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 MANUALSJAGUAR2016XJR BASEREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSDTC INDEXDIAGNOSTIC TROUBLE CODE (DTC) INDEX DTC: REAR DIFFERENTIAL CONTROL MODULE (RDCM) -- XJ/X351DIAGNOSTIC TROUBLE CODE (DTC) INDEX DTC: REAR DIFFERENTIAL CONTROL MODULE (RDCM)DESCRIPTION AND OPERATIONREAR DIFFERENTIAL CONTROL MODULE (RDCM)U1A14-49 CAN INITIALIZATION FAILURE - INTERNAL ELECTRONIC FAILUREACTION
2016 Jaguar XJR Base
U1A14-49 CAN Initialization Failure - Internal electronic failure: Action
2016 Jaguar XJR BaseSECTION Action
- Clear the DTC and retest. If the problem persists, configure the module using the manufacturer approved diagnostic system. Clear the DTC and retest
- If the problem persists, check and install a new rear differential control module as required
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.