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Object Detection System and Pedestrian Protection System Buick Encore I

Collision/avoidance 14 illustrations ~17936 words

Scheme 1

Scheme 1: Lane Departure Warning (UFL)
Scheme 1: Lane Departure Warning (UFL)

Scheme 2

Scheme 2: Rearview Camera (UVC)
Scheme 2: Rearview Camera (UVC)

Scheme 3

Scheme 3: Front Sensors (UD5)
Scheme 3: Front Sensors (UD5)

Scheme 4

Scheme 4: Rear Sensors (UD5 or UD7)
Scheme 4: Rear Sensors (UD5 or UD7)

Scheme 5

Scheme 5: Side Object Detection (UFT)
Scheme 5: Side Object Detection (UFT)

Scheme 6

Scheme 6: Rearview Camera (UVC)
Scheme 6: Rearview Camera (UVC)

Scheme 7

Scheme 7: Rear Sensors (UD7)
Scheme 7: Rear Sensors (UD7)

Diagnostic Code Index

DTCDescription
DTC B094CDTC B094C Right Side Object Detection Control Module
DTC B0954, B0955, B0956, or B0957DTC B0954 Parking Assist Front Sensor Left Corner Circuit DTC B0955 Parking Assist Front Sensor Left Middle Circuit DTC B0956 Parking Assist Front Sensor Right Middle Circuit DTC B0957 Parking Assist Front Sensor Right Corner Circuit
DTC B0958, B0959, B0960, or B0961DTC B0958 Parking Assist Rear Sensor Left Corner Circuit DTC B0959 Parking Assist Rear Sensor Left Middle Circuit DTC B0960 Parking Assist Rear Sensor Right Middle Circuit DTC B0961 Parking Assist Rear Sensor Right Corner Circuit
DTC B0987DTC 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
DTC B1011DTC B1011 00 System Disabled Information Stored Malfunction
DTC B1015DTC B1015 00 Vehicle Identification Number Information Malfunction
DTC B101D (with side blind zone alert, UFT)DTC B101D Electronic Control Unit Hardware
DTC B1405 (Rear Park Assist - UD7)DTC B1405 02 Control Module Voltage Reference Output 2 Circuit Short to Ground DTC B1405 03 Control Module Voltage Reference Output 2 Circuit Low Voltage DTC B1405 07 Control Module Voltage Reference Output 2 Circuit High Voltage
DTC B1405 (Front and Rear Park Assist - UD5)DTC B1405 02 Control Module Voltage Reference Output 2 Circuit Short to Ground DTC B1405 03 Control Module Voltage Reference Output 2 Circuit Low Voltage DTC B1405 07 Control Module Voltage Reference Output 2 Circuit High Voltage
DTC B356ADTC B356A 02 Vehicle Direction Warning Switch Circuit Short to Ground DTC B356A 05 Vehicle Direction Warning Switch Circuit Short to Voltage

DIAGNOSTIC CODE INDEX

Diagnostic Instructions

  1. Perform the «Diagnostic System Check - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

DTC Descriptor

For symptom byte information, refer to Symptom Byte List .

Circuit/System Description

B218R Side Object Sensor Module - Right communicates on a private communication data bus with the B218L Side Object Sensor Module - Left. The B218L Side Object Sensor Module - Left is the master and can set this code if the B218R Side Object Sensor Module - Right determines it has an internal fault. DTC U18A6 will set if the left module is unable to communicate with the right side module.

Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

The B218R Side Object Sensor Module - Right has detected an internal malfunction.

Action Taken When the DTC Sets

  1. The side object sensor system is disabled..
  2. The DIC will display "Service Side Detection System".

Conditions for Clearing the DTC

  1. A current DTC clears when the malfunction is no longer present.
  2. A history DTC clears when the control module ignition cycle counter reaches the reset threshold of 40, without a repeat of the malfunction.

Diagnostic Aids

  1. The modules are not identical and cannot be swapped from side to side.
  2. This DTC may be stored as a history DTC without affecting the operation of the B218R Side Object Sensor Module - Right.
  3. Do not replace B218R Side Object Sensor Module - Right based only on DTC B094C being set in history.
  4. If DTC B094C is set as current, replace the B218R Side Object Sensor Module - Right.
  5. B218R Side Object Sensor Module - Right communicates on a private communication data bus with the B218L Side Object Sensor Module - Left. If programming is needed for module replacement, you must program B218L Side Object Sensor Module - Left which will then in turn program B218R Side Object Sensor Module - Right.

Reference Information

Schematic Reference

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

  1. Ignition ON.
  2. Verify that B094C is not set. If DTC is set Replace the B218R Side Object Sensor Module - Right. If the DTC is not set
  3. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for side object sensor module replacement, programming and setup.

  1. Perform the «Diagnostic System Check - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

DTC Descriptors

For symptom byte information, refer to Symptom Byte List .

