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.
Push Button Ignition Switch: Notes
The push button ignition switch is used to control the ignition mode.
There are 2 circuits the BCM monitors from the ignition switch to change the ignition mode. One circuit is monitored for voltage and the other for a ground signal. When the START/STOP button is pressed, one circuit routes battery voltage to the BCM while a voltage signal from the BCM on the second circuit is routed to ground, indicating a request to change the ignition mode. Changing the ignition mode out of OFF works in conjunction with the PATS. The BCM must recognize a valid programmed key before it changes the ignition mode out of OFF. Refer to: Passive Anti-Theft System (PATS) - System Operation and Component Description .
Refer to the following table for information about achieving the various ignition modes.
| Ignition Entry Condition | Desired Ignition Mode | Action To Take |
|---|---|---|
| Off | ON (engine off) | Press the START/STOP button without applying the brake pedal. |
| Off or on | START | Apply the brake pedal and then press the START/STOP button. |
| On (engine off) | OFF | Press the START/STOP button. |
| On (engine running) | OFF | Press and hold the START/STOP button. |
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.