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.
PASSLOCK(tm) MODULE (THEFT DETERRENT CONTROL MODULE)
Passlock(tm) module contains the logic of theft deterrent system. Passlock(tm) module provides battery positive voltage to operate Passlock(tm) sensor. Passlock(tm) Module also measures voltage of security sensor signal circuit. Voltage measured will indicate whether Passlock(tm) sensor has been activated and whether resistance value from the sensor is a valid value or the tamper value. If voltage measured is in the valid range, Passlock(tm) module compares this voltage (voltage code) to a previously learned voltage code. If voltage codes match, Passlock(tm) module sends a class 2 message containing a password to PCM. If voltage codes do not match, or voltage is in tamper range, or there is a circuit fault, the Passlock(tm) module will not send the correct password to PCM, and vehicle will not start.
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.