Hyundai Ioniq (AE): Hybrid Motor Control System / Motor Control Unit(MCU). Schematic diagrams

Hyundai Ioniq (AE) 2017-2022 Service & Repair Manual / Hybrid Motor System / Hybrid Motor Control System / Motor Control Unit(MCU). Schematic diagrams

Diagram System Circuit
A high-capacity power module is applied to the two high-voltage motors.
The power module consists of a high - speed switching circuit that is isolated from the IGBT and DIODE circuits.
The capacity of the high-voltage battery is approx. 270V. But the power module needs to use a voltage of maximum 650V to ensure stability and reliability.

MCU terminal input/output signal connector

Functions of MCU Terminal
Connector (94 pins)
Terminal
Signal
Usage
5
VB1
Constant power (B+)
6
VB2
Constant power (B+)
3
GND1
Power ground
4
VB3
Constant power (B+)
1
GND2
Power ground
2
GND3
Power ground
73
IGN
Ignition
74
-

75
L_CAN_H
C_CAN_[High]
76
L_CAN_L
C_CAN_[Low]
77
-

78
P_CAN_H
P - CAN [High]
79
P_CAN_L
P - CAN [Low]
80
-

81
H_CAN_H
H - CAN [High]
82
H_CAN_L
H - CAN [Low]
83
-

84
-

85
-

86
-

87
H_REZ+
HSG resolver (+) power
88
H_REZ-
HSG resolver (-) power
89
-

90
-

91
-

92
-

93
M_REZ+
Motor resolver (+) power
94
M_REZ-
Motor resolver (-) power
51
-

52
-

53
-

54
-

55
-

56
-

57
-

58
-

59
-

60
-

61
-

62
H_REZS1
HSG resolver sensor (S1) input signal
63
H_REZS3
HSG resolver sensor (S3) input signal
64
H_REZS2
HSG resolver sensor (S2) input signal
65
H_REZS4
HSG resolver sensor (S4) input signal
66
H_REZ_S
SHEILD
67
-

68
M_REZS1
Motor resolver sensor (S1) input signal
69
M_REZS3
Motor resolver sensor (S3) input signal
70
M_REZS2
Motor resolver sensor (S2) input signal
71
M_REZS4
Motor resolver sensor (S4) input signal
72
M_REZ_S
SHEILD
29
-

30
-

31


32


33


34


35
-

36


37


38
START_SIGNAL
Start signal input signal
39
-

40
-

41
-

42
HSG_TM_GND
Sensor ground
43
HSG_TM
HSG temperature sensor input signal
44
HSG_TM_S
SHEILD
45
-

46
-

47
-

48
MOT_TM_GND
Sensor ground
49
MOT_TM
Motor temperature sensor input signal
50
MOT_TM_S
SHEILD
7
-

8
-

9
-

10
-

11
-

12
-

13
-

14
-

15
BRAKE_SW2
Brake switch 2 input signal (NC, IG1)
16
BRAKE_SW1
Brake switch 1 input signal (NO, B+)
17


18


19


20


21


22


23


24


25


26


27


28



MCU terminal input/output signal
Terminal
Signal
Usage
Condition
Type
Level
Waveform
5
VB1
Constant power (B+)
Constant
DC Voltage
Battery Power
　
6
VB2
Constant power (B+)
Constant
DC Voltage
Battery Power
　
3
GND1
Power ground
Constant
DC Voltage
Max. 50 mV
4
VB3
Constant power (B+)
Constant
DC Voltage
Battery Power
1
GND2
Power ground
Constant
DC Voltage
Max. 50 mV
2
GND3
Power ground
Constant
DC Voltage
Max. 50 mV
　
73
IGN
Ignition
IG ON
DC Voltage
Battery Power
　
74
-
75
L_CAN_H
C - CAN [High]
IG ON
Pulse
Dominant : 2.75 - 4.5 (3.5) V
Recessive : 2.0 - 3.0 (2.5) V

76
L_CAN_L
C - CAN [Low]
IG ON
Pulse
Recessive : 2.0 - 3.0 (2.5) V
Dominant : 0.5 - 2.25 (1.5) V
77
-
78
P_CAN_H
P - CAN [High]
IG ON
Pulse
Dominant : 2.75 - 4.5 (3.5) V
Recessive : 2.0 - 3.0 (2.5) V

