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Home >> Hyundai >> 2005 >> Elantra GLS, 4D Hatchback, Standard >> Repair and Diagnosis >> Engine Performance >> Fuel System >> Gasoline Engine Control System >> Engine Control Module (ECM) >> Notes
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Engine Control Module (ECM): Notes

  1. ECM HARNESS CONNECTOR 
    Fig 1: Identifying ECM Harness Connector Terminals
    G03842615Courtesy of HYUNDAI MOTOR CO.
  2. ECM TERMINAL FUNCTION 
    ECM CONNECTOR TERMINALS DESCRIPTION

    Pin No. Description Connected to Remark
    1 ECM ground Chassis ground  
    2 Power stage ground Chassis ground  
    3 Direct battery voltage supply Battery  
    4 Ignition coil output 1,4 Ignition Coil #1, 4  
    5 Ignition coil output 2,3 Ignition Coil #2, 3  
    6 CAN LOW Other control modules (TCM, ABS, etc.)  
    7 CAN HIGH Other control modules (TCM, ABS, etc.)  
    8 HO2S Heater (B1/S1) HO2S (B1/S1)  
    9 HO2S Heater (B1/S2) HO2S (B1/S2)  
    10 Knock Sensor Input Knock Sensor  
    11 CVVT Oil Control Valve output CVVT Oil Control Valve  
    12 Not connected -  
    13 Not connected -  
    14 Battery Voltage Supply after Main Relay Main Relay  
    15 Not connected -  
    16 Not connected -  
    17 Wheel Speed Sensor (-) Wheel Speed Sensor  
    18 Wheel Speed Sensor (+) Wheel Speed Sensor  
    19 Linear Lambda VG HO2S (B1/S1)  
    20 Not connected -  
    21 Battery Voltage Supply after Main Relay Main Relay  
    22 Battery Voltage Supply after Ignition Key Ignition Key  
    23 Injector output (cyl. 4) Injector (cyl. 4)  
    24 Injector output (cyl. 1) Injector (cyl. 1)  
    25 Spare Sensor supply Sensors  
    26 Purge Control Solenoid Valve (PCSV) PWM output Purge Control Solenoid Valve (PCSV)  
    27 Crankshaft Position Sensor ground Crankshaft Position Sensor  
    28 Not connected -  
    29 Crankshaft Position Sensor input Crankshaft Position Sensor  
    30 Camshaft Position Sensor ground Camshaft Position Sensor  
    31 Engine Coolant Temperature Sensor input Engine Coolant Temperature Sensor  
    32 Throttle Position Sensor input Throttle Position Sensor  
    33 Fuel Tank Pressure Sensor Input Fuel Tank Pressure Sensor  
    34 Fuel Tank Pressure Sensor Ground Fuel Tank Pressure Sensor  
    35 Not connected -  
    36 Not connected -  
    37 HO2S (B1/S2) ground HO2S (B1/S2)  
    38 Throttle Position Sensor ground Throttle Position Sensor  
    39 Vehicle Speed Sensor input Vehicle Speed Sensor Without ABS
      Wheel Speed Sensor input Wheel Speed Sensor With ABS
    40 Linear Lambda VIP HO2S (B1/S1)  
    41 Linear Lambda VN HO2S (B1/S1)  
    42 HO2S (B1/S2) input HO2S (B1/S2)  
    43 Not Connected -  
    44 MAFS, IATS supply MAFS, IATS  
    45 Throttle Position Sensor supply Throttle Position Sensor  
    46 Spare Sensor supply 2 Sensors  
    47 Immobilizer Data Line Immobilizer  
    48 MAFS, IATS ground MAFS, IATS  
    49 Not connected -  
    50 Air Conditioner Compressor Switch input Triple Switch  
    51 Air Conditioner Pressure switch input Triple Switch  
    52 Oil Temperature Sensor input Oil Temperature Sensor  
    53 Linear Lambda VRC HO2S (B1/S1)  
    54 Knock Sensor ground Knock Sensor  
    55 Ignition shield ground Ignition Coil  
    56 Intake Air Temperature Sensor input MAFS, IATS  
    57 Not connected -  
    58 Air Conditioner Request Switch input Air Conditioner Request Switch  
    59 Sensor Ground Sensors  
    60 Mass Air Flow Sensor signal input MAFS  
    61 Injector output (cyl.3) Injector (cyl.3)  
    62 Injector output (cyl.2) Injector (cyl.2)  
    63 Not connected -  
    64 Cooling Fan Relay - High control output Cooling Fan Relay  
    65 Cooling Fan Relay - Low control output Cooling Fan Relay  
    66 Engine Speed signal output Tachometer  
    67 Main Relay control output Main Relay  
    68 Air Conditioner Compressor Relay control output Air Conditioner Compressor Relay  
    69 Electric Fuel Pump Relay control output Electric Fuel Pump Relay  
    70 Malfunction Indicating Lamp (MIL) output Malfunction Indicating Lamp (MIL)  
    71 Immobilizer ground Immobilizer With Immobilizer
    72 Camshaft Position Sensor input Camshaft Position Sensor  
    73 Engine Coolant Temperature Sensor ground Engine Coolant Temperature Sensor  
    74 Throttle Position PWM output    
    75 Fuel Consumption signal output Trip Computer  
    76 Oil Temperature Sensor ground Oil Temperature Sensor  
    77 Diagnostic Data Line (k-Line) Data Link Connector (DLC)  
    78 Idle Speed Control Actuator PWM output 2 (CLOSE) Idle Speed Control Actuator  
    79 Canister Close Valve Output Canister Close Valve  
    80 Idle Speed Control Actuator PWM output 1 (OPEN) Idle Speed Control Actuator  
    81 Immobilizer Lamp output Immobilizer With Immobilizer
  3. ECM TERMINAL INPUT/OUTPUT SIGNAL 
    Fig 2: ECM Terminal Input/Output Signal Description Chart (1 Of 5)
    G03842616Courtesy of HYUNDAI MOTOR CO.
    Fig 3: ECM Terminal Input/Output Signal Description Chart (2 Of 5)
    G03842617Courtesy of HYUNDAI MOTOR CO.
    Fig 4: ECM Terminal Input/Output Signal Description Chart (3 Of 5)
    G03842618Courtesy of HYUNDAI MOTOR CO.
    Fig 5: ECM Terminal Input/Output Signal Description Chart (4 Of 5)
    G03842619Courtesy of HYUNDAI MOTOR CO.
    Fig 6: ECM Terminal Input/Output Signal Description Chart (5 Of 5)
    G03842620Courtesy of HYUNDAI MOTOR CO.
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