Hyundai Ioniq: High Voltage Battery Control System / BMS ECU. Schematic diagrams

Hyundai Ioniq (AE) 2017-2024 Service Manual / Hybrid Control System / High Voltage Battery Control System / BMS ECU. Schematic diagrams

BMS ECU Terminal and Input/Output Signal

Terminal Funxtion
Connector [B01-VC] (24pin) : High Voltage Battery Cell Voltage Check Connector
Pin No
Description
Connected to
1
-
-
2
-
-
3
-
-
4
Battery Voltage [Module 1/ Cell 0] signal input
Battery Module [1]
5
Battery Voltage [Module 1/ Cell 2] signal input
Battery Module [1]
6
Battery Voltage [Module 1/ Cell 4] signal input
Battery Module [1]
7
Battery Voltage [Module 1/ Cell 6] signal input
Battery Module [1]
8
Battery Voltage [Module 1/ Cell 8] signal input
Battery Module [1]
9
Battery Voltage [Module 2/ Cell 1] signal input
Battery Module [1]
10
Battery Voltage [Module 2/ Cell 3] signal input
Battery Module [1]
11
Battery Voltage [Module 2/ Cell 5] signal input
Battery Module [1]
12
Battery Voltage [Module 2/ Cell 7] signal input
Battery Module [1]
13
-
-
14
-
-
15
-
-
16
Battery Voltage [Module 1/ Cell 1] signal input
Battery Module [1]
17
Battery Voltage [Module 1/ Cell 3] signal input
Battery Module [1]
18
Battery Voltage [Module 1/ Cell 5] signal input
Battery Module [1]
19
Battery Voltage [Module 1/ Cell 7] signal input
Battery Module [1]
20
Battery Voltage [Module 2/ Cell 0] signal input
Battery Module [1]
21
Battery Voltage [Module 2/ Cell 2] signal input
Battery Module [1]
22
Battery Voltage [Module 2/ Cell 4] signal input
Battery Module [1]
23
Battery Voltage [Module 2/ Cell 6] signal input
Battery Module [1]
24
Battery Voltage [Module 2/ Cell 8] signal input
Battery Module [1]

Connector [B01-VD] (28pin) : High Voltage Battery Cell Voltage Check Connector
Pin No
Description
Connected to
1
-
　-
2
-
　-
3
-
　-
4
-
　-
5
Battery Voltage [Module 3/ Cell 1] signal input
Battery Module [2]
6
Battery Voltage [Module 3/ Cell 3] signal input
Battery Module [2]
7
Battery Voltage [Module 3/ Cell 5] signal input
Battery Module [2]
8
Battery Voltage [Module 3/ Cell 7] signal input
Battery Module [2]
9
Battery Voltage [Module 4/ Cell 0] signal input
Battery Module [2]
10
Battery Voltage [Module 4/ Cell 2] signal input
Battery Module [2]
11
Battery Voltage [Module 4/ Cell 4] signal input
Battery Module [2]
12
Battery Voltage [Module 4/ Cell 6] signal input
Battery Module [2]
13
Battery Voltage [Module 4/ Cell 8] signal input
Battery Module [2]
14
-
-
15
-
-
16
-
-
17
-
-
18
Battery Voltage [Module 3/ Cell 0] signal input
Battery Module [2]
19
Battery Voltage [Module 3/ Cell 2] signal input
Battery Module [2]
20
Battery Voltage [Module 3/ Cell 4] signal input
Battery Module [2]
21
Battery Voltage [Module 3/ Cell 6] signal input
Battery Module [2]
22
Battery Voltage [Module 3/ Cell 8] signal input
Battery Module [2]
23
Battery Voltage [Module 4/ Cell 1] signal input
Battery Module [2]
24
Battery Voltage [Module 4/ Cell 3] signal input
Battery Module [2]
25
Battery Voltage [Module 4/ Cell 5] signal input
Battery Module [2]
26
Battery Voltage [Module 4/ Cell 7] signal input
Battery Module [2]
27
-
-
28
-
-

