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 MANUALSJEEP2014WRANGLER SPORT, AUTOMATIC TRANSREPAIR AND DIAGNOSISTRANSMISSIONTRANSMISSION CONTROL SYSTEMS(TRANSMISSION CONTROL MODULE (TCM) - ELECTRICAL DIAGNOSTICS)DTC TROUBLESHOOTINGU0114-LOST COMMUNICATION WITH FINAL DRIVE CONTROL MODULEDIAGNOSTIC TEST
2014 Jeep Wrangler Sport, Automatic Trans
Diagnostic Test
2014 Jeep Wrangler Sport, Automatic TransSECTION Diagnostic Test
VERIFY THE DTC IS ACTIVE
NOTE:
Make sure the IOD fuse is installed and battery Voltage is between 10 and 16 Volts before proceeding.
- Turn the ignition on.
- With the scan tool, read DTCs.
Is the DTC active at this time?
Yes
- Refer to DIAGNOSIS AND TESTING . Perform the diagnostic procedure for U0001-CAN C BUS first if it is present.
- Perform the NAG1 TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .
No
- Refer to 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.