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: Battery Current Sensor Specifications
Specification Battery Current Sensor Item Output Voltage (V) Max. Current (A) -300 (Charge) 0.5 0 2.5 +300 (Discharge) 4.5 Rated Current (A) ...

Kia Niro 2017 (DE HEV) Service Manual: Brake/Clutch Fluid Repair procedures
Inspection Check the brake fluid level in the brake fluid reservoir. The level should be between “MIN” and “MAX” marks on the side of the reservoir. Use only hydraulic brake fluid conforming to DOT 3 or DOT 4 specification. Check the brake system for any leakage if th ...

© 2016-2026 www.kniro.net