Hyundai Palisade: Engine Control System / ETC (Electronic Throttle Control) System

Hyundai Palisade (LX2) 2020-2024 Service Manual / Engine Control/Fuel System / Engine Control System / ETC (Electronic Throttle Control) System

Description and operation
Description
The Electronic Throttle Control (ETC) System consists of a throttle body with an integrated control motor and throttle position sensor (TPS). Unlike the existing mechanical throttle system that controls the throttle valve by using wire cable connected to the accelerator pedal, the ETC system controls the opening and closing of the throttle valve by the ECM with ETC motor according to the APS (Accelerator Position Sensor) signal mounted to electronic accelerator pedal module. The TPS signal is used to provide feedback regarding throttle position to the ECM. Also, the ETC system has the benefit of implementing cruise control function without additional external cruise control modules/cables.

Hyundai Palisade. Description and operation

Hyundai Palisade. Description and operation

1. Dry bearing
2. DC motor
3. Non-contact hall sensor
4. Gear
5. Magnet
6. Hall IC
7. Yoke
8. Stator

Specifications
Specification
[Throttle Position Sensor (TPS)]
Throttle angle (°)
Output Voltage (V) [Vref = 5V]
TPS1
TPS2
0
0.5
4.5
10
0.96
4.05
20
1.41
3.59
30
1.87
3.14
40
2.32
2.68
50
2.78
2.23
60
3.23
1.77
70
3.69
1.32
80
4.14
0.86
90
4.60
0.41
98
4.65
0.35
C.T (0)
0.5
4.5
W.O.T (86)
4.41
0.59

Hyundai Palisade. Specifications

[ETC Motor]
Item
Specification
Coil Resistance (Ω)
0.3 -100 [20°C (68°F)]

Troubleshooting
Fail-Safe Mode
Item
Fail-Safe
ETC Motor
Throttle valve stuck at 7°
TPS
TPS 1 fault
ECM looks at TPS2
TPS 2 fault
ECM looks at TPS1
TPS 1, 2 fault
Throttle valve stuck at 7°
APS
APS 1 fault
ECM looks at APS 2
APS 2 fault
ECM looks at APS 1
APS 1, 2 fault
Engine idle state

Hyundai Palisade. Troubleshooting   
When throttle value is stuck at 7°, engine speed will be limited to below 1,500 rpm and vehicle speed to maximum of 40 - 50 km/h (25 - 31 mph).
Schematic diagrams
Schematic Diagram

Hyundai Palisade. Schematic diagrams

Circuit Diagram

Hyundai Palisade. Schematic diagrams

Harness Connector

Hyundai Palisade. Schematic diagrams

Repair procedures
Inspection
If idle rpm is unstable or engine stops, check the ETC module operation with diagnostic tool diagnostic tool.
And if necessary, clean carbon in the throttle body.
1.
Connect the diagnostic tool to the Data Link Connector (DLC).
2.
Select "Vehicle S/W management" → "Inspection / Test" → "ETC Performance Test" on the diagnostic tool menu.
3.
Perform "ETC module test" procedure in accordance with the message.

Hyundai Palisade. Repair procedures

4.
If the test result of the ETC module or TPS signal shows NG, perform ETC module cleaning.

Hyundai Palisade. Repair procedures

Removal
1.
Switch "OFF" the ignition and disconnect the negative (-) battery terminal.
2.
Remove the air cleaner assembly.
(Refer to Engine Mechanical System - "Air Cleaner")
3.
Remove the engine hanger (A) after loosening the mounting bolt.

Hyundai Palisade. Repair procedures

4.
Disconnect the ETC Module connector (A).
5.
Disconnect the coolant hoses (B).
6.
Remove the ETC module (D) after loosening the mounting bolts (C).
Electronic throttle body mounting bolt :
14.7 - 24.5 N.m (1.5 - 2.5 kgf.m, 10.8 - 18.1 lb-ft)

Hyundai Palisade. Repair procedures

Cleaning
1.
Remove the ETC Module.
(Refer to Engine Control System - "ETC System")
2.
Keep the ETC module plate (A) open.

Hyundai Palisade. Repair procedures

3.
lean the pollutant in the throttle body with a soft cloth moistened with cleaning fluid.

Hyundai Palisade. Repair procedures

Hyundai Palisade. Repair procedures   
Do not spray cleaning fluid directly onto ETC. Use a lint free cloth moistened with cleaning fluid.
Be careful not to clean the coating fluid around the shaft. If coating fluid is removed, idling control failure might occur by foreign substance inflow or excessive air leakage.
4.
After cleaning, re-install the ETC module and then perform the ETC module learning procedure.
(Refer to Engine Control System - "ETC System" - Adjustment)
Installation
Hyundai Palisade. Repair procedures   
Install the component to the specified torque.
Note that internal damage may occur if the component is dropped. In this case, inspect the component before installation.
Hyundai Palisade. Repair procedures   
When cleaning the throttle body, clean the valve and carbon at the bore with a cloth wet with the cleaner.
Hyundai Palisade. Repair procedures   
Do not spray the engine cleaner on the throttle body.
Hyundai Palisade. Repair procedures   
Be careful as finger or cloth may get caught in the valve.
When installing the throttle body, keep foreign materials away from entering the throttle body.
1.
Install in the reverse order of removal.
Adjustment
ETC module learning procedure
Be sure to perform the ETC module learning procedure when replacing or re-installing the ETC module.
1.
Wait for 1 minute with the ignition switch ON.
2.
Start the engine and hold the idle status for 15 minutes.
3.
Waif for 1 minute with the ignition switch OFF.
4.
Restart the engine, check that the idle speed is stable.
Hyundai Palisade. Repair procedures   
Failing to perform the ETC module learning procedure after replacement or reinstallation may lead to MIL illumination with DTCs.

    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...

    Intake Air Temperature Sensor (IATS)

    Description and operation Description Mounted inside the Manifold Absolute Pressure Sensor, Intake Air Temperature Sensor (IATS) detects the intake air temperature...

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    Hyundai Palisade. Operate?

    The SRS consists of the following components:

    1. Driver's front air bag module
    2. Passenger's front air bag module
    3. Side air bag modules
    4. Curtain air bag modules
    5. Retractor pre-tensioner
    6. Air bag warning light
    7. SRS control module (SRSCM)/ Rollover sensor
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    9. Side impact sensors
    10.Side pressure sensors
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