Diagnostic Procedure

DTC B14F4:86 (VEHICLE CONTROL MODULE (US)) 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 .) Are any of the following DTCs displayed? DTC related to internal malfunction in body control module (BCM) DTC related to internal malfunction in vehicle control module (VCM) C0063:54 for vehicle control module (VCM)	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 SAS CONTROL MODULE AND BODY CONTROL MODULE (BCM) REPLACEMENT RECORD Verify if the SAS control module or the body control module (BCM) has been replaced before performing this troubleshooting procedure. Has the SAS control module or the body control module (BCM) been replaced?	Yes	After implementing the required servicing according to procedure when replacing a module, perform the repair completion verification. (See SAS CONTROL MODULE REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM - US/CANADA SPEC.] .)
2		No	Go to the next step.
3	INSPECT PARKING ASSIST UNIT (ULTRASONIC) FOR MALFUNCTION Perform the DTC inspection for the parking assist unit (ultrasonic). (See DTC INSPECTION .) Is a DTC displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PARKING ASSIST UNIT (ULTRASONIC) (US)] .)
3		No	Go to the next step.
4	VERIFY DSC HU/Control Module DTCs Perform the DTC inspection for the DSC HU/Control Module. (See DTC INSPECTION .) Is a DTC displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [DSC HU/Control Module (US)] .)
4		No	Go to the next step.
5	VERIFY STEERING ANGLE SENSOR RELATED DTCs Perform the DTC inspection for the body control module (BCM). (See DTC INSPECTION .) Is a steering angle sensor related DTC displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [BODY CONTROL MODULE (BCM) (US)] .)
5		No	Go to the next step.
6	VERIFY ALL SYSTEM DTCs Perform the CMDTC self-test. (See DTC INSPECTION .) Are any DTCs other than this DTC displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
6		No	Go to the next step.
7	PERFORM YAW RATE INITIAL SETTING FOR VEHICLE CONTROL MODULE (VCM) Perform the yaw rate initial setting for the vehicle control module (VCM) using the M-MDS. (See VCM INITIAL SETTING .) Switch the ignition OFF. 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.
7		No	Go to repair completion verification 2.
8	INSPECT PARKING ASSIST UNIT (ULTRASONIC) 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 .) 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, replace the parking assist unit (ultrasonic) and perform the repair completion verification. (See PARKING ASSIST UNIT (ULTRASONIC) REMOVAL/INSTALLATION .)
8		No	Perform the [ACTION FOR NON-REPEATABLE MALFUNCTIONS]. (See TROUBLESHOOTING PROCEDURE [(US)] .) If DTC is displayed Repeat the diagnosis from Step 1. If DTC is not displayed 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 .)
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.