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.
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HOMESERVICE MANUALSJEEP2009COMMANDER LIMITED, 4.7 P, 4WDREPAIR AND DIAGNOSISTRANSMISSIONTRANSFER CASE(FINAL DRIVE CONTROL MODULE (FDCM) - ELECTRICAL DIAGNOSTICS)STANDARD PROCEDURETRANSFER CASE VERIFICATION TESTDIAGNOSTIC TEST
2009 Jeep Commander Limited, 4.7 P, 4WD
Diagnostic Test
2009 Jeep Commander Limited, 4.7 P, 4WDSECTION Diagnostic Test
- TRANSFER CASE VERIFICATION TEST
- Disconnect all jumper wires and reconnect all previously disconnected components and connectors.
- With the scan tool, select Clear Stored DTCs.
- Make sure that all accessories are turned off and that the battery is fully charged.
- Test drive the vehicle in each Transfer Case range and verify proper operation in each range.NOTE: To select or deselect 4LO (if equipped), vehicle speed must be below 3 M.P.H. (5 KM/H) with the ignition ON and the transmission in neutral (auto trans).
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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.