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Home >> Chrysler >> 2021 >> Voyager LXi, Gas >> Repair and Diagnosis >> Accessories & Equipment >> Headlights >> (Automatic Headlamp Leveling Module (AHLM) - Electrical Diagnostics) >> DTC Troubleshooting >> B21DD-84-System Voltage - Signal Below Allowable Range >> Possible Causes

Possible Causes

Possible Causes
CHARGING OR VOLTAGE DTCS PRESENT
LOW BATTERY VOLTAGE
FUSED IGNITION CIRCUIT OPEN OR EXCESSIVE RESISTANCE
GROUND CIRCUIT OPEN OR EXCESSIVE RESISTANCE
AUTO HEADLAMP LEVELING MODULE (AHLM)

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