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.
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.
- Ignition OFF, disconnect the harness connector at the K9 Body Control
Module.
- 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
- 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.
- Ignition OFF, disconnect the harness connector at the K9 Body Control
Module, ignition
ON.
- 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
- Ignition OFF, disconnect the harness connector at the K109 Frontview
Camera Module,
ignition ON.
- 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
- Ignition OFF.
- 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
- Ignition OFF, disconnect the harness connector at the K109 Frontview
Camera Module.
- 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.
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.
- Perform the following procedure/test: Front View Camera Module Learn.
- 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
- 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.
READ NEXT:
Diagnostic Instructions
Perform the Diagnostic System Check prior to using this diagnostic
procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strate
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.
Diag
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.
Diag
SEE MORE:
Special Tools
EN-50656 Holding Tool
EN 50793 Locking Tool
For equivalent regional tools, refer to Special Tools.
Removal Procedure
NOTE: Ensure the engine is properly timed to Top Dead Center (TDC),
prior to
performing repairs.
1. Remove the camshaft cover. Refer to Camshaft Cover Replacement.
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
DT