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Home >> Chrysler >> 2021 >> Voyager LX, Gas >> Repair and Diagnosis >> General Information >> OEM General Information >> (Global Telematics Box Module - Electrical Diagnostics) >> DTC Troubleshooting >> B21DD-84 - System Voltage-Signal Below Allowable Range >> Possible Causes

Possible Causes

Possible Causes
CHARGING SYSTEM
GLOBAL TELEMATICS BOX MODULE (TBM2)

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  .