Buick Regal: DTC B390C

Diagnostic Instructions

• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC B390C

Long Range Radar Sensor Module

Circuit/System Description

After replacement, the radar sensor module - long range must complete an alignment procedure. The alignment procedure can be completed by driving the vehicle for approximately 30 min.

Conditions for Running the DTC

• Module alignment procedure started.
• Vehicle operating on the road.

Conditions for Setting the DTC

The radar sensor module - long range was unable to complete alignment process within approximately 30 min of drive time.

Action Taken When the DTC Sets

• The radar sensor module - long range is disabled.
• Any systems that rely on data from the radar sensor module - long range are disabled.
• A service message may be displayed on the driver information center.

Conditions for Clearing the DTC

The radar sensor module - long range is successfully aligned.

Diagnostic Aids

• The B233B Radar Sensor Module - Long Range must be securely mounted. Verify it is secured properly in it's mount.
• The harness, or other obstructions should not pass in front of the B233B Radar Sensor Module - Long Range

Reference Information

Schematic Reference

Driver Assistance Systems Wiring Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Active Safety System Description and Operation

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information.

Circuit/System Verification

1. Ignition ON.

2. Verify DTC B390C is not set

• If the DTC is set.

1. Perform the Radar Sensor Module - Long Range Learn procedure.
2. Verify DTC B390C is not set after the calibration procedure has been completed.
   • If the DTC is set after calibration, replace the B233B Radar Sensor Module - Long Range.
   • Go to next step: If the DTC is not set after calibration
3. All OK.

• Go to next step: If DTC B390C 66 is not set

3. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for radar sensor module - long range replacement, programming, and setup.

DTC B390D

Diagnostic Instructions

• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC B390D

Frontview Camera Module

Circuit/System Description

The frontview camera module has determined that it is not properly mounted.

Conditions for Running the DTC

Vehicle operating on the road.

Conditions for Setting the DTC

The frontview camera module is improperly mounted.

Action Taken When the DTC Sets

• All system that operate with input from the frontview camera module are disabled.
• A service message may be displayed on the driver information center.

Conditions for Clearing the DTC

The frontview camera module is successfully aligned.

Diagnostic Aids

• The frontview camera module must be securely mounted. Verify it is secured properly in it's bracket.
• The frontview camera module must have a clear field of vision to the road ahead. Check for anything that may impair the frontview camera module's ability to clear see the area in front of the vehicle.

Reference Information

Schematic Reference

Driver Assistance Systems Wiring Schematics

Connector End View Reference

Master Electrical Component List

Description and Operation

Active Safety System Description and Operation

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information.

Circuit/System Verification

1. Ignition ON.

2. Verify there are no DTCs set, except for DTC B390D.

• If any other DTCs are set

Refer to Diagnostic Trouble Code (DTC) List - Vehicle.

• Go to next step: If no other DTCs are set

NOTE: Before performing the calibration, verify that the B174W Frontview Camera - Windshield will not have difficulty seeing lane markings in front of the vehicle. If the view of the B174W Frontview Camera - Windshield is blocked with mud, dirt, snow, ice, or slush, if the windshield is damaged, or if weather limits visibility, such as while driving in fog, rain, or snow conditions, the calibration procedure may not be able to be completed.

3. Calibrate the B174W Frontview Camera - Windshield. Refer to Front View Camera Module Learn.

4. Verify DTC B390D is not set

• If DTC B390D is set

Replace the B174W Frontview Camera - Windshield.

• Go to next step: If DTC B390D is not set

5. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for control module replacement, programming, and setup.

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