79
P_CAN_L
P - CAN [Low]
IG ON
Pulse
Recessive : 2.0 - 3.0 (2.5) V
Dominant : 0.5 - 2.25 (1.5) V
80
-

　
　
　
　
81
H_CAN_H
H - CAN [High]
IG ON
Pulse
Dominant : 2.75 - 4.5 (3.5) V
Recessive : 2.0 - 3.0 (2.5) V

82
H_CAN_L
H - CAN [Low]
IG ON
Pulse
Recessive : 2.0 - 3.0 (2.5) V
Dominant : 0.5 - 2.25 (1.5) V
83
-




　
84
-




　
85
-
86
-
87
H_REZ+
HSG resolver (+) power
IG ON
Differential,
Analog
14 Vpp sine wave

88
H_REZ-
HSG resolver (-) power
89
-

　
　
　
　
90
-
91
-




　
92
-




　
93
M_REZ+
Motor resolver (+) power
IG ON
Differential, Analog
14 Vpp sine wave

94
M_REZ-
Motor resolver (-) power
51
-

　
　
　
　
52
-

　
　
　
　
53
-

　
　
　
　
54
-
55
-




　
56
-




　
57
-




　
58
-




　
59
-




　
60
-




　
61
-

　
　
　
　
62
H_REZS1
HSG resolver sensor (S1) input signal
IG ON
Differential, Analog
0 - 3 Vpp sine wave

63
H_REZS3
HSG resolver sensor (S3) input signal
64
H_REZS2
HSG resolver sensor (S2) input signal
IG ON
Differential, Analog
0 - 3 Vpp sine wave

65
H_REZS4
HSG resolver sensor (S4) input signal
66
H_REZ_S
SHEILD
Constant
DC Voltage
Max. 50 mV

67
-





68
M_REZS1
Motor resolver sensor (S1) input signal
IG ON
Differential, Analog
0 - 3 Vpp sine wave

69
M_REZS3
Motor resolver sensor (S3) input signal
70
M_REZS2
Motor resolver sensor (S2) input signal
IG ON
Differential, Analog
0 - 3 Vpp sine wave

71
M_REZS4
Motor resolver sensor (S4) input signal
72
M_REZ_S
SHEILD
Constant
DC Voltage
Max. 50 mV

29
-





30
-





31






32






33






34






35
-





36






37






38
START_SIGNAL
Start signal input signal
IG ST
DC Voltage
Battery voltage

39
-





40
-





41
-





42
HSG_TM_GND
Sensor ground
Constant
DC Voltage
Max. 50 mV

43
HSG_TM
HSG temperature sensor input signal
IG ON
Analog
0 - 5V

44
HSG_TM_S
SHEILD
Constant
DC Voltage
Max. 50 mV

45
-





46
-





47
-





48
MOT_TM_GND
Sensor ground
Constant
DC Voltage
Max. 50 mV

49
MOT_TM
Motor temperature sensor input signal
IG ON
Analog
0 - 5V

50
MOT_TM_S
SHEILD
Constant
DC Voltage
Max. 50 mV

7
-





8
-





9
-





10
-





11
-





12
-





13
-





14
-





15
BRAKE_SW2
Brake switch 2 input signal (NC, IG1)
IG ON
DC Voltage
Battery voltage

16
BRAKE_SW1
Brake switch 1 input signal (NO, B+)
Constant
DC Voltage
Battery voltage

17






18






19






20






21






22






23






24






25






26






27






28







    Component location1. HPCU (Hybrid Power Control Unit)(LDC+MCU+HCU+Reservoir)2. Hybrid drive motor3. Hybrid starter generator (HSG)4. Electrical radiator5.

    Removal    • MCU is integrated with HPCU. Therefore, to install / remove the MCU, follow the procedure for installing / removing the HPCU.

    Other information:

    Hyundai Ioniq (AE) 2017-2022 Service & Repair Manual: Climate Control Air Filter. Repair procedures

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    Hyundai Ioniq (AE) 2017-2022 Service & Repair Manual: Components and components location

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