Connector [B01-VE] (40pin) : High Voltage Battery Cell Voltage Check Connector
Pin No
Description
Connected to
1
Battery Voltage [Module 5/ Cell 0] signal input
Battery Module [3]
2
Battery Voltage [Module 5/ Cell 2] signal input
Battery Module [3]
3
Battery Voltage [Module 5/ Cell 4] signal input
Battery Module [3]
4
Battery Voltage [Module 5/ Cell 6] signal input
Battery Module [3]
5
Battery Voltage [Module 5/ Cell 8] signal input
Battery Module [3]
6
Battery Voltage [Module 6/ Cell 1] signal input
Battery Module [3]
7
Battery Voltage [Module 6/ Cell 3] signal input
Battery Module [3]
8
Battery Voltage [Module 6/ Cell 5] signal input
Battery Module [3]
9
Battery Voltage [Module 6/ Cell 7] signal input
Battery Module [3]
10
Battery Voltage [Module 7/ Cell 0] signal input
Battery Module [4]
11
Battery Voltage [Module 7/ Cell 2] signal input
Battery Module [4]
12
Battery Voltage [Module 7/ Cell 4] signal input
Battery Module [4]
13
Battery Voltage [Module 7/ Cell 6] signal input
Battery Module [4]
14
Battery Voltage [Module 7/ Cell 8] signal input
Battery Module [4]
15
Battery Voltage [Module 8/ Cell 1] signal input
Battery Module [4]
16
Battery Voltage [Module 8/ Cell 3] signal input
Battery Module [4]
17
Battery Voltage [Module 8/ Cell 5] signal input
Battery Module [4]
18
Battery Voltage [Module 8/ Cell 7] signal input
Battery Module [4]
19
-
-
20
-
-
21
Battery Voltage [Module 5/ Cell 1] signal input
Battery Module [3]
22
Battery Voltage [Module 5/ Cell 3] signal input
Battery Module [3]
23
Battery Voltage [Module 5/ Cell 5] signal input
Battery Module [3]
24
Battery Voltage [Module 5/ Cell 7] signal input
Battery Module [3]
25
Battery Voltage [Module 6/ Cell 0] signal input
Battery Module [3]
26
Battery Voltage [Module 6/ Cell 2] signal input
Battery Module [3]
27
Battery Voltage [Module 6/ Cell 4] signal input
Battery Module [3]
28
Battery Voltage [Module 6/ Cell 6] signal input
Battery Module [3]
29
Battery Voltage [Module 6/ Cell 8] signal input
Battery Module [3]
30
Battery Voltage [Module 7/ Cell 1] signal input
Battery Module [4]
31
Battery Voltage [Module 7/ Cell 3] signal input
Battery Module [4]
32
Battery Voltage [Module 7/ Cell 5] signal input
Battery Module [4]
33
Battery Voltage [Module 7/ Cell 7] signal input
Battery Module [4]
34
Battery Voltage [Module 8/ Cell 0] signal input
Battery Module [4]
35
Battery Voltage [Module 8/ Cell 2] signal input
Battery Module [4]
36
Battery Voltage [Module 8/ Cell 4] signal input
Battery Module [4]
37
Battery Voltage [Module 8/ Cell 6] signal input
Battery Module [4]
38
Battery Voltage [Module 8/ Cell 8] signal input
Battery Module [4]
39
-
-
40
-
-

Connector [B01-T] (12pin) : High Voltage Battery Temperatue Sensor Check Connector
Pin No
Description
Connected to
1
Battery Temperatue Sensor [Module 1] signal input
Battery Temperatue Sensor
2
Battery Temperatue Sensor [Module 4] signal input
Battery Temperatue Sensor
3
-
-
4
Battery Temperatue Sensor [Air Inlet] signal input
Battery Temperatue Sensor
5
-
-
6
-
-
7
Sensor ground [Module 1]
Battery Temperatue Sensor 
8
Sensor ground [Module 4]
Battery Temperatue Sensor
9
-
-
10
Sensor ground [Air Inlet]
Battery Temperatue Sensor
11
-
-
12
-
-

Connector [B01-S] (32pin) : High Voltage Battery Control Connector
Pin No
Description
Connected to
1
Battery Power (B+)
BMS Extension Connector BF11 (1)
2
Battery Power (B+)
BMS Extension Connector BF11 (11)
3
Battery Power (B+)
BMS Extension Connector BF11 (12)
4
Cooling fan feedback signal input
BMS Blower Motor
5
H-CAN [High]
Other Control Module
6
H-CAN [Low]
Other Control Module
7
P-CAN [High]
Other Control Module
8
P-CAN [Low]
Other Control Module
9
-
-
10
-
-
11
Sensor Power (+5V)
Battery Current Sensor [PRA]
12
Battery Current Sensor signal input
Battery Current Sensor [PRA]
13
-
-
14
-
-
15
Pre-Charge Relay Control
Pre-Charge Relay
16
Main Relay [+] Control
Main Relay [+]
17
Ground
Chassis Ground
18
Ground
Chassis Ground
19
Cooling Fan Relay Control
BMS Extension Connector BF11 (4)
20
Cooling Fan Speed signal input
BMS Blower Motor
21
-
-
22
-
-
23
-
-
24
Clash signal input
BMS Extension Connector BF11 (18)
25
Safety Plug Interlock signal input
Safety Plug
26
-

27
Sensor ground
Battery Current Sensor [PRA]
28
-
-
29
-
-
30
VPD Relay Control
VPD Relay
31
-
-
32
Main Relay [-] Control
Main Relay [-]

Circuit Diagram

    Schematic diagrams

    S..

    BMS ECU. Repair procedures

    Removal1.Shut off the high voltage.(Refer to Hybrid Control System - "High Voltage Shut-off Procedures")2.Remove the rear seat cushion.(Refer to Body - "Rear Seat Assembly")3...

    Other information:

    Hyundai Ioniq (AE) 2017-2024 Service Manual: Schematic diagrams


    T..

    Hyundai Ioniq (AE) 2017-2024 Service Manual: Specifications


    S..

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