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 MANUALSJEEP2009GRAND CHEROKEE LIMITED, 3.7 K, AWDREPAIR AND DIAGNOSISENGINE PERFORMANCEIGNITION SYSTEM(FRONT CONTROL MODULE (FCM) - ELECTRICAL DIAGNOSTICS)DTC TROUBLESHOOTINGU0252-LOST COMMUNICATION WITH TRAILER LIGHTING MODULEPOSSIBLE CAUSES
2009 Jeep Grand Cherokee Limited, 3.7 K, AWD
Possible Causes
2009 Jeep Grand Cherokee Limited, 3.7 K, AWDSECTION Possible Causes
| Possible Causes |
|---|
| CAN B BUS CIRCUITS OPEN |
| DTC'S RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES |
| FCM NOT CONFIGURED CORRECTLY |
| (A922) (A907) FUSED B(+) CIRCUIT OPEN OR SHORTED |
| (F941) FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN OR SHORTED |
| (Z923) GROUND CIRCUIT OPEN |
| TRAILER LIGHTING MODULE (TM) |
| 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.