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.
Standard Procedure - Wireless Control Module (WCM) Verification
For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .
The Sentry Key remote Entry Module (SKREEM) is also known as the Wireless Control Module (WCM). Depending upon model and year of the vehicle being serviced it may be equipped with either a SKREEM or a WCM.
Perform the following after completion of a diagnostic repair:
When entering the PIN, care should be taken because the WCM will only allow 3 consecutive attempts to enter the correct PIN. If 3 consecutive incorrect PIN's are entered the WCM will Lock Out the scan tool. To exit Lock Mode, the ignition key must remain in the Run position for one hour. All accessories must be off. A battery charger connected to the battery during this time period is recommended.
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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.