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.
Wake-Up & Sleep Functions
To decrease parasitic draw on battery when ignition switch is off, wake-up and sleep modes are used. In sleep mode, multiplex control unit stops communication and CPU control functions when system operation is not needed. When any monitored system or switch operates, such as a door being unlocked, the related multiplex control unit will change from sleep function to wake-up function. A wake-up signal is then sent to other multiplex control units. When ignition switch is turned off, there is a 30-second delay before sleep mode begins. Sleep mode will not begin if any door is open.
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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.