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• When Monitored: • With the ignition on • Battery voltage between 10 and 16 volts • IOD fuse installed • FCM is configured correctly • Set Condition: Possible Causes CAN B BUS CIRCUITS OPEN OR SHORTED DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES FCM NOT CONFIGURED CORRECTLY HEADLAMP LEVELING MODULE HEADLAMP LEVELING MODULE POWER AND GROUND MODULE THAT SET THIS DTC Diagnostic Test 1. VERIFY DTC IS ACTIVE NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding. Is this DTC active? Yes >> Go To 2 No >> Refer to the Stored Lost Communication test procedure. Refer to the table of contents in this section. Perform BODY VERIFICATION TEST – VER 1. (Refer to BODY VERIFICATION TEST – VER 1). 2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS With the scan tool, read active DTCs from all modules. NOTE: Check for FCM configuration, CAN B or C hardware electrical, VIN Missing/Mismatch, battery or igni- Does the scan tool display any active DTCs to the conditions listed above? Yes >> Diagnose and repair the DTC. Refer to the Table of Contents for a complete list of the symptoms. Perform BODY VERIFICATION TEST – VER 1. (Refer to BODY VERIFICATION TEST – VER 1). No >> Go To 3 3. VERIFY THAT THE HIDT IS ACTIVE ON THE BUS Turn the ignition on. With the scan tool, select ECU View. Verify that the HIDT is active on the bus. Is the HIDT active on the bus? Yes >> Go To 4 No >> Refer to the Table of Contents located in this section for a no response test procedure. Perform BODY VERIFICATION TEST – VER 1. (Refer to BODY VERIFICATION TEST – VER 1). 8E - 70 ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS LX |