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.
2002 Jeep Liberty Limited, 4WD, Part TimeFACTORY OEM SERVICE PROCEDURE
Body Control Module: Messaging
The BCM uses the following messages received from other electronic modules over the PCI data bus:
- Battery temperature (PCM)
- Compass mini-trip computer button status (CMTC) (premium only)
- Coolant temperature (PCM)
- Distance pulses (PCM)
- Engine speed (PCM)
- Fuel tank level (PCM)
- Fuel used (PCM)
- Intrusion Transceiver Module (ITM) commands (premium in markets where required only)
- Manifold absolute pressure (PCM)
- OK to lock (rolling locks PCM)
- SKIS status (SKIM)
- Vehicle identification number (PCM)
- Vehicle speed (PCM)
Factory Service Tools
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.