Diagnostic Fault Information

CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
8 V ReferenceB1405 02B0954 06, B0955 06, B0956 06, B0957 06, B0958 06, B0959 06, B0960 06, B0961 06, B1405 03B0954 06, B0955 06, B0956 06, B0957 06, B0958 06, B0959 06, B0960 06, B0961 06, B1405 07
Left Front Object Sensor SignalB0954 06B0954 06B0954 01B0954 08, B0954 21
Left Middle Front Object Sensor SignalB0955 06B0955 06B0955 01B0955 08, B0955 21
Right Middle Front Object Sensor SignalB0956 06B0956 06B0956 01B0956 08, B0956 21
Right Front Object Sensor SignalB0957 06B0957 06B0957 01B0957 08, B0957 21
Low ReferenceB0954 01, B0955 01, B0956 01, B0957 01, B0958 01, B0959 01, B0960 01, B0961 01

The object sensors are 3-wire sensors that are used to determine the distance between the vehicle and an object of interest. The front and rear parking assist control module supplies 8 V to the object sensors via the 8 V reference circuit and provides ground via the low reference circuit. The front and rear parking assist control module triggers the sensors in a sequential loop. After each sensor transmits, the front and rear parking assist control module uses the sensor echo received through the signal circuit to calculate the distance and position of an object.

  1. Ignition ON
  2. The park assist is activated. The activation takes place through putting in the reverse gear or through operating the park assist switch.

B0954 01, B0955 01, B0956 01, or B0957 01

The front and rear parking assist control module has detected the voltage at the sensor circuit is greater than 11.5 V or the object sensor is not grounded.

B0954 06, B0955 06, B0956 06, or B0957 06

The front and rear parking assist control module has detected the voltage at the sensor circuit is less than 0.5 V.

B0954 08, B0955 08, B0956 08, or B0957 08

The front and rear parking assist control module has received an invalid signal.

B0954 21, B0955 21, B0956 21, or B0957 21

The object sensor determines no change in the position of an object while the vehicle is in motion.

B0954 3A, B0955 3A, B0956 3A, or B0957 3A

The front and rear parking assist control module determines the wrong sensor type is installed.

  1. The parking assist is disabled.
  2. The driver information center displays SERVICE PARK ASSIST.

The condition for setting the DTC is no longer present.

Schematic Reference

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify that DTC B1405 is not set. If the DTC is set Refer to «DTC B1405 (Rear Park Assist - UD7)»(/buick/encore/i-2012-2016/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system) , «DTC B1405 (Front and Rear Park Assist - UD5)»(/buick/encore/i-2012-2016/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system) If the DTC is not set
  3. Verify that DTC B0954 01, B0955 01, B0956 01, B0957 01 B0954 21, B0955 21, B0956 21 or B0957 21 is not set. If the DTC is set Verify the appropriate B78 Front Object Sensor is free of contamination from snow, mud, dirt, slush or ice. If contaminated, clean sensor. If there is no contamination Refer to Circuit/System Testing. If the DTC is not set
  4. Verify that DTC B0954 3A, B0955 3A, B0956 3A or B0957 3A is not set. If the DTC is set Replace the B78 Front Object Sensor with the correct sensor type. If the DTC is not set
  5. Ignition ON, transmission in REVERSE.
  6. Verify the scan tool Parking Assist System Status parameter displays Enabled. If the Parking Assist System displays Disabled Refer to Circuit/System Testing. If the Parking Assist System displays Enabled
  7. All OK.

Circuit/System Testing

  1. Ignition OFF, scan tool disconnected, disconnect the harness at the appropriate B78 Front Object Sensor. It may take up to 2 min for all vehicle systems to power down.
  2. Test for less than 10 ohms between the low reference circuit terminal 2 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector X3 at the K41 Front and Rear Parking Assist Control Module. Test for less than 2 ohms in the low reference circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms replace the K41 Front and Rear Parking Assist Control Module. If less than 10 ohms
  3. Ignition ON.
  4. Test for 7.5-9.5 V between the 8 V reference circuit terminal 1 and ground. If less than 7.5 V Ignition OFF, disconnect the harness connector at the K41 Front and Rear Parking Assist Control Module. Test for infinite resistance between the 8 V reference circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance Test for less than 2 ohms in the 8 V reference circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K41 Front and Rear Parking Assist Control Module. If greater than 9.5 V Ignition OFF, disconnect the harness connector at the K41 Front and Rear Parking Assist Control Module, ignition ON. Test for less than 1 V between the 8 V reference circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the K41 Front and Rear Parking Assist Control Module. If between 7.5-9.5 V
  5. Ignition OFF, remove the appropriate B78 Front Object Sensor and switch locations with another properly operating sensor. Connect harness connector at both sensors. Ignition ON.
  6. Verify the DTC is set for the new location in which the malfunctioning sensor is installed. If DTC set for the new location Replace the malfunctioning B78 Front Object Sensor. If DTC set for the original location Ignition OFF, disconnect the harness connector at the K41 Front and Rear Parking Assist Control Module, ignition ON. Test for less than 1 V between the signal circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Ignition OFF. Test for infinite resistance between the signal circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance Test for less than 2 ohms in the circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K41 Front and Rear Parking Assist Control Module. If no DTC set
  7. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Front Object Alarm Sensor Housing Replacement»(/buick/encore/i-2012-2016/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system__front-object-alarm-sensor-housing-replacement)
  2. «Rear Parking Assist Alarm Sensor Replacement»(/buick/encore/i-2012-2016/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system)
  3. «Control Module References»(/buick/encore/i-2012-2016/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for front and rear parking assist control module replacement, programming and setup.
  1. Perform the «Diagnostic System Check - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

For symptom byte information, refer to Symptom Byte List .

CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
8 V ReferenceB1405 02B0954 06, B0955 06, B0956 06, B0957 06, B0958 06, B0959 06, B0960 06, B0961 06, B1405 03B0954 06, B0955 06, B0956 06, B0957 06, B0958 06, B0959 06, B0960 06, B0961 06, B1405 07
Left Rear Object Sensor SignalB0958 06B0958 06B0958 01B0958 08, B0958 21
Left Middle Rear Object Sensor SignalB0959 06B0959 06B0959 01B0959 08, B0959 21
Right Middle Rear Object Sensor SignalB0960 06B0960 06B0960 01B0960 08, B0960 21
Right Rear Object Sensor SignalB0961 06B0961 06B0961 01B0961 08, B0961 21
Low ReferenceB0954 01, B0955 01, B0956 01, B0957 01, B0958 01, B0959 01, B0960 01, B0961 01

The object sensors are 3-wire sensors that are used to determine the distance between the vehicle and an object of interest. The front and rear parking assist control module supplies 8 V to the object sensors via the 8 V reference circuit and provides ground via the low reference circuit. The front and rear parking assist control module triggers the sensors in a sequential loop. After each sensor transmits, the front and rear parking assist control module uses the sensor echo received through the signal circuit to calculate the distance and position of an object.

  1. Ignition ON
  2. The parking assist is activated. The activation takes place through putting in the reverse gear or through operating the park assist switch.

B0958 01, B0959 01, B0960 01, or B0961 01

The front and rear parking assist control module has detected the voltage at the sensor circuit is greater than 11.5 V or the object sensor is not grounded.

B0958 06, B0959 06, B0960 06, or B0961 06

The front and rear parking assist control module has detected the voltage at the sensor circuit less than 0.5 V.

B0958 08, B0959 08, B0960 08, or B0961 08

The front and rear parking assist control module has received an invalid signal.

B0958 21, B0959 21, B0960 21, or B0961 21

The object sensor determines no change in the position of an object while the vehicle is in motion.

B0958 3A, B0959 3A, B0960 3A, or B0961 3A

The front and rear parking assist control module determines the wrong sensor type is installed.

  1. The parking assist is disabled.
  2. The driver information center displays SERVICE PARK ASSIST.

The condition for setting the DTC is no longer present.

Schematic Reference

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify that DTC B1405 is not set. If the DTC is set Refer to «DTC B1405 (Rear Park Assist - UD7)»(/buick/encore/i-2012-2016/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system) , «DTC B1405 (Front and Rear Park Assist - UD5)»(/buick/encore/i-2012-2016/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system) If the DTC is not set
  3. Verify that DTC B0958 01, B0959 01, B0960 01, B0961 01, B0958 21, B0959 21, B0960 21 or B0961 21 is not set. If the DTC is set Verify the B78 Rear Object Sensors are not contaminated with snow, mud, dirt, slush, or ice. If contaminated, clean sensor. If there is no contamination Refer to Circuit/System Testing. If the DTC is not set
  4. Verify that DTC B0958 3A, B0959 3A, B0960 3A or B0961 3A is not set. If the DTC is set Replace the B78 Rear Object Sensor with the correct sensor type. If the DTC is not set
  5. Ignition ON, transmission in REVERSE.
  6. Verify the scan tool Parking Assist System Status parameter displays Enabled. If the Parking Assist System displays Disabled Refer to Circuit/System Testing. If the Parking Assist System displays Enabled
  7. All OK.
  1. Ignition OFF, scan tool disconnected, disconnect the harness at the appropriate B78 Rear Object Sensor. It may take up to 2 min for all vehicle systems to power down.
  2. Test for less than 10 ohms between the low reference circuit terminal 2 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector X2 at the K41 Front and Rear Parking Assist Control Module. Test for less than 2 ohms in the low reference circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms replace the K41 Front and Rear Parking Assist Control Module. If less than 10 ohms
  3. Ignition ON.
  4. Test for 7.5-9.5 V between the 8 V reference circuit terminal 1 and ground. If less than 7.5 V Ignition OFF, disconnect the harness connector at the K41 Front and Rear Parking Assist Control Module. Test for infinite resistance between the 8 V reference circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance Test for less than 2 ohms in the 8 V reference circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K41 Front and Rear Parking Assist Control Module. If greater than 9.5 V Ignition OFF, disconnect the harness connector at the K41 Front and Rear Parking Assist Control Module, ignition ON. Test for less than 1 V between the 8 V reference circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the K41 Front and Rear Parking Assist Control Module. If between 7.5-9.5 V
  5. Ignition OFF, remove the appropriate B78 Rear Object Sensor and switch locations with another properly operating sensor. Connect harness connector at both sensors. Ignition ON.
  6. Verify the DTC is set for the new location in which the malfunctioning sensor is installed. If DTC set for the new location Replace the malfunctioning B78 Rear Object Sensor. If DTC set for the original location Ignition OFF, disconnect the harness connector at the K41 Front and Rear Parking Assist Control Module, ignition ON. Test for less than 1 V between the signal circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Ignition OFF. Test for infinite resistance between the signal circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance Test for less than 2 ohms in the circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K41 Front and Rear Parking Assist Control Module. If no DTC set
  7. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Rear Parking Assist Alarm Sensor Replacement»(/buick/encore/i-2012-2016/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system)
  2. «Control Module References»(/buick/encore/i-2012-2016/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for front and rear parking assist control module replacement, programming and setup.
  1. Perform the «Diagnostic System Check - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Lane Departure Warning Switch Indicator IgnitionB2625 02B0987 06
Lane Departure Warning Switch Indicator ControlB0987 06, B0987 0BB0987 01, B0987 0B

The lane departure warning is enabled and disabled through the lane departure warning switch located in the center console. When enabled, the frontview camera module will illuminate the indicator located in the switch.

