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.
2014 Jeep Wrangler Rubicon, Automatic TransFACTORY OEM SERVICE PROCEDURE
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.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.