LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Hyundai >> 2021 >> Sonata Limited >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System - 1.6L (Except HEV) >> Engine Control Module (ECM) >> Schematic Diagrams >> ECM Terminal and Input/Output signal >> ECM Terminal Function
April 5, 2026: LEMON Manuals is launched! Read the announcement.

ECM Terminal Function

CONNECTOR A DESCRIPTION

Terminal Description
1 Fuel Pressure Regulator Valve (FPRV) [High] Control
2 Integrated Thermal Management Module (ITM) Motor (+)
3 Integrated Thermal Management Module (ITM) Motor (-)
4 -
5 Engine Coolant Temperature Sensor (ECTS) #1 Ground
6 -
7 Engine Coolant Temperature Sensor (ECTS) #2 Ground
8 -
9 Rail Pressure Sensor (RPS) Ground
10 Exhaust Gas Temperature Sensor (EGTS) Ground
11 Manifold Absolute Pressure Sensor (MAPS) Ground
12 Electric Waste Gate Control Actuator (EWGA) Ground
13 -
14 Oil Temperature Sensor (OTS) Ground
15 Electric Exhaust Gas Recirculation (EEGR) Control Valve Ground
16 -
17 A/C Pressure Transducer (APT) Ground
18 Sensor Power (+5V) Camshaft Position Sensor (CMPS) [Bank 1/Intake, Exhaust]
19 Sensor Power (+5V) Manifold Absolute Pressure Sensor (MAPS)
Sensor Power (+5V) Electric Exhaust Gas Recirculation (EEGR)
Sensor Power (+5V) Crankshaft Position Sensor (CKPS)
20 Sensor Power (+5V) Oil Pressure Sensor (OPS)
Sensor Power (+5V) Electric Throttle Control Module (ETC)
Sensor Power (+5V) Rail Pressure Sensor (RPS)
21 Throttle Position Sensor (TPS) Ground
22 Electric Exhaust Gas Recirculation (EEGR) Control Valve Motor (+)
23 Electric Exhaust Gas Recirculation (EEGR) Control Valve Motor (-)
24 -
25 -
26 Ignition Coil (Cylinder #3) Control
27 -
28 -
29 -
30 -
31 -
32 -
33 -
34 -
35 Integrated Thermal Management Module (ITM) Motor Ground
36 -
37 Camshaft Position Sensor (CMPS) [Bank 1/Intake] Signal
38 -
39 Electric Waste Gate Control Actuator (EWGA) Signal
40 Sensor Power (+5V) Electric Waste Gate Control Actuator (EWGA)
41 Sensor Power (+5V) Accelerator Position Sensor (APS #1)
42 Sensor Power (+5V) A/C Pressure Transducer (APT)
43 Injector (Cylinder #3) [+] Control
44 Injector (Cylinder #2) [+] Control
45 -
46 -
47 Local-CAN #1 [High] SBW Control Unit (SCU)
Local-CAN #1 [High] Shift By Wire (SBW)
Local-CAN #1 [High] Continuous Variable Valve Duration (CVVD) Actuator
48 Ignition Coil (Cylinder #1) Control
49 -
50 -
51 -
52 -
53 -
54 -
55 -
56 -
57 -
58 Differential Pressure Sensor (DPS) Signal
59 Exhaust Gas Temperature Sensor (EGTS) Signal
60 Camshaft Position Sensor (CMPS) [Bank 1/Exhaust] Ground
61 Mass Air Flow Sensor (MAFS) Signal
62 -
63 Engine Speed Signal Output
64 Injector (Cylinder #1) [+] Control
65 Injector (Cylinder #4) [+] Control
66 Injector (Cylinder #3) [-] Control
67 Injector (Cylinder #4) [-] Control
68 Ignition Coil (Cylinder #2) Control
69 Local-CAN #1 [Low] SBW Control Unit (SCU)
Local-CAN #1 [Low] Shift By Wire (SBW)
Local-CAN #1 [Low] Continuous Variable Valve Duration (CVVD) Actuator
70 Camshaft Position Sensor (CMPS) [Bank 1/Exhaust] Signal
71 Crankshaft Position Sensor (CKPS) Ground
72 -
73 Oil Pressure Sensor (OPS) Signal
74 Intake Air Temperature Sensor (IATS) Signal
75 Engine Coolant Temperature Sensor (ECTS) #1 Signal
76 Engine Coolant Temperature Sensor (ECTS) #2 Signal
77 Electric Exhaust Gas Recirculation (EEGR) Control Valve Signal
78 -
79 Throttle Position Sensor (TPS) #2 Signal
80 Rail Pressure Sensor (RPS) Signal
81 -
82 Integrated Thermal Management Module (ITM) Motor Signal
83 Mass Air Flow Sensor (MAFS) Ground
84 A/C Pressure Transducer (APT) Signal
85 -
86 Injector (Cylinder #2) [-] Control
87 Injector (Cylinder #1) [-] Control
88 Fuel Pressure Regulator Valve (FPRV) [Low] Control
89 Differential Pressure Sensor (DPS) Ground
90 Ignition Coil (Cylinder #4) Control
91 Crankshaft Position Sensor (CKPS) Signal
92 Integrated Body Control unit (IBU) External Wake-Up Signal
93 Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 2] Ground
94 -
95 Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 2] Signal
96 -
97 Oil Temperature Sensor (OTS) Signal
98 Throttle Position Sensor (TPS) #1 Signal
99 -
100 -
101 Manifold Absolute Pressure Sensor (MAPS) Signal
102 Camshaft Position Sensor (CMPS) [Bank 1/Intake] Ground
103 -
104 Knock Sensor (KS) Signal
105 Knock Sensor (KS) Ground
CONNECTOR B DESCRIPTION