The BCM supplies voltage to the indicator from the lighting dimming circuit. The frontview camera module turns on the indicator by proving the ground.

Ignition ON.

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 active safety control module detects high current in the control circuit.

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

The condition for setting the DTC is no longer present.

Schematic Reference

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify DTC B356A is not set. If the DTC is set Refer to «DTC B356A»(/buick/encore/i-2012-2016/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system) If the DTC is not set
  3. Verify the lane departure warning indicator turns ON and OFF when pressing and releasing the lane departure warning switch. If the indicator does not turn ON and OFF Refer to Circuit/System Testing. If the indictor turns ON and OFF
  4. All OK.
  1. Ignition OFF, and all vehicle systems OFF, disconnect the harness connector at the S48E Multifunction Switch - Center Console, ignition ON.
  2. Test for 9.1 - 12.6 V between the dimming control circuit terminal 8 and ground. NOTE: Verify interior lighting dimming is turned all the way up. If less than 9.1 V Ignition OFF, disconnect the X1 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. If infinite resistance Test for less than 2 ohms in the control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, refer to «Interior Backlighting Malfunction»(/buick/encore/i-2012-2016/remont/exterior-lights/#lighting-system-diagnostic-information-and-procedures) . If greater than 12.6 V Ignition OFF, disconnect the X1 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»(/buick/encore/i-2012-2016/remont/exterior-lights/#lighting-system-diagnostic-information-and-procedures) . If between 9.1- 12.6 V
  3. Ignition OFF, disconnect the harness connector at the K109 Frontview Camera Module, ignition ON.
  4. Test for less than 1 V between the control circuit terminal 6 and ground. If 1 V or greater Repair the short to voltage on the circuit. If less than 1 V
  5. Ignition OFF.
  6. Test for infinite resistance between the control circuit terminal 6 and ground. If less than infinite resistance Repair the short to ground on the circuit. If infinite resistance
  7. Test for less than 5 ohms between the K109 Frontview Camera Module terminal 4 and S48E Multifunction Switch - Center Console circuit terminal 6. If greater than 5 ohms Repair the open/high resistance in the circuit. If less than 5 ohms
  8. Test or replace the S48E Multifunction Switch - Center Console.
  9. Verify the lane departure switch Indicator turns ON and OFF when pressing and releasing the lane departure warning switch. If indicator does not turn on and off Replace K109 Frontview Camera Module. If indicator turns on and off
  10. All OK.

Perform the Diagnostic Repair Verification after completing the repair

  1. «Accessory Switch Replacement (Encore)»(/buick/encore/i-2012-2016/remont/gauges-instrument-panels/#instrument-panel-system-displays-and-gauges) , «Accessory Switch Replacement (Trax)»(/buick/encore/i-2012-2016/remont/gauges-instrument-panels/#instrument-panel-system-displays-and-gauges)
  2. «Control Module References»(/buick/encore/i-2012-2016/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for frontview camera module replacement, programming and setup.
  1. Perform the «Diagnostic System Check - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The frontview camera module permanently monitors the serial data bus for error messages. When a malfunction is detected by the frontview camera module, the system will be disabled and an error message will be stored in the frontview camera module disable history buffer which is used to store information about the front camera features that are disabled.

  1. Ignition ON
  2. Frontview camera enabled

The frontview camera module detects a malfunction.

  1. The frontview camera module is disabled.
  2. The frontview camera module disable history buffer stores information why the system was disabled.

The condition for setting the DTC is no longer present.

The frontview camera module disable history buffers are used to store information about the frontview camera module features that are disabled. The buffers will only update if the disable condition changes.

Example: If the data received from the steering wheel angle sensor is Invalid across many ignition cycles then it will only appear in 1 history buffer and not all history buffers. If this condition is the current reason why the frontview camera module is disabled then it will be set in frontview camera module disable history buffer 1. If a new reason occurs, such as vehicle speed validity is invalid, then the invalid steering wheel angle sensor fault will shift into disable history buffer 2 and vehicle speed validity invalid will be in disable history buffer 1. Since there are only 4 disable history buffers, the invalid steering wheel angle sensor will age out if 4 other disable reasons occur since the last invalid steering wheel angle sensor event occurred. Frontview camera module disable history buffer 1 contains the current reason that one of the frontview camera module features is disabled.

The frontview camera module disable history buffers can display the following values

  1. Lane Departure Warning Indicator Malfunction
  2. Lane Departure Warning Switch Malfunction
  3. Camera Obstructed
  4. Accelerator Pedal Position Out of Range
  5. Driven Wheel Speed Signal Invalid
  6. Non-Driven Wheel Speed Signal Invalid
  7. Brake Pedal Moderate Travel Signal Invalid
  8. Brake Pedal Initial Travel Position Achieved
  9. Lost Communication with Steering Wheel Angle Sensor Module
  10. Invalid Data Received From Steering Wheel Angle Sensor Module
  11. Forward Collision Alert Switch Malfunction
  12. Clutch Pedal Position (CPP) Sensor Performance
  13. Clutch Pedal Position (CPP) Sensor Performance
  14. Transmission Gear Engaged
  15. Acceleration Sensor Longitudinal Signal
  16. Invalid Data Received From Yaw Rate Sensor Module
  17. Power Mode Controlled by Backup Device
  18. System Power Mode
  19. Overvoltage
  20. Undervoltage
  21. Undefined

Schematic Reference

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify no other DTC is set except for DTC B1011. If any other DTCs are set Diagnose those first. Refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) . If no other DTCs are set
  3. Refer to Diagnostic Aids and Frontview Camera Disable History for what caused B1011 to set. Diagnose the system that set the malfunction.

