Hyundai Sonata: 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.
Schematic Diagram
Engine Control Module (ECM). Repair procedures
Removal
When replacing the ECM, the vehicle equipped with the immobilizer
must be performed procedure as below.
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ETC (Electronic Throttle Control) System. Troubleshooting
Fail-Safe Mode
Item
Fail-Safe
ETC Motor
Throttle valve stuck at 5°
TPS
TPS 1 fault
ECM looks at TPS2
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See also:
Light bulbs
WARNING - Working on the lights
Prior to working on the light, firmly apply the parking brake, ensure that
the ignition switch is turned to the LOCK position and turn off the lights to avoid
sudd ...
To turn cruise control off, do one of the following
Push the cruise ON/OFF button (the CRUISE indicator light in the instrument
cluster will go off).
Turn the ignition off.
Both of these actions cancel cruise control operation. If you wa ...
Positive Crankcase Ventilation (PCV) Valve. Description and Operation
Operation Principle
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