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 MANUALSJEEP2009COMPASS LIMITED, EDG, AUTOMATIC CVTREPAIR AND DIAGNOSISTRANSMISSIONAUTOMATIC TRANS(TRANSMISSION CONTROL MODULE (TCM) - ELECTRICAL DIAGNOSTICS)DTC TROUBLESHOOTINGU1146-LOST COMMUNICATION WITH EXTERNAL MEMORYPOSSIBLE CAUSES
2009 Jeep Compass Limited, EDG, Automatic CVT
Possible Causes
2009 Jeep Compass Limited, EDG, Automatic CVTSECTION Possible Causes
| Possible Causes |
|---|
| (T327) DATA IN/OUT SELECT CIRCUIT SHORT TO VOLTAGE |
| (T313) CHIP SELECT CIRCUIT SHORT TO VOLTAGE |
| (T302) CLOCK SELECT CIRCUIT SHORT TO VOLTAGE |
| (T327) DATA IN/OUT SELECT CIRCUIT OPEN |
| (T313) CHIP SELECT CIRCUIT OPEN |
| (T302) CLOCK SELECT CIRCUIT OPEN |
| (T302) CLOCK SELECT CIRCUIT SHORT TO GROUND |
| (T313) CHIP SELECT CIRCUIT SHORT TO GROUND |
| (T327) DATA IN/OUT SELECT CIRCUIT SHORT TO GROUND |
| INTERNAL TRANSMISSION |
| TRANSMISSION CONTROL MODULE |
Always perform the CVT Pre-Diagnostic Troubleshooting procedure before proceeding. See DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard 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.