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Home >> Hyundai >> 2021 >> Ioniq Plug-In Hybrid Limited >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (PHEV) >> Engine Control Module (ECM) >> Schematic Diagrams >> ECM Terminal And Input/Output Signal >> Connector [K]
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Connector [K]

Pin No Description Connected to
1 ECM Ground Chassis Ground
2 Battery power (B+) Main Relay
3 ECM Ground Chassis Ground
4 Battery power (B+) Main Relay
5 ECM Ground Chassis Ground
6 Battery power (B+) Main Relay
7 Fuel Pressure Control Valve [High] control output Fuel Pressure Control Valve
8 -  
9 -  
10 Engine Coolant Temperature Sensor (ECTS) signal [EGR Cooler Tube] Engine Coolant Temperature Sensor (ECTS) [EGR Cooler Tube]
11 Sensor ground Engine Coolant Temperature Sensor (ECTS) [EGR Cooler Tube]
12 Vehicle speed signal input Integrated brake actuation unit
Smart key Control Module
13 -  
14 -  
15 Accelerator Position Sensor (APS) 2 signal input Accelerator Position Sensor (APS) 2
16 Sensor power (+5V) Accelerator Position Sensor (APS) 2
17 Sensor power (+5V) Manifold Absolute Pressure Sensor (MAPS)
18 Sensor power (+5V) Accelerator Position Sensor (APS) 1
19 Accelerator Position Sensor (APS) signal input Accelerator Position Sensor (APS) 1 Crankshaft Position Sensor (CKPS)
20 Sensor power (+5V) Fuel Tank Pressure Sensor (FTPS)
Evaporation Leak Check Module (ELCM)
A/C Pressure Transducer (APT)
21 -  
22 Fuel Tank Isolation Valve (FTIV) relay control Fuel Tank Isolation Valve (FTIV)
23 Evaporation Leak Check Module (ELCM) negative pressure pump ground Evaporation Leak Check Module (ELCM)
24 Fuel Pump Relay control output Fuel Pump Relay
25 -  
26 Evaporation Leak Check Module (ELCM) change over valve ground Evaporation Leak Check Module (ELCM)
27 -  
28 -  
29 Fuel Pressure Control Valve [Low] control output Fuel Pressure Control Valve
30 A/C Pressure Transducer (APT) signal input A/C Pressure Transducer (APT)
31 -  
32 Crankshaft Position Sensor (CKPS) signal input Crankshaft Position Sensor (CKPS)
33 -  
34 -  
35 -  
36 -  
37 Sensor ground Accelerator Position Sensor (APS) 2
38 Manifold Absolute Pressure Sensor (MAPS) signal input Manifold Absolute Pressure Sensor (MAPS)
39 Intake Air Temperature Sensor (IATS) signal input Intake Air Temperature Sensor (IATS)
40 Sensor ground Manifold Absolute Pressure Sensor (MAPS)
41 Sensor ground Accelerator Position Sensor (APS) 1
42 -  
43 -  
44 Mass Air Flow Sensor (MAFS) signal input Mass Air Flow Sensor (MAFS)
45 Sensor ground Mass Air Flow Sensor (MAFS)
46 Engine Control Relay control output Main Relay
47 CVVT Oil control solenoid (OCS) [Bank 1/Intake] control output CVVT Oil control solenoid (OCS) [Bank 1/Intake]
48 -  
49 -  
50 -  
51 Battery power (B+) Ignition Switch
52 -  
53 Sensor ground Fuel Tank Pressure Sensor (FTPS)
54 Sensor ground Crankshaft Position Sensor (CKPS)
55 P-CAN [High] Other control module, Data Link Connector (DLC), Multi Purpose Check Connector
56 H-CAN [High] Other control module, Data Link Connector (DLC), Multi Purpose Check Connector
57 -  
58 Immobilizer communication line Smart key Control Module
59 -  
