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    â€¢ 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: PTC Heater. Repair procedures

    InspectionOperating Logic Test (Manual only)Inspect the PTC operation by confirmation logic as follows.1.Entering(1)Set the Floor mode and maximum heating position.(2)Turn off the blower switch.(3)Press the intake (recirculation) button 5 times or more.

    Hyundai Ioniq (AE) 2017-2022 Service & Repair Manual: Repair procedures

    Self Diagnosis1.Self-diagnosis process.    â€¢ When operating the self-diagnostics, the below fault (self-diagnostics code) will blink at 0.5 seconds interval on the temperature display settings (driver's side only) and the remaining symbols are OFF .

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