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for frontview camera module programming and setup

  1. Perform the «Diagnostic System Check - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

When the ignition is turned ON, the front and rear parking assist control module and frontview camera module receives the vehicle identification number (VIN) from the body control module. The modules will compare the VIN received to the VIN stored in memory.

Ignition voltage is between 9-16 V.

The stored VIN does not match the received VIN.

  1. The parking assist system, lane departure warning system, and forward collision alert system is disabled.
  2. The driver information center displays SERVICE PARK ASSIST or SERVICE LANE DEPARTURE SYSTEM.

The stored VIN matches the VIN stored in the body control module.

Schematic Reference

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify DTC B1015 is not. If DTC B1015 is set Program the control module the DTC originally set in. Verify the DTC does not set. If the DTC is sets, replace the control module the DTC set in. If the DTC does not set All OK If DTC B1015 is not set
  3. All OK

Perform the Diagnostic Repair Verification after completing the repair

Control Module References for the front and rear parking assist control module and frontview camera module replacement, programming and setup.

  1. Perform the «Diagnostic System Check - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

For symptom byte information, refer to Symptom Byte List .

The side detection system uses two modules B218L Side Object Sensor Module - Left and B218R Side Object Sensor Module - Right. The left module is the master and is on the vehicle's serial data bus and communicates to the right module on a private bus. The internal fault detection is handled inside the B218L Side Object Sensor Module - Left. No external circuit diagnosis is involved.

  1. The B218L Side Object Sensor Module - Left runs the program to detect an internal fault when power up is commanded.

The B218L Side Object Sensor Module - Left has detected an internal malfunction.

  1. The side object sensor system is disabled.
  2. The driver information center displays SERVICE SIDE DETECTION SYSTEM
  1. A current DTC clears when the malfunction is no longer present.
  2. A history DTC clears when the device ignition cycle counter reaches the reset threshold of 50, without a repeat of the malfunction.
  1. This DTC may be stored as a history DTC without affecting the operation of the B218L Side Object Sensor Module - Left.
  2. Do not replace B218L Side Object Sensor Module - Left based only on DTC B101D being set in history.
  3. If DTC B101D is set as current, replace the B218L Side Object Sensor Module - Left.
  4. Since the left module is the master, if it is replaced, there still may be a problem with the right side as the module may have been unable to report it. Once the left module is replaced, check DTCs and verify operation of the system to assure proper functionality.

Schematic Reference

  1. «Data Communication Schematics (Encore)»(/buick/encore/i-2012-2016/remont/communication-devices/#data-communication-system) , «Data Communication Schematics (Trax)»(/buick/encore/i-2012-2016/remont/communication-devices/#data-communication-system)
  2. «Control Module References»(/buick/encore/i-2012-2016/remont/communication-devices/#programming-and-setup-all-systems__control-module-references)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify DTC B101D is not set. If DTC B101D is set Replace the B218L Side Object Sensor Module - Left. Verify no new DTCs set and side object system operates properly. If there are new DTCs refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) , or if the system does not operate properly, refer to «Side Object System Malfunction»(/buick/encore/i-2012-2016/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system) . If there are no new DTCs and the side object system operates properly If DTC B101D is not set
  3. All OK

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for B218L Side Object Sensor Module - Left replacement, programming and setup.

  1. Perform the «Diagnostic System Check - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
8 V ReferenceB1405 02B0958 06, B0959 06, B0960 06, B0961 06, B1405 03B0958 06, B0959 06, B0960 06, B0961 06, B1405 07
Left Rear Object Sensor SignalB0958 06B0958 06B0958 01B0958 08, B0958 21
Left Middle Rear Object Sensor SignalB0959 06B0959 06B0959 01B0959 08, B0959 21
Right Middle Rear Object Sensor SignalB0960 06B0960 06B0960 01B0960 08, B0960 21
Right Rear Object Sensor SignalB0961 06B0961 06B0961 01B0961 08, B0961 21
Low ReferenceB0958 01, B0959 01, B0960 01, B0961 01

The object sensors are 3-wire sensors that are used to determine the distance between the vehicle and an object of interest. The front and rear parking assist control module supplies 8 V to the object sensors via the object sensor supply voltage circuit and provides ground via the object sensor low reference circuit. The front and rear parking assist control module triggers the sensors in a sequential loop. After each sensor transmits, the front and rear parking assist control module uses the sensor echo received through the object sensor signal circuit to calculate the distance and position of an object.

  1. Ignition ON, engine RUNNING
  2. Transmission in REVERSE

B1405 02

The rear parking assist control module has detected the object sensor supply voltage circuit is shorted to ground.

B1405 03

The rear parking assist control module has detected the object sensor supply voltage circuit is less than 7.2 V.

B1405 07

The rear parking assist control module has detected the object sensor supply voltage circuit is greater than 9.2 V.

