Kia Optima: 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
1.
Shut off the High Voltage circuit.
(Refer to “High Voltage Shut-off Procedures”)
2.
Turn the ignition switch OFF and disconnect the auxiliary 12V negative (-) battery terminal ...
ETC (Electronic Throttle Control) System Troubleshooting
Fail-Safe Mode
ItemFail-SafeETC MotorThrottle valve stuck at 5°TPSTPS 1 faultReplace it with TPS 2TPS 2 faultReplace it with TPS 1TPS 1,2 faultThrottle valve stuck at 5°APSAPS 1 faultReplace it ...
See also:
Inspection
1.
With the washer motor connected
to the reservoir tank, fill the reservoir tank with water.
Befo ...
Troubleshooting
Troubleshooting
Symptom
Probable cause
Remedy
Play in steering
Loose yoke plug
Retighten
Loose steering gear ...
Fuel Tank Pressure Sensor (FTPS). Schematic Diagrams
Circuit Diagram
...
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