Terminal Description
1 Chassis Ground
2 Chassis Ground
3 Battery Power (B+) (Main Relay)
4 Chassis Ground
5 Battery Power (B+) (Main Relay)
6 Battery Power (B+) (Main Relay)
7 -
8 -
9 Sensor Power (+5V) (Integrated Thermal Management Module (ITM) Motor)
Sensor Power (+5V) (Mass Air Flow Sensor (MAFS))
10 Sensor Power (+5V) (Accelerator Position Sensor (APS) #2)
11 Boost Pressure Sensor (BPS) Signal Input
12 Accelerator Position Sensor (APS) #2 Ground
13 Accelerator Position Sensor (APS) #1 Ground
14 Brake Booster Vacuum Pressure Sensor (BBVPS) Ground
15 Fuel Tank Pressure Sensor (FTPS) Ground
16 Boost Pressure Sensor (BPS) Ground
17 Fuel Level Sender (FLS) Signal
18 Accelerator Position Sensor (APS #2) Signal
19 -
20 -
21 -
22 RCV (Recirculation Valve) Control Solenoid Valve (VOP) Control
23 Cooling Fan Relay [PWM] Control
24 Electric Waste Gate Control Actuator (EWGA) DC Motor (+) Control
25 Electric Waste Gate Control Actuator (EWGA) DC Motor (-) Control
26 Ignition Switch Signal Input
27 Sensor Power (+5V) (Differential Pressure Sensor (DPS))
Sensor Power (+5V) (Boost Pressure Sensor (BPS))
28 -
29 -
30 Brake Light Switch Signal Input
31 Brake Test Switch Signal Input
32 Accelerator Position Sensor (APS #1) Signal
33 -
34 ISG OFF Switch Signal Input
35 Start Signal Input
36 -
37 Canister Close Valve (CCV) Signal [With Smart Key]
Fuel Pump Relay Control [W/O Smart Key]
38 DC/DC Converter (LDC) Control
39 -
40 Variable Oil Pump Valve Control
41 ETC Motor [+] Control
42 ETC Motor [-] Control
43 Sensor Power (+5V) (Fuel Tank Pressure Sensor (FTPS))
44 -
45 P-CAN (Low)
46 Fuel Tank Pressure Sensor (FTPS) Signal
47 -
48 -
49 Wiper Switch Signal Input
50 -
51 Start Relay Control (Low Side)
52 -
53 -
54 Rear Defrost Switch Signal Input
55 -
56 -
57 -
58 -
59 -
60 Battery Power (B+) (Battery)
61 LIN Communication Signal input
62 P-CAN (High)
63 Brake Booster Vacuum Pressure Sensor (BBVPS) Signal
64 Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1] VS+ (NERNST Cell Voltage)
65 Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1] Rc (Compensative Resistance)
66 Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1] Rc/Rp (Pump Cell Voltage)
67 Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1] VS-/IP- (Common Ground for VS, IP)
68 -
69 A/C Compressor Relay Control
70 -
71 Start Relay Control (High side)
72 -
73 -
74 Engine Control Relay Control
75 Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1] Heater Control
76 Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 2] Heater Control
77 Vehicle Speed Signal Input (Integrated Body Control Unit (IBU))
Vehicle Speed Signal Input (Vehicle Dynamic Control (VDC) Module)
78 Local-CAN (CVVD) [High] (SBW Control Unit (SCU))
Local-CAN (CVVD) [High] (Shift By Wire (SBW))
Local-CAN (CVVD) [High] (Continuous Variable Valve Duration (CVVD) Actuator)
79 Local-CAN (CVVD) [Low] (SBW Control Unit (SCU))
Local-CAN (CVVD) [Low] (Shift By Wire (SBW))
Local-CAN (CVVD) [Low] (Continuous Variable Valve Duration (CVVD) Actuator)
80 Local-CAN #2 [High] (CAN Check)
81 Local-CAN #2 [Low] (CAN Check)
82 -
83 Purge Control Solenoid Valve (PCSV) Control
84 Canister Close Valve (CCV) Signal [W/O Smart Key]
Fuel Pump Relay Control [With Smart Key]
85 ISG OFF Switch (IND.)
86 -
87 Integrated Body Control Unit (IBU) (IMMO, Data Line)
88 -
89 -
90 -
91 -
92 Variable Force Solenoid (VFS) [Bank 1/Intake] Control
93 Variable Force Solenoid (VFS) [Bank 1/Exhaust] Control