  1. The parking assist system is disabled.
  2. The driver information center displays SERVICE PARK ASSIST.

The condition for setting the DTC is no longer present.

Schematic Reference

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON, engine running, transmission in R.
  2. Verify the scan tool Park Assist Sensor Reference Voltage parameter is between 7.2-9.2 V. If Park Assist Sensor Reference Voltage is not between 7.2-9.2 V Refer to Circuit/System Testing If Park Assist Sensor Reference Voltage is between 7.2-9.2 V
  3. All OK.
  1. Ignition OFF, disconnect the X2 harness connector at the K41R Rear Parking Assist Control Module, ignition ON.
  2. Test for less than 1 V between the 8 V reference circuit terminal 4 and ground. If 1 V or greater Repair the short to voltage on the circuit. If less than 1 V
  3. Ignition OFF.
  4. Test for infinite resistance between the 8 V reference circuit terminal 4 and ground. If less than infinite resistance Repair the short to ground on the circuit. If infinite resistance
  5. Replace the K41R Rear Parking Assist Control Module.

Perform the Diagnostic Repair Verification after completing the repair.

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

  1. Perform the «Diagnostic System Check - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
8 V ReferenceB1405 02B0954 06, B0955 06, B0956 06, B0957 06, B0958 06, B0959 06, B0960 06, B0961 06, B1405 03B0954 06, B0955 06, B0956 06, B0957 06, B0958 06, B0959 06, B0960 06, B0961 06, B1405 07
Left Front Object Sensor SignalB0954 06B0954 06B0954 01B0954 08, B0954 21
Left Middle Front Object Sensor SignalB0955 06B0955 06B0955 01B0955 08, B0955 21
Right Middle Front Object Sensor SignalB0956 06B0956 06B0956 01B0956 08, B0956 21
Right Front Object Sensor SignalB0957 06B0957 06B0957 01B0957 08, B0957 21
Left Rear Object Sensor SignalB0958 06B0958 06B0958 01B0958 08, B0958 21
Left Middle Rear Object Sensor SignalB0959 06B0959 06B0959 01B0959 08, B0959 21
Right Middle Rear Object Sensor SignalB0960 06B0960 06B0960 01B0960 08, B0960 21
Right Rear Object Sensor SignalB0961 06B0961 06B0961 01B0961 08, B0961 21
Low ReferenceB0954 01, B0955 01, B0956 01, B0957 01, B0958 01, B0959 01, B0960 01, B0961 01

The object sensors are 3-wire sensors that are used to determine the distance between the vehicle and an object of interest. The front and rear parking assist control module supplies 8 V to the object sensors via the object sensor supply voltage circuit and provides ground via the object sensor low reference circuit. The front and rear parking assist control module triggers the sensors in a sequential loop. After each sensor transmits, the front and rear parking assist control module uses the sensor echo received through the object sensor signal circuit to calculate the distance and position of an object.

  1. Ignition ON, engine RUNNING
  2. Transmission in REVERSE

B1405 02

The front and rear parking assist control module has detected the object sensor supply voltage circuit is shorted to ground.

B1405 03

The front and rear parking assist control module has detected the object sensor supply voltage circuit is less than 7.2 V.

B1405 07

The front and rear parking assist control module has detected the object sensor supply voltage circuit is greater than 9.2 V.

  1. The parking assist is disabled.
  2. The driver information center displays SERVICE PARK ASSIST.

The condition for setting the DTC is no longer present.

Schematic Reference

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON, engine running, transmission in R.
  2. Verify the scan tool Park Assist Sensor Reference Voltage parameter is between 7.2-9.2 V. If Park Assist Sensor Reference Voltage is not between 7.2-9.2 V Refer to Circuit/System Testing If Park Assist Sensor Reference Voltage is between 7.2-9.2V
  3. All OK.
  1. Ignition OFF, disconnect harness connectors X2 and X3 at the K41 Front and Rear Parking Assist Control Module, ignition ON.
  2. Test for less than 1 V between the 8 V reference circuit terminals listed below and ground. Terminal 4 X2 Terminal 1 X3 If 1 V or greater Repair the short to voltage on the circuit. If less than 1 V
  3. Ignition OFF.
  4. Test for infinite resistance between 8V reference circuit terminals listed below and ground. Terminal 4 X2 Terminal 1 X3 If less than infinite resistance Repair the short to ground on the circuit. If infinite resistance
  5. Replace the K41 Front and Rear Parking Assist Control Module.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Front Object Alarm Sensor Housing Replacement»(/buick/encore/i-2012-2016/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system__front-object-alarm-sensor-housing-replacement)
  2. «Rear Parking Assist Alarm Sensor Replacement»(/buick/encore/i-2012-2016/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system)
  3. «Control Module References»(/buick/encore/i-2012-2016/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for front and rear parking assist control module replacement, programming and setup.
  1. Perform the «Diagnostic System Check - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
SignalB356A 021B356A 05
Ground11
1. Lane departure warning cannot be enabled or disabled, forward collision alert timing sensitivity not adjustable.

The lane departure warning feature is enabled and disabled through the lane departure switch located in the left steering wheel controls switch. When enabled, the frontview camera module will illuminate the indicator located in the switch. The forward collision alert distance is adjustable using the forward collision switch located in the center console. The setting is shown in the driver information center.

