Kia Niro: Hybrid Control System / Hybrid Control Unit (HCU) Schematic diagrams

Kia Niro 2017 (DE HEV) Service Manual / Service Highlight / Hybrid Control System / Hybrid Control Unit (HCU) 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
Inhibitor Switch
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
L - CAN [High]
Engine clutch Actuator
76
L - CAN [Low]
Engine clutch Actuator
77
-
　
78
Powertrain CAN [High]
Other control modules
79
Powertrain CAN [Low]
Other control modules
80
-
　
81
Hybrid CAN [High]
Other control modules
82
Hybrid CAN [Low]
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. 50mV
2
HCU ground
Always
DC Voltage
Max. 50mV
3
HCU ground
Always
DC Voltage
Max. 50mV
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
Sensor power (+5V)
IG ON
DC Voltage
4.9 - 5.1V
32
Sensor ground
IG ON
DC Voltage
Max. 50mV
33
Clutch Pressure Sensor (CPS) signal input
IG ON
Analog
0.5 - 4.5V
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
L - CAN [High]
IG ON
Pulse
　
76
L - CAN [Low]
IG ON
Pulse
　
77
-
　
　
　
78
Powertrain CAN [High]
IG ON
Pulse
Dominant:2.75 - 4.5(3.5)V
Receive:2.0 - 3.0(2.5)V
79
Powertrain CAN [Low]
IG ON
Pulse
Receive:2.0 - 3.0(2.5)V
Dominant:0.5 - 2.25(1.5)V
80
-
　
　
　
81
Hybrid CAN [High]
IG ON
Pulse
Dominant:2.75 - 4.5(3.5)V
Receive:2.0 - 3.0(2.5)V
82
Hybrid CAN [Low]
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

Hybrid Power Control Unit (HPCU) Repair procedures
Removal    • Be sure to read and follow the “General Safety Information and Caution” ...

Hybrid Control Unit (HCU) Repair procedures
Removal    • Be sure to read and follow the “General Safety Information and Caution” ...

Other information:

Kia Niro 2017 (DE HEV) Service Manual: Repair procedures
Removal 1. Disconnect the battery negative cable. 2. Turn the steering wheel so that the front wheels are facing straight ahead. 3. Remove the driver airbag module. (Refer to Restraint - "Driver Airbag (DAB) ...

Kia Niro 2017 (DE HEV) Service Manual: Description and operation
Description The SMART KEY system is a system that allows the user to access and operate a vehicle in a very convenient way. To access the vehicle, no traditional key or remote control unit is needed. The user carries a SMART KEY FOB which does not require any conscious actions b ...

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