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Home >> Jeep >> 2009 >> Commander Overland, 4WD >> Repair and Diagnosis (Single Page) >> Engine Performance >> Ignition System >> Front Control Module (FCM) - Electrical Diagnostics >> DTC Troubleshooting >> U0181-Lost Communication With Headlamp Leveling Translator (AHLM) >> Possible Causes
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Possible Causes

Possible Causes 
CAN B BUS CIRCUITS OPEN OR SHORTED
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
FCM NOT CONFIGURED CORRECTLY
AUTOMATIC HEADLAMP LEVELING MODULE (AHLM) POWER AND GROUND
AUTOMATIC HEADLAMP LEVELING MODULE (AHLM)
MODULE THAT SET THIS DTC
NOTE: The Automatic Headlamp Leveling Module (AHLM) is also known as the Headlamp Leveling Translator and is attached to and is part of the High Intensity Discharge Lamp assembly on the right side of the vehicle.