60 Engine Coolant Temperature Sensor (ECTS) signal input [Water Temperature Control Assembly] Engine Coolant Temperature Sensor (ECTS) [Water Temperature Control Assembly]
61 Sensor ground Engine Coolant Temperature Sensor (ECTS) [Water Temperature Control Assembly]
62 Fuel Level Sender (FLS) signal input Fuel Level Sender (FLS)
63 -  
64 Ignition Coil (Cylinder #2) control output Ignition Coil (Cylinder #2)
65 Ignition Coil (Cylinder #3) control output Ignition Coil (Cylinder #3)
66 -  
67 -  
68 Cooling Fan Relay control output Cooling Fan Relay
69 -  
70 CVVT Oil Control (OCV) Valve [Bank 1/Exhaust] control output CVVT Oil Control Valve (OCV) [Bank 1/Exhaust]
71 -  
72 -  
73 Battery power (B+) Battery
74 -  
75 Sensor ground A/C Pressure Transducer (APT)
76 LIN communication signal input Battery Sensor
77 P-CAN [Low] Other control module, Data Link Connector (DLC), MultiPurpose Check Connector
78 H-CAN [Low] Other control module, Data Link Connector (DLC), MultiPurpose Check Connector
79 - 1
80 -  
81 -  
82 Fuel Tank Pressure Sensor (FTPS) signal input Fuel Tank Pressure Sensor (FTPS)
83 Evaporation Leak Check Module (ELCM) signal input (High Pressure) Evaporation Leak Check Module (ELCM)
84 Sensor ground Evaporation Leak Check Module (ELCM)
85 -  
86 Ignition Coil (Cylinder #4) control output Ignition Coil (Cylinder #4)
87 Ignition Coil (Cylinder #1) control output Ignition Coil (Cylinder #1)
88 -  
89 -  
90 -  
91 Heated Oxygen Sensor (HO2S) [Bank 1/Sensor1] Heater control output Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1]
92 Heated Oxygen Sensor (HO2S) [Bank 1/Sensor2] Heater control output Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1]
93 Purge Control Solenoid Valve (PCSV) control output Purge Control Solenoid Valve (PCSV)
94 -  

ECM Terminal Input/Output Signal 



Pin No Description Condition Type Level
1 ECM Ground Idle DC -0.3 to 0.5V
2 Battery power (B+) IG OFF DC Max 1.0V
IG ON Battery Voltage (B+)
3 ECM Ground Idle DC -0.3 to 0.5V
4 Battery power (B+) IG OFF DC Max 1.0V
IG ON Battery Voltage (B+)
5 ECM Ground Idle DC -0.3 to 0.5V
6 Battery power (B+) IG OFF DC Max 1.0V
IG ON Battery Voltage (B+)
7 Fuel Pressure Control Valve [High] control output Engine Run PWM
G13562963Courtesy of HYUNDAI MOTOR AMERICA
8 -      
9 -      
10 Engine Coolant Temperature Sensor (ECTS) signal [EGR Cooler Tube] Idle Analog 0.5-4.5V (Idle: 1.02V)
11 Sensor ground Idle DC Max 50 mV
12 Vehicle speed signal input      
13 -      
14 -      
15 Accelerator Position Sensor (APS) 2 signal input C.T Analog Max 1.0V
W.O.T 1.5-3.0V
16 Sensor power (+5V) IG OFF DC Max 50 mV
IG ON 4.9-5.1V
17 Sensor power (+5V) IG OFF DC Max 50 mV
IG ON 4.9-5.1V
18 Sensor power (+5V) IG OFF DC Max 50 mV
IG ON 4.9-5.1V
19 Accelerator Position Sensor (APS) signal input C.T Analog Max 1.0V
W.O.T Min 4.0V
20 Sensor power (+5V) IG OFF DC Max 50 mV
IG ON 4.9-5.1V
21 -      
22 Fuel Tank Isolation Valve (FTIV) relay control      
23 Evaporation Leak Check Module (ELCM) negative pressure pump ground Idle Analog -0.3 - 0.5V
24 Fuel Pump Relay control output Relay OFF DC Battery Voltage (B+)
Relay ON -0.3 to 1.2V
25 -      
26 Evaporation Leak Check Module (ELCM) change over valve ground      
27 -      
28 -      
29 Fuel Pressure Control Valve [Low] control output Engine Run PWM
