Kia Stinger: Engine Control System / ETC (Electronic Throttle Control) System

Kia Stinger CK 2018-2021 Service Manual / Engine Control / Fuel System / Engine Control System / ETC (Electronic Throttle Control) System

Specifications
Specification

[Throttle Position Sensor (TPS)]

Throttle Angle(°)
Output Voltage(V) [Ref=5V]
TPS1
TPS2
0
0.0
5.0
10
0.48
4.52
20
0.95
4.05
30
1.43
3.57
40
1.90
3.10
50
2.38
2.62
60
2.86
2.14
70
3.33
1.67
80
3.81
1.19
90
4.29
0.71
100
4.76
0.24
105
5.0
0
C.T (6 - 15°)
0.29 - 0.71
4.29 - 4.71
W.O.T (93 - 102°)
4.43 - 4.86
0.14 - 0.57

[ETC Motor]

Item
Specification
Coil Resistance (Ω)
1.1 - 1.7 [20°C(68°F)]

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.

Schematic Diagram

Schematic diagrams
Circuit Diagram

Harness Connector

Repair procedures
Inspection

Throttle Position Sensor (TPS)

1.

Connect the KDS on the Data Link Connector (DLC).

2.

Start the engine and measure the output voltage of TPS 1 and 2 at C.T. and W.O.T.

Throttle Angle(°)
Output Voltage (V) [Vref = 5V]
TPS1
TPS2
0
0.0
5.0
10
0.48
4.52
20
0.95
4.05
30
1.43
3.57
40
1.90
3.10
50
2.38
2.62
60
2.86
2.14
70
3.33
1.67
80
3.81
1.19
90
4.29
0.71
100
4.76
0.24
105
5.0
0
C.T (6 - 15°)
0.29 - 0.71
4.29 - 4.71
W.O.T (93 - 102°)
4.43 - 4.86
0.14 - 0.57

ETC Motor

1.

Switch "OFF" the ignition.

2.

Disconnect the ETC module connector.

3.

Measure resistance between the ETC module terminals 3 and 6.

4.

Check that the resistance is within the specification.

Specification: 0.3 - 100 [20°C(68°F)]

Removal
1.

Switch "OFF" the ignition and disconnect the negative (-) battery terminal.

2.

Remove the alternator assembly.

(Refer to Engine Electrical System - "Alternator")

3.

Remove the intercooler outlet hose & pipe.

(Refer to Engine Mechanical System - "Intercooler")

4.

Disconnect the ETC module connector (A).

5.

Disconnect the coolant hose (B).

6.

Remove the ETC module from the engine after loosening the installation bolt (C).

Electronic throttle body Installation bolt :

9.8 - 11.8 N·m (1.0 - 1.2 kgf·m, 7.2 - 8.7 lb·ft)

Cleaning
1.

Remove the ETC Module.

(Refer to Engine Control System - "ETC System")

2.

Keep the ETC module plate (A) open.

3.

Clean the pollutant in the throttle body with a soft cloth moistened by cleaning fluid.

  

Do not spray cleaning fluid directly onto ETC module. Use a lint free cloth moistened by cleaning fluid.

Be careful not to clean the coating fluid around the shaft. If coating fluid is removed, idling control failure may occur due to inflow of foreign substance or excessive air leakage.

4.

After cleaning, reinstall the ETC module and then perform the ETC module learning procedure.

(Refer to Engine Control System - "ETC System" - Adjustment)

Installation
  

Install the component to the specified torques.

Note that internal damage may occur when the component is dropped. If the component has been dropped, inspect before installing.

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 reinstalling 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.

Wait for 1 minute with the ignition switch OFF.

4.

Restart the engine, and check that the idle speed is stable.

  

If the ETC module learning procedure is not performed after replacing or reinstalling it, MIL illumination with DTCs may occur.

Troubleshooting
Fail-Safe Mode

Item
Fail-Safe
ETC Motor
Throttle valve stuck at 5°
TPS
TPS 1 fault
ECM looks at TPS2
TPS 2 fault
ECM looks at TPS1
TPS 1, 2 fault
Throttle valve stuck at 5°
APS
APS 1 fault
ECM looks at APS 2
APS 2 fault
ECM looks at APS 1
APS 1, 2 fault
Throttle valve stuck at 5°

  

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).

Engine Control Module (ECM)
Schematic diagrams ECM Terminal And Input/Output signal ECM Terminal Function Connector [A] Terminal Description Connected to ...

Manifold Absolute Pressure Sensor (MAPS)
Specifications Specification Item Specification Output Voltage (V) 5 Pressure (KPa) 32.5 - 284 ...

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