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Diagnostic Procedure

DTC B14FB:00 (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)] .)
No Go to the next step.
2 INSPECT FRONT SIDE RADAR SENSOR (LH) FOR MALFUNCTION 
  • Perform the DTC inspection for the front side radar sensor (LH). (See DTC INSPECTION .)
  • Is a DTC displayed?
 Yes Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [FRONT SIDE RADAR SENSOR (US)] .)
No Go to the next step.
3 INSPECT FRONT SIDE RADAR SENSOR (RH) FOR MALFUNCTION 
  • Perform the DTC inspection for the front side radar sensor (RH). (See DTC INSPECTION .)
  • Is a DTC displayed?
 Yes Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [FRONT SIDE RADAR SENSOR (US)] .)
No Go to the next step.
4 VERIFY IF FRONT SIDE RADAR SENSOR FUNCTION IS STOPPED DUE TO TEMPORARY DECREASE IN INTERNAL TEMPERATURE 
  • Start the engine and move the vehicle to a warm place.
  • 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.
No Explain to the customer that the front side radar sensor function stopped due to a temporary decrease in the internal temperature of the front side radar sensor, and then go to repair completion verification 2.
5 DETERMINE IF MALFUNCTION CAUSE IS FRONT SIDE RADAR SENSOR ON EITHER LEFT OR RIGHT 
  • Install/connect the part removed/disconnected during the troubleshooting procedure.
  • Disconnect the front side radar sensor (RH) connector.
  • 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 front side radar sensor (LH), then go to the next step. (See FRONT SIDE RADAR SENSOR REMOVAL/INSTALLATION .)
No Replace the front side radar sensor (RH) and perform the repair completion verification.
(See FRONT SIDE RADAR SENSOR REMOVAL/INSTALLATION .)
6 INSPECT FRONT SIDE RADAR SENSOR (RH) 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 front side radar sensor (RH) and perform the repair completion verification.
(See FRONT SIDE RADAR SENSOR REMOVAL/INSTALLATION .)
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.
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.
No DTC troubleshooting completed.
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