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, RWDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESCAN COMMUNICATION SYSTEM - NON-DTC DIAGNOSTICSDIAGNOSIS AND TESTINGBOTH DIAGNOSTIC CAN C (+) AND DIAGNOSTIC CAN C (-) CIRCUITS OPENNOTES
2009 Jeep Commander Limited, 4.7 P, RWD
Both Diagnostic Can C (+) And Diagnostic Can C (-) Circuits Open: Notes
2009 Jeep Commander Limited, 4.7 P, RWDSECTION Notes
For complete wiring diagrams, refer to SYSTEM WIRING DIAGRAMS .
- When Monitored:
When the scan tool queries the FCM.
- Set Condition:
The scan tool has detected an open condition on both Diagnostic CAN C circuits.
| Possible Causes |
|---|
| (D72) DIAGNOSTIC CAN C (+) CIRCUIT OPEN |
| (D71) DIAGNOSTIC CAN C (-) CIRCUIT OPEN |
| FRONT CONTROL MODULE |
RENDER: 1.0x
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.