Hyundai Ioniq: Hybrid Control System / HCU (Hybrid Control Unit). Schematic diagrams

Hyundai Ioniq (AE) 2017-2024 Service Manual / Hybrid Control System / Hybrid Control System / HCU (Hybrid Control Unit). Schematic diagrams

HCU Terminal and Input / Output Signal

Terminal Function
Connector [C133-S]
Pin No
Description
Connected to
1
HCU Ground
Chassis ground
2
HCU Ground
Chassis ground
3
HCU Ground
Chassis ground
4
Battery power (B+)
Battery
5
Battery power (B+)
Battery
6
Battery power (B+)
Battery
7
-
　
8
-
　
9
-
　
10
-
　
11
-
　
12
-
　
13
-
　
14
-
　
15
Brake Switch 2 signal input
Brake Switch (NC, IG1)
16
Brake Switch 1 signal input
Brake Switch (NO, B+)
17
-
　
18
-
　
19
-
　
20
-
　
21
-
　
22
-
　
23
-
　
24
-
　
25
-
　
26
-
　
27
-
　
28
-
　
29
-
　
30
-
　
31
-

32
-

33
-

34
-
　
35
-
　
36
-
　
37
-
　
38
Start signal input
Smart Key Unit
39
-
　
40
-
　
41
-
　
42
-
　
43
-
　
44
-
　
45
-
　
46
-
　
47
-
　
48
-
　
49
-
　
50
-
　
51
-
　
52
-
　
53
-
　
54
-
　
55
-
　
56
-
　
57
-
　
58
-
　
59
-
　
60
-
　
61
-
　
62
-
　
63
-
　
64
-
　
65
-
　
66
-
　
67
-
　
68
-
　
69
-
　
70
-
　
71
-
　
72
-
　
73
IGN signal input
Smart Key Unit
74
-
　
75
-
　
76
-
　
77
-
　
78
Powertrain CAN [High] signal input
Other control modules
79
Powertrain CAN [Low] signal input
Other control modules
80
-
　
81
Hybrid CAN [High] signal input
Other control modules
82
Hybrid CAN [Low] signal input
Other control modules
83
-
　
84
-
　
85
-
　
86
-
　
87
-
　
88
-
　
89
-
　
90
-
　
91
-
　
92
-
　
93
-
　
94
-
　

Input/Output signal
Connector [C133-S]
Pin no
Description
Condition
Type
Level
1
HCU Ground
Always
DC Voltage
Max. 50 mV
2
HCU Ground
Always
DC Voltage
Max. 50 mV
3
HCU Ground
Always
DC Voltage
Max. 50 mV
4
Battery power (B+)
Always
DC Voltage
Battery Voltage
5
Battery power (B+)
Always
DC Voltage
Battery Voltage
6
Battery power (B+)
Always
DC Voltage
Battery Voltage
7
-
　
　
　
8
-
　
　
　
9
-
　
　
　
10
-
　
　
　
11
-
　
　
　
12
-
　
　
　
13
-
　
　
　
14
-
　
　
　
15
Brake Switch 2 signal input
IG ON
DC Voltage
Battery Voltage
16
Brake Switch 1 signal input
Always
DC Voltage
Battery Voltage
17
-
　
　
　
18
-
　
　
　
19
-
　
　
　
20
-
　
　
　
21
-
　
　
　
22
-
　
　
　
23
-
　
　
　
24
-
　
　
　
25
-
　
　
　
26
-
　
　
　
27
-
　
　
　
28
-
　
　
　
29
-
　
　
　
30
-
　
　
　
31
-



32
-



33
-



34
-
　
　
　
35
-
　
　
　
36
-
　
　
　
37
-
　
　
　
38
Start signal input
IG ST
DC Voltage
Battery Voltage
39
-
　
　
　
40
-
　
　
　
41
-
　
　
　
42
-
　
　
　
43
-
　
　
　
44
-
　
　
　
45
-
　
　
　
46
-
　
　
　
47
-
　
　
　
48
-
　
　
　
49
-
　
　
　
50
-
　
　
　
51
-
　
　
　
52
-
　
　
　
53
-
　
　
　
54
-
　
　
　
55
-
　
　
　
56
-
　
　
　
57
-
　
　
　
58
-
　
　
　
59
-
　
　
　
60
-
　
　
　
61
-
　
　
　
62
-
　
　
　
63
-
　
　
　
64
-
　
　
　
65
-
　
　
　
66
-
　
　
　
67
-
　
　
　
68
-
　
　
　
69
-
　
　
　
70
-
　
　
　
71
-
　
　
　
72
-
　
　
　
73
IGN Signal input
IG ON
DC Voltage
Battery Voltage
74
-
　
　
　
75
-
　
　
　
76
-
　
　
　
77
-
　
　
　
78
Powertrain CAN [High] signal input
IG ON
Pulse
Dominant : 2.75 - 4.5 (3.5)V
Receive : 2.0 - 3.0 (2.5)V
79
Powertrain CAN [Low] signal input
IG ON
Pulse
Receive : 2.0 - 3.0 (2.5)V
Dominant : 0.5 - 2.25 (1.5)V
80
-
　
　
　
81
Hybrid CAN [High] signal input
IG ON
Pulse
Dominant : 2.75 - 4.5 (3.5)V
Receive : 2.0 - 3.0 (2.5)V
82
Hybrid CAN [Low] signal input
IG ON
Pulse
Receive : 2.0 - 3.0 (2.5)V
Dominant : 0.5 - 2.25 (1.5)V
83
-
　
　
　
84
-
　
　
　
85
-
　
　
　
86
-
　
　
　
87
-
　
　
　
88
-
　
　
　
89
-
　
　
　
90
-
　
　
　
91
-
　
　
　
92
-
　
　
　
93
-
　
　
　
94
-
　
　
　

Circuit Diagram

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    Categories

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    The front seat can be adjusted by using the levers located on the outside of the seat cushion. Before driving, adjust the seat to the proper position so that you can easily control the steering wheel, foot pedals and controls on the instrument panel.

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