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Home >> Jeep >> 2011 >> Liberty Sport, 4WD, Part Time >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> (Transmission Control Module (TCM) - Electrical Diagnostics) >> DTC Troubleshooting >> P1629-TCM Internal - Solenoid Supply/ Watchdog >> Possible Causes

Possible Causes

Possible Causes 
(T78) SOLENOID SUPPLY VOLTAGE CIRCUIT SHORT TO VOLTAGE
TRANSMISSION CONTROL MODULE

Always perform the NAG1 Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  Standard Procedure  . 

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