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

    HPCU (Hybrid Power Control Unit). 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...

    HCU (Hybrid Control Unit). 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...

    Other information:

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    Categories

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