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Home >> Jeep >> 2011 >> Compass Base, 2.0 A, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 73 ((Transmission Control Module (TCM) Electrical Diagnostics - CVT Automatic Transmission) - MK) >> DTC Troubleshooting >> U1146 - Lost Communication With External Memory >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2017 Jeep Patriot and 2017 Jeep Compass. However, it is still accessible from the selected car via links, so may be relevant.
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. Refer to  CVT TCM - PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE   .