Troubleshooting Diagnostic Procedure

U2300-56: (ALH/AFS/ALV) TROUBLESHOOTING DIAGNOSTIC PROCEDURE

Step	Inspection	Results	Action
1	PURPOSE: VERIFY IF THERE ARE DEFICIENCIES IN PREVIOUS MODULE REPLACEMENT PROCEDURE Verify the contents of the previous module replacement procedure. NOTE: If a module other than for this vehicle is installed, this diagnostic procedure cannot be used to resolve the problem. Is the correct module installed?	Yes	Go to the next step.
1		No	Install the correct module and perform repair completion verification 1.
2	PURPOSE: RECORD CONFIGURATION DATA Switch the ignition off/main power OFF. Switch the ignition ON (engine off or on)/main power ON (READY off or on) and wait for 1 min or more. Switch the ignition off/main power OFF and wait for 30 s or more. Switch the ignition ON (engine off or on)/main power ON (READY off or on). Clear the DTC recorded in the memory. (See CLEARING DTC .) Perform the DTC inspection for the auto leveling control module/adaptive front lighting system (AFS) control module/adaptive LED headlights control module. (See DTC INSPECTION .) Is the same Pending DTC present?	Yes	Go to the next step.
2		No	Perform the repair completion verification 2.
3	PURPOSE: VERIFY BODY CONTROL MODULE (BCM) DTC Perform the DTC inspection for the body control module (BCM). (See DTC INSPECTION .) Are any DTCs displayed?	Yes	Repair or replace the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [BCM] .)
3		No	Go to the next step.
4	PURPOSE: INSPECT BODY CONTROL MODULE (BCM) FOR MALFUNCTION Perform the quick check. (See DTC INSPECTION .) Are the following DTCs stored in other multiple modules? U2300-54: U2300-55: U2300-56: U2300-64:	Yes	Replace the body control module (BCM) and perform the repair completion verification 1. (Refer to BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION in service information.)
4		No	Go to the next step.
Repair completion verification 1	PURPOSE: VERIFY THAT VEHICLE IS REPAIRED Install/connect the part removed/disconnected during the troubleshooting procedure. Clear the DTC recorded in the memory. (See CLEARING DTC .) Perform the DTC inspection for the auto leveling control module/adaptive front lighting system (AFS) control module/adaptive LED headlights control module. (See DTC INSPECTION .) Is the same Pending DTC present?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See MALFUNCTION DIAGNOSIS FLOW [CONTROLLER AREA NETWORK (CAN)] .) If the CAN communication is normal, perform the diagnosis from Step 1. If the malfunction recurs, replace the auto leveling control module/adaptive front lighting system (AFS) control module/adaptive LED headlights control module, then go to the next step. (Refer to AUTO LEVELING CONTROL MODULE REMOVAL/INSTALLATION in service information.) (Refer to ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE INSPECTION in service information.) (Refer to [ADAPTIVE LED HEADLIGHTS CONTROL MODULE REMOVAL/INSTALLATION] in service information.)
Repair completion verification 1		No	Go to the next step.
Repair completion verification 2	PURPOSE: VERIFY IF OTHER DTCs DISPLAYED Perform the DTC inspection. (See DTC INSPECTION .) Are any other DTCs displayed?	Yes	Repair or replace the malfunctioning location according to the applicable DTC troubleshooting.
Repair completion verification 2		No	DTC troubleshooting completed.