Buick Regal: DTC B094D or B094E
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 B094D
Left Side Object Detection Indicator Circuit
DTC B094E
Right Side Object Detection Indicator Circuit
For symptom byte information, refer to Symptom Byte List.
Diagnostic Fault Information
Circuit/System Description
The side blind zone alert system sensors are located behind the rear fascia
and detect and report objects
on either side of the vehicle, within a specified blind zone. The system alerts
with a visual indicator
placed on each side rear view mirror, to the presence of objects that may not be
visible in the inside
rearview mirror and outside rearview mirrors. When the system detects a vehicle
in the side blind zone
while driving forward, independent if passing a vehicle or being passed, an
amber warning symbol will
light up in the appropriate outside mirror. This indicates that it may be unsafe
to change lanes. If the
driver then activates the turn signal, the amber warning symbol starts flashing
and a chime sounds to
give an extra warning not to change lanes. The side object sensor module
provides the voltage to the
outside rearview mirror to illuminate the side blind zone alert symbol on the
mirror.
Side blind zone alert is active from speeds of 10 km/h (6.2 MPH) up to 140
km/h (87 MPH). Driving
faster deactivates the system, indicated by low lighting warning symbols in the
mirrors. Driving under
this speed again will turn off the warning symbols. If then a vehicle is
detected in blind zone, the
warning symbols will illuminate normally on the appropriate side. When the
vehicle is started, both
outside mirror displays will briefly come on to indicate that the system is
operating.
Conditions for Running the DTC
- Engine running.
- The Side blind zone alert is active from speeds of 10 km/h (6.2 MPH) up
to 140 km/h (87 MPH).
Conditions for Setting the DTC
B094D 02
The module has detected a short to ground in the left side object detection
indicator circuit.
B094D 01
The module has detected a short to voltage in the left side object detection
indicator circuit.
B094E 02
The module has detected a short to ground in the right side object detection
indicator circuit.
B094E 01
The module has detected a short to voltage in the right side object detection
indicator circuit.
Action Taken When the DTC Sets
The side blind zone alert system is inoperative and Service Side Detection
System is displayed on the
Driver Information Center.
Conditions for Clearing the DTC
The condition for setting the DTC is no longer present.
Diagnostic Aids
- Review the system description and operation in order to familiarize
yourself with the system
functions. For an overview of the component/system, refer to: Side Blind
Zone Alert
Description and Operation.
- The side blind zone system can be disabled if any off the following
occur:
- Disabled by Driver Personalization
- There is a loss of serial data communication with a sensor or
between modules.
- The side blind zone may be temporarily unavailable due to the following:
- A blockage condition exists (i.e. mud/snow buildup in front of the
sensor). A driver
information message "Side Detection System Unavailable" will be
displayed. The side blind
zone system transitions back to the normal operating state when the
blockage is removed.
Bumper sticks, fascia damage, labels, and heavy rain storms may also
cause this condition.
- The blockage determination is performed with the vehicle in a drive
gear.
The side blind zone alert system will read the GPS latitude and
longitude on the serial data
bus and calculate if the vehicle is within a Radio Astronomy zone. These
zones are located
in Europe and Japan and require the sensors to be turned off. The "Side
Detection System
Unavailable" message will be displayed to the driver when this occurs.
- Because the sensors are identical, they may be swapped from one side of
the vehicle to the other
in an attempt to isolate a concern. Sensors should NOT be swapped from one
vehicle to another.
- The side blind zone system is designed to ignore stationary objects;
however, the system may
occasionally detect guard rails, signs, trees, shrubs, or other stationary
objects as an object in the
blind zone. This is normal system operation and does not require service.
- The side blind zone system may indicate an object in the blind zone if a
trailer is attached to the
vehicle, or a bicycle or object is extending out to either side of the
vehicle. This is normal
operation and does not require service.
- Lane Change Alert (LCA) can be disabled in vehicle personalized
settings, this will also disable
the Side Blind Zone Alert (SBZA) system. When disabled, the bulb check of
the mirror indicators
will also be disabled. A driver information center message will be displayed
at start up when the
LCA system is disabled. This feature must be enabled prior to trying to
diagnose the system.
Reference Information
Schematic Reference
Driver Assistance Systems Wiring Schematics
Connector End View Reference
COMPONENT CONNECTOR END VIEWS - INDEX
Description and Operation
Side Blind Zone Alert 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.
Special Tools
EL-35616-210 Test Light - Probe Kit
Circuit/System Verification
1. Ignition OFF, ignition ON.
2. Verify the side blind zone alert system indicators located in the outside
rearview mirrors briefly
turn ON and then OFF during the system self test when ignition is turned ON.
- If the side blind zone alert system indicators do not briefly turn ON
and OFF
Refer to Circuit/System Testing
- Go to next step: If both side blind zone alert indicators briefly
turn ON and OFF
3. All OK.
Circuit/System Testing
NOTE: Make sure to use a high impedance test lamp like special tool EL-
35616-210.
1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector
for the appropriate
A9 Outside Rearview Mirror. It may take up to 2 min for all vehicle systems to
power down.
- X510 - Driver Door Harness to Outside Rearview Mirror
- X610 - Passenger Door Harness to Outside Rearview Mirror
2. Test for less than 10 Ω between the ground circuit terminal 5 and ground.
- Ignition OFF.
- Test for less than 2 Ω in the ground circuit end to end.
- If 2 Ω or greater, repair the open/high resistance in the circuit.
- If less than 2 Ω, repair the open/high resistance in the ground
connection.
3. Ignition ON, connect a test lamp between the control circuit terminal 5
and the ground circuit
terminal 15.
4. Verify the test lamp turns ON and OFF when commanding the Object Detection
Alert Indicators
On and Off with a scan tool.
- If the test lamp is always OFF
- Ignition OFF, disconnect the harness connector at the appropriate B218
Side Object Sensor
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, replace the B218 Side Object Sensor Module.
- If the test lamp is always ON
- Ignition OFF, disconnect the harness connector at the appropriate B218
Side Object Sensor
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, replace the B218 Side Object Sensor Module.
- Go to next step: If the test lamp turns ON and OFF
5. Test or replace the A9 Outside Rearview Mirror Glass.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
- Outside Rearview Mirror Glass Replacement
- Control Module References for control module replacement, programming
and setup
READ NEXT:
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 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
SEE MORE:
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.
Refer to Diagnostic Procedure Instructions provide an overview of each
diagnostic category.
DTC Descr
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
D