Troubleshooting Diagnostic Procedure

B1A38-04: (CMU) TROUBLESHOOTING DIAGNOSTIC PROCEDURE

Step	Inspection	Results	Action
1	PURPOSE: VISUALLY INSPECT SD CARD Visually inspect the SD card for looseness or damage. Verify that there is no problem with the SD card using a PC. Is the SD card normal?	Yes	Go to the next step.
1		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
2	PURPOSE: INSPECT WIRING HARNESS (INCLUDING CONNECTOR/TERMINAL) BETWEEN USB PORT/SD CARD SLOT HUB/HDMI TERMINAL AND CONNECTIVITY MASTER UNIT (CMU) FOR MALFUNCTION Inspect the applicable circuit. (See CIRCUIT INSPECTION .) (See CONNECTOR INSPECTION .) Is the circuit normal?	Yes	Go to the next step.
2		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
3	PURPOSE: INSPECT USB PORT/SD CARD SLOT HUB/HDMI TERMINAL FOR MALFUNCTION DEPENDING ON REPEATABILITY Install/connect the part removed/disconnected during the troubleshooting procedure. Clear the DTC recorded in the memory. (See CLEARING DTC .) Replicate the vehicle conditions at the time the DTC was detected using the following procedure. Implement the repeatability verification procedure. (See REPEATABILITY VERIFICATION PROCEDURE .) Perform the DTC inspection for the connectivity master unit (CMU). (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, replace the USB port/SD card slot hub/HDMI terminal and perform the repair completion verification 1. (Refer to USB PORT/SD CARD SLOT HUB REMOVAL/INSTALLATION in service information.) (Refer to [USB PORT/SD CARD SLOT HUB/HDMI TERMINAL REMOVAL/INSTALLATION] in service information.)
3		No	Go to repair completion verification 2.
4	PURPOSE: VERIFY IF SD CARD IS VALID Perform the [Navigation System Inspection] of the diagnostic assist function and implement [MAP Areas]. (See DIAGNOSTIC ASSIST FUNCTION [CMU] .) Is the SD card normal?	Yes	Go to the next step.
4		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
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 .) Replicate the vehicle conditions at the time the DTC was detected using the following procedure. Implement the repeatability verification procedure. (See REPEATABILITY VERIFICATION PROCEDURE .) Perform the DTC inspection for the connectivity master unit (CMU). (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 connectivity master unit (CMU), then go to the next step. (Refer to CONNECTIVITY MASTER UNIT (CMU) REMOVAL/INSTALLATION in service information.)
Repair completion verification 1		No	Go to the next step.
Repair completion verification 2	PURPOSE: VERIFY IF OTHER DTCs ARE 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.