Kia Forte BD Quiz
Engine Control System/Fuel System

ETC (Electronic Throttle Control) System

In this manual: Engine Control System/Fuel System
General Information — 8Maintenance — 32Engine Mechanical System — 47Engine Electrical System — 17Emission Control System — 10Engine Control System/Fuel System — 32Clutch System — 11Manual Transmission — 11DCT (Dual Clutch Transmission) System — 16Drive Shaft and Axle — 8Suspension System — 26Steering — 9Restraints — 11Brake System — 27Body (Interior and Exterior) — 119Body Electrical System — 98Heating, Ventilation, and Air Conditioning — 27
17steps
~102min
4/5difficulty
0102030405011.89N·mlb·ft
Tightening torque found on this page
Done 0 of 17

Specifications

Specification

Throttle Angle (°) Output voltage (V)
TP1 TP2
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 4.6 0,41
98 4,65 0,35
THA (0) 0,5 4,5
THW (86) 4.41 0,59

[ETC Motor]

Item Specification
Coil Resistance (Ω) 1,38 [20 °C]

Description and Operation

Description

The Electronic Throttle Control (ETC) system consists of a throttle body with a built-in control motor and a Throttle Position Sensor (TPS). Instead of a conventional throttle cable, the Accelerator Position Sensor (APS) is used to receive driver input. The ECM uses the APS signal to calculate the target throttle angle; the throttle position is then regulated by the ECM through ETC motor control. The TPS signal is used to send throttle position information to the ECM. Using ETC, precise throttle position control is possible; the need for external cruise control modules/cables is eliminated.

1. Dry Bearing
2. DC Motor
3. Non-contact Hall Sensor
4. Gear		 5. Magnet
6. Hall IC
7. Clamp
8. Stator

Schematic Diagram

Circuit Diagrams

Wiring Diagram

Harness Connector

Repair Procedures

Inspection

Throttle Position Sensor (TPS)

  1. Connect the KDS to the Data Link Connector (DLC).

  2. Start the engine and measure the output voltage of TPS 1 and 2 at TP and VOT.

    [TPS1]

    Item Opening Percentage (%) Output Voltage (V) [Vref = 5 V]
    THA 7 - 13 0,35 - 0,65
    THW 88,6 - 94 4,43 - 4,70

    [TPS2]

    Item Opening Percentage (%) Output Voltage (V) [Vref = 5 V]
    THA 87 - 93 4,35 - 4,65
    THW 6 - 11,4 0,3 - 0,57

ETC Motor

  1. Turn the ignition off.

  2. Disconnect the ETC module connector.

  3. Measure the resistance between terminals 1 and 2 of the ETC module.

  4. Make sure the resistance is within specification.

    Specification: 1.38 Ω [20 °C]

Removal and Installation

  1. Turn the ignition switch OFF and disconnect the negative (-) battery terminal.

  2. Remove the air cleaner.

    (Refer to Engine Mechanical System - "Air Cleaner")

  3. Remove the intercooler outlet hose.

  4. Disconnect the ETC module connector (A) and the vapor hose (B).

  5. Disconnect the coolant hoses (C).

  6. Remove the ETC module mounting bolts (D).

    ETC module mounting bolt:

    9,8–11.8 N·m

  7. Install in the reverse order of removal.

Adjustment

ETC Module Learning Procedure

When replacing or reinstalling, be sure to perform the ETC module learning procedure.

  1. Wait 1 minute with the ignition switched ON.

  2. Start the engine and maintain idle speed for 15 minutes.

  3. Wait for 1 minute with the ignition switched off.

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

Troubleshooting

Fail-Safe Mode

Item Fail-safe
ETC Motor Throttle Stuck at 7°
TPS TPS 1 Fault ECM Reads TPS2
APS 2 Fault ECM Reads TPS1
TPS 1,2 Malfunction Throttle Stuck at 7°
APS APS 1 Malfunction ECM Reads APS 2
APS 2 Malfunction ECM Reads APS 1
APS 1,2 Malfunction Engine Idle Condition

Test yourself

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