Hyundai Palisade: Engine Control System / Description and operation

Hyundai Palisade (LX2) 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 including the 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 negative (-) battery 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 covered by the shielded ground wires to the body in order to prevent the influence of ignition noises and radio interference. If the shielded wire is faulty, the control harness must be replaced.

•	When checking the generator for the charging state, do not disconnect the positive (+) battery terminal to protect 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 out automatically after 3 sequential driving cycles without the same malfunction. Immediately after the ignition switch is turned on (ON position without starting), the MIL will illuminate continuously to indicate that the MIL operates normally.

Faults with the following items will illuminate the MIL.

•

Catalyst

•	Fuel system

•	Manifold Absolute Pressure Sensor (MAPS)

•	Intake Air Temperature Sensor (IATS)

•	Engine Coolant Temperature Sensor (ECTS)

•	Throttle Position Sensor (TPS) [integrated into ETC Module]

•	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)

•	ETC Motor [integrated into ETC Module]

•	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)

•	Manifold Absolute Pressure Sensor (MAPS)

•	Throttle Position Sensor (TPS) [integrated into ETC Module]

•	Engine coolant temperature sensor (ECTS)

•	ETC Motor [integrated into ETC Module]

•

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, leave the negative (-) battery terminal disconnected for 15 seconds or more until the diagnostic memory is erased.

Relationship between DTC and Driving Pattern in EOBD System

Hyundai Palisade. 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 out 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 be automatically erased 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 rises by at least 4°C (40°F) from engine starting and reaches a minimum temperature of 71°C (160°F).

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

Components and components location

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

Engine Control Module (ECM)

