follow the “General Safety Information and Caution” ...

Other information:

Kia Niro (DE HEV) Owners Manual: Low tire pressure telltale
When the tire pressure monitoring system warning indicators are illuminated and warning massage displayed on the cluster LCD display, one or more of your tires is significantly under-inflated. The low tire pressure position telltale light will indicate which tire is significantly under-inf ...

Kia Niro 2017 (DE HEV) Service Manual: Drive Belt Repair procedures
Removal 1. Remove the engine room under cover. (Refer to Engine and Transaxle Assembly - "Engine Room Under Cover") 2. Remove the drive belt. (1) Using the wrench, turning the mechanical tensioner (A) c ...