G13562964Courtesy of HYUNDAI MOTOR AMERICA
30 A/C Pressure Transducer (APT) signal input A/C ON Analog 0.348 - 4.63 V
31 -      
32 Crankshaft Position Sensor (CKPS) signal input Engine Run Pulse High: 4.5-5.5V
Low: -0.3 to 0.5V
Frequency: 850 Hz (Idle), 3, 000 Hz (3, 000 rpm)
33 -      
34 -      
35 -      
36 -      
37 Sensor ground Idle DC Max 50 mV
38 Manifold Absolute Pressure Sensor (MAPS) signal input Idle Analog 0.8 - 1.6V (Idle: 1.37V)
39 Intake Air Temperature Sensor (IATS) signal input Idle Analog 0 - 5.0V (Idle: 2.55V)
40 Sensor ground Idle DC Max 50 mV
41 Sensor ground Idle DC Max 50 mV
42 -      
43 -      
44 Mass Air Flow Sensor (MAFS) signal input      
45 Sensor ground Idle DC Max 50 mV
46 Engine Control Relay control output Relay OFF DC Battery Voltage (B+)
Relay ON -0.3 to 1.2V
47 CVVT Oil control solenoid (OCS) [Bank 1/Intake] control output      
48 -      
49 -      
50 -      
51 Battery power (B+) IG OFF DC Max 1.0V
IG ON Battery Voltage (B+)
52 -      
53 Sensor ground Idle DC Max 50 mV
54 Sensor ground Idle DC Max 50 mV
55 P-CAN [High] Recessive Dominant Pulse 2.0-3.0V 2.75 - 4.5V
56 H-CAN [High] Recessive Dominant Pulse 2.0-3.0V 2.75 - 4.5V
57 Sensor ground      
58 Immobilizer communication line      
59 Sensor ground Idle Analog -0.3 ~ 0.5V
60 Engine Coolant Temperature Sensor (ECTS) signal input [Water Temperature Control Assembly]      
61 Sensor ground Idle DC Max 50 mV
62 Fuel Level Sender (FLS) signal input Idle Analog 0.55 - 4.37V
63 -      
64 Ignition Coil (Cylinder #2) control output Engine Run Pulse Vpeak = 360 - 440V 125
65 Ignition Coil (Cylinder #3) control output Engine Run Pulse Vpeak = 360 - 440V 125
66 -      
67 -      
68 Cooling Fan Relay control output      
69 -      
70 CVVT Oil Control (OCV) Valve [Bank 1/Exhaust] control output Idle Pulse High: Battery Voltage (B+) Low: -0.3 to 1.0V Frequency: 300 Hz
71 -      
72 -      
73 Battery power (B+) IG OFF DC Max 1.0V
IG ON Battery Voltage (B+)
74 -      
75 Sensor ground Idle DC Max 50 mV
76 LIN Communication signal input      
77 P-CAN [Low] Recessive Pulse 2.0-3.0V
Dominant 2.75 - 4.5V
78 H-CAN [Low] Recessive Pulse 2.0-3.0V
Dominant 2.75 - 4.5V
79 -      
80 -      
81 -      
82 Fuel Tank Pressure Sensor (FTPS) signal input Idle Analog 0.5 - 4.5V
83 Evaporation Leak Check Module (ELCM) signal input (High Pressure) Idle Analog 1.4 - 4.2V
84 Sensor ground Idle DC -0.3 - 0.5V
85        
86 Ignition Coil (Cylinder #4) control output Engine Run Pulse Vpeak = 360 - 440V 125
87 Ignition Coil (Cylinder #1) control output Engine Run Pulse Vpeak = 360 - 440V 125
88 -      
89 -      
90 -      
91 Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1] Heater control output Engine Run Pulse High: Battery Voltage (B+)
Low: -0.3 to 1.0V
Frequency: 8 - 10Hz
Duty: 0 - 100%
92 Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 2] Heater control output Engine Run Pulse High: Battery Voltage (B+)
Low: -0.3 to 1.0V
Frequency: 8 - 10 Hz
Duty: 0 - 100%
93 Purge Control Solenoid Valve (PCSV) control output Inactive Active Pulse High: Battery Voltage (B+)
Low: Max 1.0V
Vpeak: 42.0 - 60.0V
Frequency: 20 Hz
94 -      
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