Hyundai Venue: Engine Control System / Description and operation

Hyundai Venue (QX) (2020-2024) Service Manual / Engine Control / Fuel System / Engine Control System / Description and operation

Description

If the Gasoline Engine Control system components (sensors, ECM, injector, etc.) fail, interruption to the fuel supply or failure to supply the proper amount of fuel for various engine operating conditions will result. The following situations may be encountered.

1.	Engine is hard to start or does not start at all.

2.	Unstable idle.

3.	Poor driveability

If any of the above conditions are noted, first perform a routine diagnosis that includes basic engine checks (ignition system malfunction, incorrect engine adjustment, etc.). Then, inspect the Gasoline Engine Control system components with the HI-SCAN (Pro).

•	Before removing or installing any part, read the diagnostic trouble codes and then disconnect the battery negative (-) terminal.

•	Before disconnecting the cable from battery terminal, turn the ignition switch to OFF. Removal or connection of the battery cable during engine operation or while the ignition switch is ON could cause damage to the ECM.

•	The control harnesses between the ECM and heated oxygen sensor are shielded with the shielded ground wires to the body in order to prevent the influence of ignition noises and radio interference. When the shielded wire is faulty, the control harness must be replaced.

•	When checking the generator for the charging state, do not disconnect the battery '+' terminal to prevent the ECM from damage due to the voltage.

•	When charging the battery with the external charger, disconnect the vehicle side battery terminals to prevent damage to the ECM.

Malfunction Indicator Lamp (MIL)

[EOBD]

A malfunction indicator lamp illuminates to notify the driver that there is a problem with the vehicle. However, the MIL will go off automatically after 3 subsequent sequential driving cycles without the same malfunction. Immediately after the ignition switch is turned on (ON position - do not start), the MIL will illuminate continuously to indicate that the MIL operates normally.

Faults with the following items will illuminate the MIL.

–

Catalyst

–	Fuel system

–	Mass Air Flow Sensor (MAFS)

–	Intake Air Temperature Sensor (IATS)

–	Engine Coolant Temperature Sensor (ECTS)

–	Throttle Position Sensor (TPS)

–	Upstream Oxygen Sensor

–	Upstream Oxygen Sensor Heater

–	Downstream Oxygen Sensor

–	Downstream Oxygen Sensor Heater

–

Injector

–

Misfire

–	Crankshaft Position Sensor (CKPS)

–	Camshaft Position Sensor (CMPS)

–	Evaporative Emission Control System

–	Vehicle Speed Sensor (VSS)

–	Idle Speed Control Actuator (ISCA)

–	Power Supply

–

ECM/ PCM

–	MT/AT Encoding

–	Acceleration Sensor

–	MIL-on Request Signal

–	Power Stage

•	Refer to "Inspection CHART FOR DIAGNOSTIC TROUBLE CODES (DTC)" for more information.

[NON-EOBD]

Faults with the following items will illuminate the MIL

–	Heated oxygen sensor (HO2S)

–	Mass Air Flow sensor (MAFS)

–	Throttle position sensor (TPS)

–	Engine coolant temperature sensor (ECTS)

–	Idle speed control actuator (ISCA)

–

Injectors

–

ECM

•	Refer to "Inspection CHART FOR DIAGNOSTIC TROUBLE CODES (DTC)" for more information.

[Inspection]

1.	After turning ON the ignition key, ensure that the light illuminates for about 5 seconds and then goes out.

2.	If the light does not illuminate, check for an open circuit in the harness, a blown fuse or a blown bulb.

Self-Diagnosis

The ECM monitors the input/output signals (some signals at all times and the others under specified conditions). When the ECM detects an irregularity, it records the diagnostic trouble code, and outputs the signal to the Data Link connector. The diagnosis results can be read with the MIL or HI-SCAN (Pro). Diagnostic Trouble Codes (DTC) will remain in the ECM as long as battery power is maintained. The diagnostic trouble codes will, however, be erased when the battery terminal or ECM connector is disconnected, or by the HI-SCAN (Pro).

•	If a sensor connector is disconnected with the ignition switch turned on, the diagnostic trouble code (DTC) is recorded. In this case, disconnect the battery negative terminal (-) for 15 seconds or more, and the diagnosis memory will be erased.

The Relation Between DTC And Driving Pattern In EOBD System

Hyundai Venue. Description and operation

1.	When the same malfunction is detected and maintained during two sequential driving cycles, the MIL will automatically illuminate.

2.	The MIL will go off automatically if no fault is detected after 3 sequential driving cycles.

A Diagnostic Trouble Code (DTC) is recorded in ECM memory when a malfunction is detected after two sequential driving cycles. The MIL will illuminate when the malfunction is detected on the second driving cycle.

If a misfire is detected, a DTC will be recorded, and the MIL will illuminate, immediately after a fault is first detected.

A Diagnostic Trouble Code (DTC) will automatically erase from ECM memory if the same malfunction is not detected for 40 driving cycles.

•	A "warm-up cycle" means sufficient vehicle operation such that the coolant temperature has risen by at least 40 degrees Fahrenheit from engine starting and reaches a minimum temperature of 160 degress Fahrenheit.

•	A "driving cycle" consists of engine startup, vehicle operation beyond the beginning of closed loop operation.

Components and components location

Components Location 1. ECM (Engine Control Module) 2. Manifold Absolute Pressure Sensor (MAPS) 3. Intake Air Temperature Sensor (IATS) 4...

