Troubleshooting Diagnostic Procedure

U2301-64: (CMU) TROUBLESHOOTING DIAGNOSTIC PROCEDURE

Step	Inspection	Results	Action
1	PURPOSE: INSPECT BODY CONTROL MODULE (BCM) AND CONNECTIVITY MASTER UNIT (CMU) FOR MALFUNCTION Perform the DTC inspection for the body control module (BCM) and the connectivity master unit (CMU). (See DTC INSPECTION .) Is any one of the following DTCs displayed? Code related to body control module (BCM) communication error, internal malfunction Code related to internal malfunction of connectivity master unit (CMU)	Yes	Repair or replace the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [BCM] .) (See DTC TABLE [CMU] .)
1		No	Go to the next step.
2	PURPOSE: VERIFY BODY CONTROL MODULE (BCM) REPLACEMENT RECORD Verify if the body control module (BCM) has been replaced before performing this troubleshooting procedure. Has the body control module (BCM) been replaced?	Yes	After implementing the required servicing when replacing a module, perform the repair completion verification 1. (Refer to BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION in service information.)
2		No	Go to the next step.
3	PURPOSE: VERIFY IF MALFUNCTION IS CAUSED BY BODY CONTROL MODULE (BCM) CONFIGURATION ERROR 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) and wait for 30 s or more. Clear the DTC recorded in the memory. (See CLEARING DTC .) Perform the DTC inspection for the connectivity master unit (CMU). (See DTC INSPECTION .) Is the same Pending DTC present?	Yes	Go to the next step.
3		No	Go to repair completion verification 2.
4	PURPOSE: VERIFY BODY CONTROL MODULE (BCM) CONFIGURATION RELATED DTCs Clear the DTC recorded in the memory. (See CLEARING DTC .) Perform the DTC inspection for the body control module (BCM). (See DTC INSPECTION .) Is a configuration related DTC displayed?	Yes	Repair or replace the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [BCM] .)
4		No	Go to the next step.
5	PURPOSE: RESET CONFIGURATION DATA FOR BODY CONTROL MODULE (BCM) Perform the body control module (BCM) configuration using the M-MDS. (See CONFIGURATION.) Clear the DTC recorded in the memory. (See CLEARING DTC .) Perform the DTC inspection for the connectivity master unit (CMU). (See DTC INSPECTION .) Is the same Pending DTC present?	Yes	Replace the connectivity master unit (CMU) and perform the repair completion verification 1. (Refer to CONNECTIVITY MASTER UNIT (CMU) REMOVAL/INSTALLATION in service information.)
5		No	Go to repair completion verification 2.
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 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 body control module (BCM), then go to the next step. (Refer to BODY CONTROL MODULE (BCM) 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.