Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
ETS (Electronic Throttle System): Description
ETS (Electronic Throttle System) consists of: Input signals from Accelerator Position Sensor (APS), Throttle Position Sensor (TPS), Ignition Switch and Serial Communication Line, an ETS Motor and a Limp-Home Valve to control the idle speed, throttle valve and TCS by using only one motor.
In ECU and ETS the signals from Accelerator Position Sensor (APS) and Throttle Position Sensor (TPS) are the most important. They have two circuits in sensor module, one is flowed to ECU and the other is flowed to ETS. ECU calculates the throttle target value with the signals from APS #2 (MAIN) and TPS #2 (SUB) and the ETS control module controls the ETS motor with the signals from APS #1 (SUB) and TPS #1 (MAIN).
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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