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 MANUALSJEEP2009PATRIOT LIMITED, EDG, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 4 ((ALL WHEEL DRIVE (AWD) MODULE - ELECTRICAL DIAGNOSTICS))DTC TROUBLESHOOTINGU0001-CAN C BUSDIAGNOSTIC TEST
2009 Jeep Patriot Limited, EDG, Standard
Diagnostic Test
2009 Jeep Patriot Limited, EDG, StandardSECTION Diagnostic Test
WARNING: This page is about a different variant/trim than selected.
- ACTIVE DTC NOTE: For vehicle communication problems, use the scan tool to refer to the Network Review Screen. The screen depicts a high level view of the vehicle network. Fault and problem areas appear in red. Selecting any of the network components allows access to the source of the problem.
- Turn the ignition on.
- With a scan tool, read DTCs.
Is the status Active for this DTC?
Yes
- Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Diagnosis and Testing and perform the U0001-Can C Bus circuit diagnostic procedure.
No
- Refer to Non-DTC Diagnostics/Communication - Diagnosis and Testing and perform the Stored Lost Communication DTCs diagnostic procedure.
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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.