Diagnostic Procedure

DTC U2300:55 (VEHICLE CONTROL MODULE) DIAGNOSTIC PROCEDURE

Step	Inspection	Results	Action
1	INSPECT VEHICLE CONTROL MODULE (VCM) AND BODY CONTROL MODULE (BCM) FOR MALFUNCTION Perform the DTC inspection for the vehicle control module (VCM) and the body control module (BCM). (See DTC INSPECTION .) Is a DTC related to an internal malfunction displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [VEHICLE CONTROL MODULE (US)] .) (See DTC TABLE [BODY CONTROL MODULE (BCM) (US)] .)
1		No	Go to the next step.
2	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 performing the procedure required for the body control module (BCM) replacement again, perform the repair completion verification according to the [BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION]. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION [(US)] .)
2		No	Go to the next step.
3	VERIFY IF MALFUNCTION IS CAUSED BY BODY CONTROL MODULE (BCM) CONFIGURATION ERROR Switch the ignition OFF and wait for 30 s or more. Switch the ignition ON (engine 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 vehicle control module (VCM). (See DTC INSPECTION .) Is the same Pending DTC present?	Yes	Go to the next step.
3		No	Go to repair completion verification 2.
4	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 the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [BODY CONTROL MODULE (BCM) (US)] .)
4		No	Go to the next step.
5	RESET CONFIGURATION DATA FOR BODY CONTROL MODULE (BCM) Using the M-MDS, perform the body control module (BCM) configuration. (See CONFIGURATION .) Clear the DTC recorded in the memory. (See CLEARING DTC .) Perform the DTC inspection for the vehicle control module (VCM). (See DTC INSPECTION .) Is the same Pending DTC present?	Yes	Replace the body control module (BCM) and perform the repair completion verification. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION [(US)] .)
5		No	Go to repair completion verification 2.
Repair completion verification 1	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 vehicle control module (VCM). (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 CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(US)] .) 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. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION [(US)] .)
Repair completion verification 1		No	Go to the next step.
Repair completion verification 2	VERIFY IF OTHER DTC IS DISPLAYED Perform the DTC inspection. (See DTC INSPECTION .) Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
Repair completion verification 2		No	DTC troubleshooting completed.