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

Hyundai Ioniq (AE) 2017-2024 Service 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	IG ON	Differential, Analog	14 Vpp sine wave
89	-
90	-
91	-
92	-
93	M_REZ+	Motor resolver (+) power	IG ON	Differential, Analog	14 Vpp sine wave
94	M_REZ-	Motor resolver (-) power	IG ON	Differential, Analog	14 Vpp sine wave
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	IG ON	Differential, Analog	0 - 3 Vpp sine wave
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	IG ON	Differential, Analog	0 - 3 Vpp sine wave
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	IG ON	Differential, Analog	0 - 3 Vpp sine wave
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	IG ON	Differential, Analog	0 - 3 Vpp sine wave
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
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25
26
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Hyundai Ioniq (AE) 2017-2024 Service Manual: Components and components location

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