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 MANUALSJEEP2013WRANGLER SPORT, AUTOMATIC TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 256 ((TRANSMISSION CONTROL MODULE (TCM) - ELECTRICAL DIAGNOSTICS))STANDARD PROCEDURENAG1 TRANSMISSION VERIFICATION TESTNOTES
2013 Jeep Wrangler Sport, Automatic Trans
Nag1 Transmission Verification Test: Notes
2013 Jeep Wrangler Sport, Automatic TransSECTION Notes
WARNING: This page is about a different car, the 2016 Jeep Wrangler and 2015 Jeep Wrangler. However, it is still accessible from the selected car via links, so may be relevant.
To validate that the repair(s) fixed the vehicle, perform the following steps.
- Reconnect any disconnected components.
- Connect the scan tool to the Data Link Connector.
- With the scan tool, erase ABS DTCs.
- With the scan tool, erase PCM DTCs.
- With the scan tool, erase TCM DTCs.CAUTION:
Apply the parking brake.
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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.