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.
Stop/Start System: ECM
FUNCTIONS WITHIN THE SYSTEM
ECM controls the engine system based on signals from the various control modules and sensors.
INDIVIDUAL FUNCTION WITHIN THE SYSTEM
- The ECM consists of the microcomputer and input/output connectors for signal and power supply.
- When the ignition switch is turned OFF, power is supplied continuously from the battery for maintaining the DTC and memory functions.
- The ECM includes a self-diagnosis function for simplifying trouble diagnosis.
- For supporting DIG (Direct Injection Gasoline), the ECM includes a high-voltage injector driver.
- The ECM contains an atmospheric pressure sensor.
INDIVIDUAL OPERATION
The ECM controls a variety of engine systems. Refer to System Description .
Component Location
The ECM is installed on the underside of the vehicle front side of the left front fender protector.
NO RELATED
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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.