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Home >> Fiat >> 2018 >> 500 Lounge, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 49 ((Audio (Radio) - Electrical Diagnostics - 500 - Electric)) >> DTC Troubleshooting >> U1733-87-Lost Communication With CTM >> Possible Causes

Possible Causes

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Possible Causes
CAN BUS CIRCUITS OPEN OR SHORTED
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
CONVERGENCE TELEMATICS MODULE (CTM) POWER AND GROUND
BCM NOT CONFIGURED CORRECTLY
CONVERGENCE TELEMATICS MODULE (CTM)
MODULE THAT SET THIS DTC