Hyundai Creta: Engine Control System / ETC (Electronic Throttle control) System
Description and operation
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.
Schematic diagrams
Specifications
| [Throttle Position Sensor
(TPS)] |
[TPS 1]
Item
|
Opening Percentage (%)
|
Output Voltage(V) [Vref = 5V]
|
C.T
|
5.1 ~ 8.1
|
0.17 ~ 0.27
|
W.O.T
|
56.4 ~ 64.4
|
1.86 ~ 2.13
|
[TPS 2]
Item
|
Opening Percentage (%)
|
Output Voltage (V) [Vref = 5V]
|
C.T
|
59.7 ~ 60.9
|
1.97 ~ 2.01
|
W.O.T
|
0.6 ~ 7.6
|
0.02 ~ 0.25
|
| • |
Reference Voltage = 5V (Sensor output Max. Voltage = 3.3V)
|
|
[ETC Motor]
Item
|
Sensor Resistance
|
Coil Resistance (Ω)
|
0.3 ~ 100 [20°C (68°F)]
|
Troubleshooting
Schematic diagrams
(M/T)
(A/T)
Troubleshooting
Items
|
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
|
APS 1 fault
|
Replace it with APS2
|
APS 2 fault
|
Replace it with APS1
|
APS 1,2 fault
|
Throttle valve stuck at 5°
|
| • |
When throttle value is stuck at 5°, engine speed is limited
at below 1,500 rpm and vehicle speed at maximum 40 ~ 50 km/h
(25 ~ 31 mph)
|
|
Repair procedures
Throttle Position Sensor (TPS)
| 1. |
Connect a GDS on the Data Link Connector (DLC).
|
| 2. |
Start engine and check output voltages of TPS 1 and 2 at C.T and W.O.T.
|
Specification : Refer to Specification Section.
|
|
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.
|
| 4. |
Check that the resistance is within the specification.
|
Specification : Refer to Specification Section.
|
|
ETC System Initialization
When ignition switch is turned from OFF to ON, ETC system learns the throttle
angle in 1 sec.
| 1. |
Throttle valve moves from limp-home position to close position.
|
| 2. |
And then, it opens to about 15° and moves to limp-home position.
|
| 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 - "Air Cleaner")
|
| 3. |
Disconnect the ETC module connector.
|
| 4. |
Disconnect the coolant hoses (A).
|
| 5. |
Remove the installation bolts (B), and then remove the ETC module from
the engine.
|
| • |
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. |
Install in the reverse order of removal.
|
Electronic throttle control module Installation bolt :
9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)
|
|
Schematic diagrams
ECM Terminal And Input/Output
signal [M/T]
ECM Terminal Function
(M/T)
Connector [E100-MA]
Pin No.
Descriptio ...
Description and operation
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Engine Control Module (ECM)
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