Schematic diagrams ECM Terminal and Input / Output Signal ECM Terminal Function Connector [A] Pin No Description Connected to 1 Ignition Coil (Cylinder #4) control output Ignition Coil (Cylinder #4) 2 Injector (Cylinder #3) [High] control output Injector (Cylinder #3) 3 Injector (Cylinder #5) [High] control output Injector (Cylinder #5) 4 Injector (Cylinder #1) [High] control output Injector (Cylinder #1) 5 Camshaft Position Sensor (CMPS) [Bank 2 / Exhaust] signal input Camshaft Position Sensor (CMPS) [Bank 2 / Exhaust] 6 Camshaft Position Sensor (CMPS) [Bank 2 / Intake] signal input Camshaft Position Sensor (CMPS) [Bank 2 / Intake] 7 Throttle Position Sensor (TPS) 2 signal input Throttle Position Sensor (TPS) 2 8 - 　 9 Rail Pressure Sensor (RPS) signal input Rail Pressure Sensor (RPS) 10 CVVT Oil Temperature Sensor (OTS) signal input CVVT Oil Temperature Sensor (OTS) 11 - 　 12 - 　 13 Sensor power (+5V) CVVT Oil Temperature Sensor (OTS) Manifold Absolute Pressure Sensor (MAPS) 14 - 　 15 - 　 16 - 　 17 - 　 18 - 　 19 ETC Motor [-] control output ETC Motor 20 Heated Oxygen Sensor (HO2S) [Bank 1 / Sensor 1] Heater control output Heated Oxygen Sensor (HO2S) [Bank 1 / Sensor 1] 21 Heated Oxygen Sensor (HO2S) [Bank 2 / Sensor 1] Heater control output Heated Oxygen Sensor (HO2S) [Bank 2 / Sensor 1] 22 Ignition Coil (Cylinder #5) control output Ignition Coil (Cylinder #5 23 Injector (Cylinder #6) [High] control output Injector (Cylinder #6) 24 Injector (Cylinder #2) [High] control output Injector (Cylinder #2) 25 Injector (Cylinder #4) [High] control output Injector (Cylinder #4) 26 Camshaft Position Sensor (CMPS) [Bank 1 / Exhaust] signal input Camshaft Position Sensor (CMPS) [Bank 1 / Exhaust] 27 Camshaft Position Sensor (CMPS) [Bank 1 / Intake] signal input Camshaft Position Sensor (CMPS) [Bank 1 / Intake] 28 Intake Air Temperature Sensor (IATS) signal input Intake Air Temperature Sensor (IATS) 29 Manifold Absolute Pressure Sensor (MAPS) signal input Manifold Absolute Pressure Sensor (MAPS) 30 - 　 31 - 　 32 - 　 33 - 　 34 Sensor power (+5V) Camshaft Position Sensor (CMPS) [Bank 1 / Exhaust] Camshaft Position Sensor (CMPS) [Bank 2 / Intake] 35 - 　 36 Sensor power (+5V) Camshaft Position Sensor (CMPS) [Bank 1 / Intake] Camshaft Position Sensor (CMPS) [Bank 2 / Exhaust] 37 - 　 38 Purge Control Solenoid Valve (PCSV) control output Purge Control Solenoid Valve (PCSV) 39 - 　 40 ETC Motor [+] control output ETC Motor 41 - 　 42 - 　 43 Ignition Coil (Cylinder #1) control output Ignition Coil (Cylinder #1) 44 Injector (Cylinder #6) [Low] control output Injector (Cylinder #6) 45 Injector (Cylinder #3) [Low] control output Injector (Cylinder #3) 46 Injector (Cylinder #2) [Low] control output Injector (Cylinder #2) 47 Sensor ground Camshaft Position Sensor (CMPS) [Bank 1 / Exhaust] Camshaft Position Sensor (CMPS) [Bank 2 / Intake] 48 Sensor ground Manifold Absolute Pressure Sensor (MAPS) Oil Pressure Sensor (OPS) 49 Sensor ground Camshaft Position Sensor (CMPS) [Bank 1 / Intake] Camshaft Position Sensor (CMPS) [Bank 2 / Exhaust] 50 - 　 51 - 　 52 - 　 53 - 　 54 Engine Coolant Temperature Sensor (ECTS) signal input Engine Coolant Temperature Sensor (ECTS) 55 Sensor Shield Crankshaft Position Sensor (CKPS) Knock Sensor (KS) #1 [Bank 1] Knock Sensor (KS) #2 [Bank 2] 56 Sensor power (+5V) Rail Pressure Sensor (RPS) 57 - 　 58 Sensor ground Engine Coolant Temperature Sensor (ECTS) Rail Pressure Sensor (RPS) 59 Sensor ground Throttle Position Sensor (TPS) 1 Throttle Position Sensor (TPS) 2 60 Variable Intake Solenoid (VIS) Valve 1 control output Variable Intake Solenoid (VIS) Valve 1 61 Variable Intake Solenoid (VIS) Valve 2 control output Variable Intake Solenoid (VIS) Valve 2 62 - 　 63 - 　 64 Ignition Coil (Cylinder #2) control output Ignition Coil (Cylinder #2) 65 Injector (Cylinder #1) [Low] control output Injector (Cylinder #1) 66 Injector (Cylinder #4) [Low] control output Injector (Cylinder #4) 67 Injector (Cylinder #5) [Low] control output Injector (Cylinder #5) 68 Crankshaft Position Sensor (CKPS) [High] signal input Crankshaft Position Sensor (CKPS) 69 Crankshaft Position Sensor (CKPS) [Low] signal input Crankshaft Position Sensor (CKPS) 70 - 　 71 - 　 72 Oil pressure switch signal input Oil Pressure Sensor (OPS) 73 - 　 74 - 　 75 Throttle Position Sensor (TPS) 1 signal input Throttle Position Sensor (TPS) 1 76 Knock Sensor (KS) [Bank 1] [Low] signal input Knock Sensor (KS) [Bank 1] 77 Knock Sensor (KS) [Bank 2] [Low] signal input Knock Sensor (KS) [Bank 2] 78 Sensor ground Heated Oxygen Sensor (HO2S) [Bank 2 / Sensor 2] 79 Rc/Rp (Pump Cell