Engine Control Module (ECM). Schematic diagrams

Engine Control Module (ECM) [M/T] ECM Terminal Function [M/T] Connector [A] Pin No Description Connected to 1 Injector (Cylinder #1) control output Injector (Cylinder #1) 2 Sensor power (+5V) Throttle Position Sensor (TPS) # 1, 2 [ETC module] 3 Sensor power (+5V) Accelerator Position Sensor (APS) 1 4 Main Relay control output Main Relay 5 - - 6 Alternator signal input [FR] Alternator 7 Engine coolant temperature sensor (ECTS) signal input Engine coolant temperature sensor (ECTS) 8 Sensor ground Manifold absolute pressure sensor (MAPS) 9 - 10 Sensor ground Heated Oxygen Sensor (HO2S) [Bank 1 / Sensor 2] 11 - 12 - 13 CVVT Oil Control (OCV) Valve [Bank 1/Intake] control output CVVT Oil Control Valve (OCV) [Bank 1 / Intake] 14 Sensor power (+5V) Manifold absolute pressure sensor (MAPS) 15 Sensor power (+5V) Accelerator Position Sensor (APS) #2 A/C Pressure Transducer (APT) 16 Sensor power (+5V) CMPS [Bank 1 / Intake] CMPS [Bank 1 / Exhaust] 17 Vehicle speed signal input ABS/ESP Control Module [With ABS / ESP] 18 Battery voltage supply after ignition switch Ignition Switch 19 Sensor ground Camshaft Position Sensor (CMPS) [Bank 1 / Exhaust] 20 Sensor ground A/C Pressure Transducer (APT) 21 Sensor ground Battery sensor 22 - 23 - 24 - 25 Injector (Cylinder #2) control output Injector (Cylinder #2) 26 Cooling Fan Relay [High] control output Cooling Fan Relay [High] 27 Start relay control output (With smart key) Start relay 28 Alternator control output [COM] Alternator 29 C-CAN [Low] Other control module, Data Link Connector (DLC), 30 - 31 Camshaft Position Sensor (CMPS) [Bank 1 / Exhaust] signal input Camshaft Position Sensor (CMPS) [Bank 1 / Exhaust] 32 Sensor ground Crankshaft Position Sensor (CKPS) 33 Crankshaft Position Sensor (CKPS) signal input Crankshaft Position Sensor (CKPS) 34 Sensor ground Throttle Position Sensor (TPS) 1, 2 35 Sensor ground Accelerator Position Sensor (APS) 2 36 Sensor ground Accelerator Position Sensor (APS) 1 37 Injector (Cylinder #4) control output Injector (Cylinder #4) 38 - 39 Engine RPM signal output Smart key Control Module 40 Immobilizer communication line Immobilizer Control module [Without Smart Key] Smart Key Control module [With Smart Key] 41 C-CAN [High] Other control module, Data Link Connector (DLC) 42 - 43 Purge Control Solenoid Valve control output Purge Control Solenoid Valve (PCSV) 44 - 45 Injector (Cylinder #3) control output Injector (Cylinder #3) 46 Cooling Fan Relay [Low] control output Cooling Fan Relay [Low] 47 Camshaft Position Sensor (CMPS) [Bank 1 / Intake] signal input haft Position Sensor (CMPS) [Bank 1 / Intake] 48 Battery power (B+) Battery 49 Heated Oxygen Sensor [Bank 1 / Sensor 1] Heater control output Heated Oxygen Sensor [Bank 1 / Sensor 1] 50 Power Ground Chassis Ground 51 - 52 Power Ground Chassis Ground 53 Heated Oxygen Sensor [Bank 1 / Sensor 2] Heater control output Heated Oxygen Sensor [Bank 1 / Sensor 2] 54 CVVT Oil Control (OCV) Valve [Bank 1 / Exhaust] control output CVVT Oil Control Valve (OCV) [Bank 1 / Exhaust] 55 Battery voltage supply after main relay Main relay 56 Battery voltage supply after main relay Main relay Connector [B] Pin No Description Connected to 1 Sensor ground Engine Coolant Temperature Sensor (ECTS) 2 Throttle position sensor (TPS) #2 signal input Throttle position sensor (TPS) #2 [ETC Module] 3 Manifold absolute pressure sensor (MAPS) signal input Manifold absolute pressure sensor (MAPS) 4 A/C Pressure Transducer (APT) signal input A/C Pressure Transducer (APT) 5 - 6 - 7 Accelerator Position Sensor (APS) #1 signal input Accelerator Position Sensor (APS) #1 8 - 9 - 10 - 11 Electric Load signal input (Defrost) A/C Control Module, Outside Mirror 12 Brake switch 1 signal input Brake lamp swtich , Brake switch 13 Heated Oxygen Sensor [Bank 1 / Sensor 2] signal input Heated Oxygen Sensor [Bank 1 / Sensor 2] 14 Battery Sensor Temperature signal input Battery sensor 15 Intake air temperature sensor (IATS) signal input Intake Air temperature sensor (IATS) 16 Battery Sensor Current Direct signal input Battery sensor 17 - 18 Accelerator Position Sensor (APS) #2 signal input Accelerator Position Sensor (APS) #2 19 - 20 - 21 - 22 Throttle position sensor (TPS) #1 signal input Throttle position sensor (TPS) #1 23 Brake Lamp Switch signal input Brake Switch 24 Start switch signal input Ignition switch 25 Sensor ground Heated Oxygen Sensor [Bank 1 / Sensor 1] 26 - 27 Sensor ground Knock sensor (KS) 28 - 29 Wheel speed sensor [B] signal input Front wheel speed sensor (RH) [Without ABS] 30 Wheel speed sensor [A] signal input Front wheel speed sensor (RH) [Without ABS] 31 - 32 Sensor ground Camshaft Position Sensor (CMPS) [Bank 1 / Intake] Camshaft Position Sensor (CMPS) [Bank 1 / Exhaust] 33 Power Ground Chassis Ground 34 Clutch Switch signal input Clutch switch [M...

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