When the system is operating and can detect the lane markings, the frontview camera module will request via serial data communications that the instrument panel cluster illuminate the green lane departure ready-to-assist indicator. If the frontview camera module detects that the vehicle has crossed a lane marking without the turn signal being used, the module will request that the instrument cluster flash the yellow lane departure warning indicator. An audible warning will also sound three times when the yellow instrument cluster indicator is flashing.

Ignition ON.

DTC B356A 02

The frontview camera module has detected a short to ground for more than 10 s.

DTC B356A 05

The frontview camera module has detected a short to voltage or an open/high resistance for more than 10 s.

  1. Lane departure and forward collision warning features are disabled.
  2. Service Front Camera is displayed on the driver information center.
  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.

Manually pressing the lane departure warning switch or forward collision alert switch for approximately 10 s will cause this DTC to set.

Schematic Reference

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify the scan tool Lane Departure Warning Switch Status parameter changes between Open and Closed while pressing and releasing the lane departure warning switch. If the parameter does not change Refer to Circuit/System Testing. If the parameter changes
  3. Verify the driver information center displays and adjusts forward collision alert setting while repeatedly pressing and releasing the forward collision switch. The setting should change cycle between far, medium, near, and off. If the display does not change Refer to Circuit/System Testing. If the display changes
  4. All OK.
  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connectors at the S48E Multifunction Switch - Center Console and S70L Steering Wheel Controls Switch - Left. It may take up to 2 min for all vehicle systems to power down.
  2. Test for less than 10 ohms between the following ground circuit terminals and ground: S48E Multifunction Switch - Center Console terminal 9 S70L Steering Wheel Controls Switch - Left terminal 7 If 10 ohms or greater Test for less than 2 ohms in the ground circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
  3. Ignition ON.
  4. Verify the scan tool Lane Departure Warning Switch Status parameter is Open. If not Open Ignition OFF, disconnect the harness connector at the K109 Frontview Camera Module. Test for infinite resistance between the S48E Multifunction Switch - Center Console signal circuit terminal 7 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K109 Frontview Camera Module. If Open
  5. Install a 3 A fused jumper wire between the S48E Multifunction Switch - Center Console signal circuit terminal 7 and ground.
  6. Verify DTC B356A 02 sets in approximately 10 s. If DTC does not set Ignition OFF, remove the jumper wire, disconnect the harness connector at the K109 Frontview Camera Module, ignition ON. Test for less than 1 V between the signal circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K109 Frontview Camera Module. If DTC sets
  7. Test or replace the S48E Multifunction Switch - Center Console or S70L Steering Wheel Controls Switch - Left.

Component Test

Forward Collision Alert Switch

  1. Ignition OFF, disconnect the harness connector at the S70L Steering Wheel Controls Switch - Left.
  2. Test for infinite resistance between the control circuit terminal 2 and ground circuit terminal 7. If less than infinite resistance Replace the S70L Steering Wheel Controls Switch - Left. If infinite resistance
  3. Test for 1.0k - 1.5k ohms between the control circuit terminal 2 and ground circuit terminal 7 while pressing forward collision alert switch. If not between 1.0k - 1.5k ohms Replace the S70L Steering Wheel Controls Switch - Left. If between 1.0k - 1.5k ohms
  4. All OK.

Lane Departure Warning Switch

  1. Ignition OFF, disconnect the harness connector at the S48E Multifunction Switch - Center Console.
  2. Test for infinite resistance between the control circuit terminal 7 and ground circuit terminal 9. If less than infinite resistance Replace the S48E Multifunction Switch - Center Console. If infinite resistance
  3. Test for 3.8k - 5.8k ohms between the control circuit terminal 7 and ground circuit terminal 9 while pressing the lane departure warning switch. If not between 3.8k - 5.8k ohms Replace the S48E Multifunction Switch - Center Console. If between 3.8k - 5.8k ohms
  4. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Accessory Switch Replacement (Encore)»(/buick/encore/i-2012-2016/remont/gauges-instrument-panels/#instrument-panel-system-displays-and-gauges) , «Accessory Switch Replacement (Trax)»(/buick/encore/i-2012-2016/remont/gauges-instrument-panels/#instrument-panel-system-displays-and-gauges)
  2. «Cruise Control Switch Replacement»(/buick/encore/i-2012-2016/remont/cruise-control-systems/#cruise-control-system)
  3. «Control Module References»(/buick/encore/i-2012-2016/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for frontview camera module replacement, programming, and setup.

Symptoms - Object Detection

Note. The following steps must be completed before using the symptom tables

  1. Perform the «Diagnostic System Check - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) before using the Symptom List in order to verify that all of the following are true: There are no DTCs set. The control modules can communicate via the serial data link. NOTE: The rear vision camera does not communicate on the serial data bus.
  2. Review the system operation in order to familiarize yourself with the system functions. Refer to «Object Detection Description and Operation (Rearvision Camera, UVC)»(/buick/encore/i-2012-2016/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system) , «Object Detection Description and Operation (Rear Park Assist, UD7)»(/buick/encore/i-2012-2016/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system__object-detection-description-and-operation-rear) , «Object Detection Description and Operation (Side Blind Zone Alert, UFT)»(/buick/encore/i-2012-2016/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system) , «Object Detection Description and Operation (Rear Cross Traffic Alert, UFG)»(/buick/encore/i-2012-2016/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system) .