Voltage) Heated Oxygen Sensor (HO2S) [Bank 2 / Sensor 1] 80 VS+ (NERNST Cell Voltage) Heated Oxygen Sensor (HO2S) [Bank 2 / Sensor 1] 81 Heated Oxygen Sensor (HO2S) [Bank 2 / Sensor 2] signal input Heated Oxygen Sensor (HO2S) [Bank 2 / Sensor 2] 82 VS+ (NERNST Cell Voltage) Heated Oxygen Sensor (HO2S) [Bank 1 / Sensor 1] 83 Rc (Compensative Resistance) Heated Oxygen Sensor (HO2S) [Bank 1 / Sensor 1] 84 Oil Pressure Solenoid Valve control output Oil Pressure Solenoid Valve 85 Ignition Coil (Cylinder #6) control output Ignition Coil (Cylinder #6) 86 Ignition Coil (Cylinder #3) control output Ignition Coil (Cylinder #3) 87 Fuel Pressure Control Valve (FPCV) [High] control output Fuel Pressure Control Valve (FPCV) 88 Fuel Pressure Control Valve (FPCV) [Low] control output Fuel Pressure Control Valve (FPCV) 89 Heated Oxygen Sensor (HO2S) [Bank 2 / Sensor 2] Heater control output Heated Oxygen Sensor (HO2S) [Bank 2 / Sensor 2] 90 Heated Oxygen Sensor (HO2S) [Bank 1 / Sensor 2] Heater control output Heated Oxygen Sensor (HO2S) [Bank 1 / Sensor 2] 91 CVVT Oil Control Valve (OCV) [Bank 2 / Exhaust] control output CVVT Oil Control Valve (OCV) [Bank 2 / Exhaust] 92 CVVT Oil Control Valve (OCV) [Bank 1 / Exhaust] control output CVVT Oil Control Valve (OCV) [Bank 1 / Exhaust] 93 Variable Force Solenoid (VFS) [Bank 2 / Intake] control output Variable Force Solenoid (VFS) [Bank 2 / Intake] 94 Variable Force Solenoid (VFS) [Bank 1 / Intake] control output Variable Force Solenoid (VFS) [Bank 1 / Intake] 95 - 　 96 Sensor power (+5V) Throttle Position Sensor (TPS) 1 Throttle Position Sensor (TPS) 2 97 Knock Sensor (KS) [Bank 1] [High] signal input Knock Sensor (KS) [Bank 1] 98 Knock Sensor (KS) [Bank 2] [High] signal input Knock Sensor (KS) [Bank 2] 99 Sensor ground Heated Oxygen Sensor (HO2S) [Bank 1 / Sensor 2] 100 - 　 101 Rc (Compensative Resistance) Heated Oxygen Sensor (HO2S) [Bank 2 / Sensor 1] 102 VS-/IP- (Common ground) Heated Oxygen Sensor (HO2S) [Bank 2 / Sensor 1] 103 Heated Oxygen Sensor (HO2S) [Bank 1 / Sensor 2] signal input Heated Oxygen Sensor (HO2S) [Bank 1 / Sensor 2] 104 VS-/IP- (Common ground) Heated Oxygen Sensor (HO2S) [Bank 1 / Sensor 1] 105 Rc/Rp (Pump Cell Voltage) Heated Oxygen Sensor (HO2S) [Bank 1 / Sensor 1] Connector [K] Pin No Description Connected to 1 ECM ground Chassis ground 2 ECM ground Chassis ground 3 Battery power (B+) Main Relay 4 ECM ground Chassis ground 5 Battery power (B+) Main Relay 6 Battery power (B+) Main Relay 7 - 　 8 - 　 9 - 　 10 - 　 11 - 　 12 - 　 13 Sensor ground A/C Pressure Transducer (APT) 14 Immobilizer communication line Immobilizer Control Module 15 Fuel Level Sender (FLS) signal input [Fuel pump] Fuel Level Sender (FLS) 16 - 　 17 - 　 18 - 　 19 - 　 20 Sensor power (+5V) Accelerator Position Sensor (APS) 1 21 Main Relay control output Main Relay 22 - 　 23 - 　 24 - 　 25 - 　 26 - 　 27 - 　 28 Accelerator Position Sensor (APS) 2 signal input Accelerator Position Sensor (APS) 2 29 - 　 30 - 　 31 - 　 32 Fuel Level Sender (FLS) signal input [Sub Fuel Sender] Sub Fuel Level Sender 33 Fuel Pump Relay control output Fuel Pump Relay 34 - 　 35 Sensor power (+5V) A/C Pressure Transducer (APT) 36 Sensor power (+5V) Accelerator Position Sensor (APS) 2 37 - 　 38 Vehicle speed signal input VDC control module 39 - 　 40 - 　 41 Start signal input Start Relay 42 - 　 43 - 　 44 - 　 45 - 　 46 - 　 47 Sensor ground Accelerator Position Sensor (APS) 2 48 - 　 49 Brake Switch [Test] signal input Brake Switch 50 - 　 51 - 　 52 Sensor ground Accelerator Position Sensor (APS) 1 53 - 　 54 - 　 55 - 　 56 - 　 57 - 　 58 - 　 59 - 　 60 P-CAN [Low] Other control module, Data Link Connector (DLC), Multi-Purpose Check Connector 61 - 　 62 - 　 63 - 　 64 A/C Pressure Transducer (APT) signal input A/C Pressure Transducer (APT) 65 - 　 66 - 　 67 - 　 68 - 　 69 LIN (Local Interconnect Network) Serial Bus Line Battery Sensor 70 - 　 71 Cooling Fan Relay control output Cooling Fan Relay 72 Engine speed signal output Integrated Body Control Unit (IBU) 73 - 　 74 - 　 75 - 　 76 - 　 77 P-CAN [High] Other control module, Data Link Connector (DLC), Multi-Purpose Check Connector 78 - 　 79 Start Relay control output Start Relay 80 - 　 81 - 　 82 Accelerator Position Sensor (APS) 1 signal input Accelerator Position Sensor (APS) 1 83 Brake Switch [Light] signal input Brake Switch 84 - 　 85 - 　 86 - 　 87 - 　 88 - 　 89 - 　 90 - 　 91 - 　 ECM Terminal Input/ Output signal Connector [A] Pin No Description Condition Type Level 1 Ignition Coil (Cylinder #4) control output Idle Pulse Vpeak = 400V Frequency : 0 - 58...

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