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Home >> Hyundai >> 2018 >> Elantra SE, Standard Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System - 2.0L >> Engine Control Module (ECM) >> Schematic Diagrams >> ECM Terminal And Input/Output signal >> ECM Terminal Input/Output signal >> Connector [C300-B]
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Connector [C300-B]

Pin No. Description Condition Type Level
1 Power ground Idle DD Max. 0Va.5m
2 Power ground Idle DC Max. 50mV
3 Battery power (B+) IG OFF DC Max. 0.5V
IG ON Battery Voltage
4 Power ground Idle DC Max. 50mV
5 Battery power (B+) IG OFF DC Max. 0.5V
IG ON Battery Voltage
6 Battery power (B+) IG OFF DC Max. 0.5V
IG ON Battery Voltage
7 -      
8 FLEX-RAY (High)      
9 -      
10 Accelerator Position Sensor (APS) 2 signal input Idle Analog Min. 0.6V - Max. 4.3V
11 A/C Pressure Transducer (APT) signal input      
12 -      
13 -      
14 Sensor power (+5V) IG OFF DC Max. 0.5V
IG ON Min. 4.75V - Max. 5.25V
15 -      
16 Sensor power (+5V) IG OFF DC Max. 0.5V
IG ON Min. 4.75V - Max. 5.25V
17 Sensor power (+5V) IG OFF DC Max. 0.5V
IG ON Min. 4.75V - Max. 5.25V
18 Main Relay control output Relay OFF DC Battery Voltage
Relay ON Min. -.03V - Max. 1.2V
19 Fuel Pump Relay control output Relay OFF DC Battery Voltage
Relay ON Min. -.03V - Max. 1.2V
20 -      
21 -      
22 Injector (Cylinder #2) control output Idle DC Hi: Battery voltage
LO: Max. 0.5V 48-50V
23 Injector (Cylinder #3) control output Idle DC Hi: Battery voltage
LO: Max. 0.5V 48-50V
24 -      
25 FLEX-RAY (Low)      
26 Electrical signal input [Blower Max. Switch]      
27 Accelerator Position Sensor (APS) 1 signal input Idle Analog Min. 0.6V - Max. 4.3V
28 Sensor ground Idle DC Max. 50mV
29 Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 2] signal input Idle Analog DC Min. 0.6V - Max. 1.0V
30 Fuel Tank Pressure Sensor signal input      
31 -      
32 -      
33 -      
34 Start Motor control switch Switch ON Digital Battery voltage
Switch OFF Min. -0.3V - Max. 0.5V
35 CVVT Oil Control (OCV) Valve [Bank 1/Exhaust] control output Idle PWM Operating freq. range: 300Hz
Duty rate: 0% - 100%
36 CVVT Oil Control (OCV) Valve [Bank 1/Intake] #1 control output Idle PWM Operating freq. range: 300Hz
Duty rate: 0% - 100%
37 -      
38 A/C Relay control output Relay OFF DC Battery Voltage
Relay ON   Min. -.03V - Max. 1.2V
39 Injector (Cylinder #4) control output Idle DC Hi: Battery voltage
LO: Max. 0.5V
48-50V
40 Ignition Coil (Cylinder #2) control output Idle Pulse Turn on: Max. 1.6V
Ignition Coil (Cylinder #3) control output Turn off: Battery voltage
41 Battery power (B+) IG OFF DC Max. 0.5V
IG ON Battery Voltage
42 -      
43 -      
44 -      
45 Sensor ground Idle DC Max. 50mV
46 Sensor ground Idle DC Max. 50mV
47 Sensor ground Idle DC Max. 50mV
48 -      
49 -      
50 Sensor ground Idle DC Max. 50mV
51 -      
52 -      
53 -      
54 Canister Close Valve (CCV) control output      
55 CVVT Oil Control (OCV) Valve [Bank 1/Intake] #2 control output      
56 Injector (Cylinder #1) control output Idle DC Hi: Battery voltage
LO: Max. 0.5V
48-50V
57 Ignition Coil (Cylinder #1) control output Idle Pulse Turn on: Max. 1.6V
Ignition Coil (Cylinder #4) control output Turn off: Battery voltage
58 -      
59 -      
60 C-CAN [Low] RECESSIVE Pulse 2.0~3.0V
DOMINANT 0-0.5V
61 Fuel Tank Level Sensor signal input      
62 -      
63 -      
64 -      
65 Brake Light Switch signal input Switch ON Digital Battery voltage
Switch OFF Min. -0.3V - Max. 0.5V
66 Start signal input      
67 Engine speed signal output Idle Frequency Around 26Hz at 850 RPM, idle
Around 16Hz at 3000 RPM
68 Immobilizer communication line When Pulse Hi: Min. 8.5V
communicating
after IG ON
  Lo: Max. 3.5V
69 -      
70 -      
71 Purge Control Solenoid Valve (PCSV) control output Relay OFF DC Battery voltage
    Relay ON   Max. 1.76V
72 Electronic Thermo Sensor signal input      
73 Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1] Heater control output Relay OFF DC Battery voltage
Relay ON Max. 0.5V
74 Ignition Coil (Cylinder #2) control output Idle Pulse Turn on: Max. 1.6V
Ignition Coil (Cylinder #3) control output Turn off: Battery voltage
75 -      
76 -      
77 C-CAN [High] RECESSIVE Pulse 2.0~3.0V
DOMINANT 2.75~4.5V
78 -      
79 Vehicle speed signal input Idle Frequency Duty rate 40% - 60%
80 Electrical load signal input [Wiper]      
81 -      
82 -      
83 Brake Test Switch signal input Switch ON Digital Battery voltage
Switch OFF Min. -0.3V - Max. 0.5V
84 -      
85 LIN communication      
86 Cooling Fan Relay [Low] control output IG OFF PWM Battery voltage
IG ON Min. -0.3V - Max. 1.2V
87 Cooling Fan Relay [High] control output IG OFF DC Battery voltage
IG ON Min. -0.3V - Max. 1.2V
88 Variable Intake Solenoid (VIS) Valve control output      
89 -      
90 Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 2] Heater control output Relay OFF DC Battery voltage
Relay ON Max. 0.5V
91 Ignition Coil (Cylinder #1) control output Idle Pulse Turn on: Max. 1.6V
Ignition Coil (Cylinder #4) control output Turn off: Battery voltage