Kia Soul EV: High Voltage Battery Control System / Battery Management System (BMS) ECU Repair procedures

Kia Soul EV (PS EV) 2015-2020 Service Manual / EV Battery System / High Voltage Battery Control System / Battery Management System (BMS) ECU Repair procedures

Inspection
C-CAN Terminating Resistance Inspection (Multi Purpose Check Connector)
1.
Turn the ignition OFF.
2.
Measure the resistance between pins No. 20 and No. 17 of multi purpose check connector (20 pins).
Measure the resistance between pins No. 3 and No. 11 of DLC (16 pins).


Specified value : Approx. 60 ?

3.
If the measured vaule is not whithin the specification, check the terminating resistance between the BMS ECU and the Inverter.
C-CAN Terminating Resistance (BMS ECU)
1.
Turn the ignition OFF and disconnect the auxiliary battery negative (-) terminal.
2.
Lift the vehicle.
3.
After loosening the mounting nut, remove the high voltage battery front under cover (A).

4.
Disconnect the BMS ECU extension connector (A).

5.
Measure the resistance between pins No. 2 (CAN-High) and No. 9 (CAN-Low) of BMS ECU.

Specified value : Approx. 120 ?

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.
(Refer to EV Battery System - "High Voltage Shut-off Procedure")
2.
Remove the high voltage battery pack assembly.
(High Voltage Battery System - Battery Pack Assembly - "Removal")
3.
Remove the safety plug cable assembly bracket mounting bolt (A).

Safety plug cable assembly bracket mounting bolt : 7.8 ~ 11.8 N.m (0.8 ~ 1.2 kgf.m, 5.8 ~ 8.7 lb-ft)

4.
After loosening the mounting bolt, remove the upper case (A).

High voltage battery pack upper case mounting bolt: 7.8 ~ 11.8 N.m (0.8 ~ 1.2 kgf.m, 5.8 ~ 8.7 lb-ft)

5.
Remove the BMS ECU
(1)
Disconnect the connector (A).

(2)
Remove the mounting nut (B).
(3)
Remove the BMS ECU(C).

BMS ECU 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 BMS ECU in the reverse order of removal.
Battery Management System (BMS) ECU Schematic Diagrams
System Circuit Diagram Connector Location BMS ECU Connector And Terminal Function BMS ECU Terminal Function A Connector [B01-A] (35 Pin) - Voltage Measurement Connector Pin no.DescriptionCo ...

Main Relay Specifications
Specification ItemSpecificationONRated Voltage (V)450Rated Ampere (A)200Voltage Drop (V)Less than 0.1 (200A)CoilOperation Voltage (V)12Resistance (?)21.6 ~ 26.4 (20°C) ItemSpecificationNo ...

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