Buick Regal: DTC B0987

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 Descriptors

DTC B0987 01

Vehicle Direction Camera Indicator Circuit Short to Battery

DTC B0987 06

Vehicle Direction Camera Indicator Circuit Low Voltage/Open

DTC B0987 0B

Vehicle Direction Camera Indicator Circuit High Current

Diagnostic Fault Information

1. Indicator malfunction

Circuit/System Description

The lane departure warning is enabled and disabled through the lane departure warning switch. When enabled, the frontview camera module will illuminate the indicator located in the switch. For the exact location of the lane departure warning switch, refer to the Owner's Manual.

The indicator and switch are connected to the frontview camera module and the system operates as a stand-alone feature.

Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

B0987 01

The frontview camera module detects a short to voltage in the control circuit.

B0987 06

The frontview camera module detects a short to ground or an open/high resistance in the control circuit.

B0987 0B

The frontview camera module detects a high current in the control circuit

Action Taken When the DTC Sets

• Lane departure warning is disabled
• The driver information center displays "Service Front Camera".

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

Reference Information

Schematic Reference

Driver Assistance Systems Wiring Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Lane Departure Warning 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 B356A is not set.

• If the DTC is set

Refer to DTC B356A

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

3. Verify the lane departure warning indicator turns ON and OFF while pressing and releasing the lane departure warning switch.

• If the indicator does not turn ON and OFF

Refer to Circuit/System Testing.

• Go to next step: If the indictor turns ON and OFF

4. All OK.

Circuit/System Testing

1. Ignition OFF, and all vehicle systems OFF, disconnect the harness connector at the S48E Multifunction Switch - Center Console, ignition ON.

NOTE: Verify interior lighting dimming is turned all the way up.

2. Test for 6.2 - 10.9 V between the dimming control circuit terminal 3 and ground.

• If less than 6.2 V

1. Ignition OFF, disconnect the harness connector at the K9 Body Control Module.
2. Test for infinite resistance between the control circuit and ground.
   • If less than infinite resistance, repair the short to ground on the circuit.
   • Go to next step: If infinite resistance
3. Test for less than 2 Ω in the control circuit end to end.
   • If 2 Ω or greater, repair the open/high resistance in the circuit.
   • If less than 2 Ω, refer to Interior Backlighting Malfunction.

• If greater than 10.9 V

1. Ignition OFF, disconnect the harness connector at the K9 Body Control Module, ignition ON.
2. Test for less than 1 V between the control circuit and ground.
   • If 1 V or greater, repair the short to voltage on the circuit.
   • If less than 1 V, refer to Interior Backlighting Malfunction.

• Go to next step: If between 6.2 - 10.9 V

3. Connect a test lamp between the control circuit terminal 17 and B+.

4. Verify the test lamp turns ON and OFF when commanding the Lane Departure Warning Indicator On and Off with a scan tool.

• If the test lamp is always OFF

1. Ignition OFF, disconnect the harness connector at the K109 Frontview Camera Module, ignition ON.
2. Test for less than 1 V between the control circuit and ground.
   • If 1 V or greater, repair the short to voltage on the circuit.
   • Go to next step: If less than 1 V
3. Ignition OFF.
4. Test for less than 2 Ω in the control circuit end to end.
   • If 2 Ω or greater, repair the open/high resistance in the circuit.
   • If less than 2 Ω, replace the K109 Frontview Camera Module.

• If the test lamp is always ON

1. Ignition OFF, disconnect the harness connector at the K109 Frontview Camera Module.
2. Test for infinite resistance between the control circuit and ground.
   • If less than infinite resistance, repair the short to ground on the circuit.
   • If infinite resistance, replace the K109 Frontview Camera Module.

• Go to next step: If the test lamp turns ON and OFF

5. Test or replace the S48E Multifunction Switch - Center Console.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair

• Floor Console Accessory Function Switch Replacement for S48E Multifunction Switch - Center Console replacement.
• Control Module References for control module replacement, programming, and setup.

DTC B1008

Diagnostic Instructions

• Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle
• Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
• An overview of each diagnostic category can be found here: Diagnostic Procedure Instruct

DTC Descriptor

DTC B1008

Calibration Data

Symptom Byte Information: Symptom Byte List.

Circuit/System Description

Ignition - On/Vehicle - In Service Mode - B174W Frontview Camera - Windshield - Calibration Data = Invalid

The B174W Frontview Camera Module performs a self-test to verify if a critical malfunction exists within the system. During the power-up mode, the Frontview Camera Module checks for a valid calibration data set.

Conditions for Running the DTC

Ignition - On/Vehicle - In Service Mode

Conditions for Setting the DTC

• B174W Frontview Camera - Windshield - Calibration Data = Invalid
• The frontview camera module has been replaced and programmed, but not calibrated.

Action Taken When the DTC Sets

• Lane Departure Warning = Disabled
• Forward Collision Alert = Disabled
• Driver Information Display - Service Front Camera/Service Lane Departure Warning
• B174W Frontview Camera - Windshield - All functions = Disabled

Conditions for Clearing the DTC

• A current DTC will clear when the diagnostic runs and passes.
• A history DTC will clear after 50 consecutive malfunction-free ignition cycles

Diagnostic Aids

• This DTC will be set as current while performing calibration, and will remain set as current until calibration can be completed
• The frontview camera will not calibrate if not properly installed or mounted.

Reference Information

Schematic Reference

Driver Assistance Systems Wiring Schematics

Connector End View Reference

Master Electrical Component List

Description and Operation

• Forward Collision Alert Description and Operation
• Lane Departure Warning 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

Circuit/System Verification

NOTE: This DTC can be set as a history DTC without affecting the operation of the component: B174W Frontview Camera - Windshield.

1. Ignition - On/Vehicle - In Service Mode.

2. Verify DTC B101E 42 is not set.

• If DTC B101E 42 is set

Perform the following procedure/test: K109 Frontview Camera Module: Programming and Setup

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

3. Verify DTC B1008 is not set.

• If DTC B1008 is set

1. Perform the following procedure/test: Front View Camera Module Learn.
2. Verify DTC B1008 is not set.
   • If the DTC sets - Replace the component: B174W Frontview Camera - Windshield
   • Go to next step: If the DTC is not set
3. All OK.

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

4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification.

For control module replacement, programming, and setup refer to: Control Module References.

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