Hyundai Santa Cruz: Engine Control System / ETC (Electronic Throttle Control) System

- Description The Electronic Throttle Control (ETC) System consists of a throttle body with an integrated control motor and throttle position sensor (TPS).Instead of the traditional throttle cable, an Accelerator Position Sensor (APS) is used to receive driver input. The ECM uses the APS signal to calculate the target throttle angle; the position of the throttle is then adjusted via ECM control of the ETC motor. The TPS signal is used to provide feedback regarding throttle position to the ECM.Using ETC, precise control over throttle position is possible; the need for external cruise control modules/cables is eliminated.

- Specification ▷ Type : Hall IC non-connect sensor type

ETC Motor

Item	Specification
	New	Aged
Coil Resistance (Ω)	1.9 ± 10%	R < 2.8

- Fail-Safe Mode

Item	Fail-Safe
ETC Motor	Throttle valve stuck at 8.15°
TPS 1, 2	TPS 1 fault	Coping with TPS2 Signal Value
	TPS 2 fault	Coping with TPS1 Signal Value
	TPS 1, 2 fault	Throttle valve stuck at 8.15°
APS 1, 2	APS 1 fault	Coping with APS2 Signal Value
	APS 2 fault	Coping with APS1 Signal Value
	APS 1, 2 fault	Throttle valve stuck at 8.15°

※ When throttle value is stuck at 5°, engine speed will be limited to below 1,500 rpm and vehicle speed to maximum of 40 - 50 km/h (25 - 31 mph). - Schematic Diagram

- Circuit Diagram

Harness Connector

- Inspection [Throttle Position Sensor (TPS)]

1.Connect the diagnostic tool to 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.

Specification : Refer to "Inspection"

[ETC Motor]

1.Disconnect the ETC module and measure the resistance between the ETC module terminals 1 and 2.

Specification : Refer to "Inspection"

- Removal

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

2.Remove the air duct (A).(Refer to Engine Mechanical System - "Air Cleaner")

3.Remove the intercooler inlet hose and pipe.(Refer to Engine Mechanical System - "Intercooler")

4.Remove the intercooler outlet hose and pipe.(Refer to Engine Mechanical System - "Intercooler")

5.Disconnect the ETC module connecter (A).

6.Remove the mounting bolts (A) and then remove the ETC module from the enigne.

- Cleaning

1.Remove the ETC Module.(Refer to Engine Control System - "ETC Module")

2.Keep the ETC module plate (A) open.

3.Clean the contamination part of the throttle body with a soft and lint-free cloth dampened with cleanser to prevent foreign objects from going in.

   

• Do not spray a cleanser directly to ETC module. Use a soft and lint-free cloth to clean carbon.

• Be careful not to wipe out coating (A) around the shaft. If the coating is removed, poor idling control can be caused by excessive air leakage or foreign materials in the bearing of the shaft.

4.After cleaning it, reinstall the ETC module and perform ETC module learning procedure.(Refer to Engine Control System - "ETC Module")

- Installation

   

• Install the component to the specified torques.

• If a part is dropped, replace it with a new one and discard the dropped part as invisible damage may be caused.

1.Install the ETC module in the reverse order of removal.

- Adjustment ETC Module learning procedure When replacing new ETC module or reinstalling it, ETC module learning procedure must be performed.

1.Hold the start button or ignition key at the IG ON position for 1 minute.

2. After starting the engine, keep the idle state for 15 minutes.

3. Turn the ignition key or the start button off and hold for 1 minute.

4. Re-start the engine and check the idle roughness.

   

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