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.
Principles of Operation
The GEM receives inputs and delivers outputs to a majority of the electronically-controlled features of the vehicle. The GEM constantly monitors the systems under its control and reports a concern in the form of a diagnostic trouble code (DTC). The DTC can be retrieved with a diagnostic tool through the ISO 9141 communication network. The GEM controls the following features:
- front wiper and washer
- warning chime
- battery saver
- illuminated entry and interior lighting
- driver one-touch down power window (optional)
- battery saver relay
- door ajar warning indicator lamp
- safety belt warning indicator lamp
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.