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

Hyundai Santa Fe (TM) 2019-2023 Service and Repair 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). 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.

Troubleshooting

Fail-Safe Mode

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

•	When throttle value is stuck at 5°, engine speed is limited at below 1,500rpm and vehicle speed at maximum 40 - 50 km/h (25 - 31 mph).

Specifications

Specification

[Throttle Position Sensor (TPS)]

Throttle Angle (°)	Output Voltage (V)
Throttle Angle (°)	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

Item	Sensor Resistance (kΩ)
TPS1	0.875 - 1.625 [20°C (68°F)]
TPS2	0.875 - 1.625 [20°C (68°F)]

[ETC Motor]

Item	Specification
Coil Resistance (Ω)	1.2 - 1.8 [20°C (68°F)]

Schematic diagrams

Schematic Diagram

Circuit Diagram

Harness Connector

Repair procedures

Inspection

Throttle Position Sensor (TPS)

1.	Connect the diagnostic tool on the Data Link Connector (DLC).

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)
Throttle Angle	TPS 1	TPS 2
C.T	0.3 - 0.9	4.2 - 5.0
W.O.T	1.5 - 3.0	3.3 - 3.8

3.	Turn the ignition switch OFF and disconnect the scantool from the DLC.

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

Specification : Refer to "Specification"

ETC Motor

1.	Turn the ignition switch OFF.

2.	Disconnect the ETC module connector.

3.	Measure resistance between the ETC module terminals 3 and 6.

Check that the resistance is within the specification.

Specification : Refer to "Specification"

Removal

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

2.	Remove the resonator and the air intake hose. (Refer to Engine Mechanical System - "Intake Manifold")

3.	Disconnect the ETC module connector (A).

Remove the installation bolts (A), and then remove the ETC module from the engine.

Tightening Torque :

7.8 - 11.8 N.m (0.8 - 1.2 kgf.m, 5.8 - 8.7 lb-ft)

Installation

•	Install the component with the specified torques.

•	Note that internal damage may occur when the component is dropped. In this case, use it after inspecting.

1.	Installation is reverse of removal.

❮Engine Control Module (ECM). Repair procedures

Removal • If you replace the PCM, you must perform oil pressure characteristics back up & input (TCU Replacement).

Manifold Absolute Pressure Sensor (MAPS). Description and operation❯

Description Manifold Absolute Pressure Sensor (MAPS) is a speed-density type sensor and is installed on the surge tank. It senses absolute pressure of the surge tank and transfers the analog signal proportional to the pressure to the ECM.

Other information:

Hyundai Santa Fe (TM) 2019-2023 Service and Repair Manual: Keyless Entry And Burglar Alarm

Description and operation Description Burglar Alarm State [B/A State] B/A State Description DISARM 1) In "DISARM" state, no vehicle start inhibition.