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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 >> B1684-87-Left Headlamp Leveling Motor Control-Missing Message >> Possible Causes

Possible Causes

Possible Causes
LIN BUS CIRCUIT SHORTED TO VOLTAGE OR GROUND
LIN BUS CIRCUIT OPEN OR HIGH RESISTANCE
AUTO HEADLAMP LEVELING MODULE (AHLM)

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