Visual/Physical Inspection

  1. Inspect for aftermarket devices which may affect the operation of the system. Refer to «Checking Aftermarket Accessories»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__checking-aftermarket-accessories) .
  2. Inspect the easily accessible or visible system components for obvious damage or conditions which may cause the symptom.
  3. Make sure the parking assist sensors located on the vehicle front and rear bumper are clear. Remove any snow, mud or ice that is blocking the sensors.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Symptom List

  1. «Lane Departure Warning System Malfunction»(/buick/encore/i-2012-2016/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system)
  2. «Parking Assist System Malfunction»(/buick/encore/i-2012-2016/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system)
  3. «Rear Vision Camera System Malfunction»(/buick/encore/i-2012-2016/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system)
  1. Perform the «Diagnostic System Check - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
B+22
Switch SignalB356A 0211
Switch Ground11
1. Forward Collision Alert timing sensitivity not adjustable. 2. Forward Collision System Inoperative

The forward collision alert system is controlled by the front view camera module mounted on the windshield. The forward collision alert system is always active and operates at speeds above 40 km/h (25 mph). When the system detects a vehicle in the path ahead, the green vehicle ahead alert indicator in the instrument cluster is illuminated. When approaching another vehicle too rapidly, the collision alert symbol will flash in the instrument cluster and the radio will simultaneously give an audible alert sound. The red collision alert display will stay continuously illuminated if the vehicle ahead remains much too close. These actions are requested by the front view camera module via serial data to the instrument cluster. The forward collision alert switch is part of the left steering wheel controls and is used to adjust the timing sensitivity of the front collision alert system.

Certain factors will affect the operation of the forward collision alert system. Forward collision alert does not warn the driver of any objects that are not detected as a vehicle, like e.g. pedestrians, animals, signs, guard rails, bridges, construction barrels or other stationary or slow moving objects. In some cases the camera may detect a vehicle that is not in the path ahead, or the system may occasionally provide unrealistic alerts. This could respond to a turning vehicle ahead, guard rails, traffic signs, or other stationary objects. This is normal operation, the vehicle does not need service. When the system is operating properly, the green vehicle ahead alert indicator will illuminate on the vehicle direction display when the system detects a vehicle in the path ahead. This indicates that all of the required operating conditions are met. The green vehicle ahead alert indicator will not appear when the system is having difficulty seeing other vehicles on the road or if the view of the front view camera is blocked with mud, dirt, snow, ice, or slush, if the windshield is damaged, or when weather limits visibility, such as while driving in fog, rain, or snow conditions. This is normal operation, the vehicle does not need service.

Additionally, the Front View Camera Disable History can give useful hints about what affected the operation of the lane departure warning system. For the Front View Camera Disable History refer to DTC B1011 .

Schematic Reference

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Note. Refer to Diagnostic Aids before performing Circuit/System Verification.

  1. Ignition ON.
  2. Verify the scan tool Forward Collision Alert Function Status parameter is Off, Disabled, Not Ready To Assist or Ready To Assist. If the parameter is Malfunction Refer to Circuit/System Testing - Frontview Camera Module Malfunction If the parameter is not Malfunction
  3. Verify the driver information center displays and adjusts forward collision alert setting while repeatedly pressing and releasing the forward collision switch. The setting should cycle between far, medium, near, and off. If the display does not change Refer to Circuit/System Testing - Forward Collision Alert Switch Malfunction. If the display changes
  4. Verify the K109 Frontview Camera Module has good visibility to the road ahead. If visibility is poor Clean windshield. If visibility is good
  5. All OK.

Note. You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.

Frontview Camera Module Malfunction

  1. Ignition ON.
  2. Verify no DTCs are set. If DTCs are set Diagnose and repair DTCs. Refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) . If no DTCs are set
  3. Ignition OFF and all vehicle systems OFF. It may take up to 2 min for all vehicle systems to power down. Disconnect the harness connector at the K109 Frontview Camera Module.
  4. Test for less than 10 ohms between the ground circuit terminal 1 and ground. If 10 ohms or greater Ignition OFF. Test for less than 2 ohms in the ground circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
  5. Verify a test lamp illuminates between the B+ circuit terminal 3 and ground. If the test lamp does not illuminate and the circuit fuse is good Ignition OFF. Test for less than 2 ohms in the B+ circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, verify the fuse is not open and there is voltage at the fuse. If the test lamp does not illuminate and the circuit fuse is open Ignition OFF. Test for infinite resistance between the B+ 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. If the test lamp illuminates
  6. Ignition ON.
  7. Test for less than 1 V between the signal circuit terminal 10 and ground. If 1 V or greater Disconnect the harness connector at S70L Steering Wheel Controls Switch - Left. Test for less than 1V between the signal circuit terminal 10 and ground. If 1V or greater, repair the short to voltage on the signal circuit. If less than 1 V
  8. Ignition OFF.
  9. Test for infinite resistance between the signal circuit terminal 10 and ground with the forward collision alert switch not pressed. If less than infinite resistance Disconnect the harness connector at the S70L Steering Wheel Controls Switch - Left. Test for infinite resistance between the signal circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance test or replace the S70L Steering Wheel Controls Switch - Left. If infinite resistance
  10. Test for 1.2k-1.4k ohms between the signal circuit terminal 10 and ground with the forward collision alert switch pressed. If not between 1.2k-1.4k ohms Disconnect the harness connector at the S70L Steering Wheel Controls Switch - Left Test for less than 2 ohms in the signal circuit from end to end. If greater than 2 ohms Repair the open/high resistance in the circuit. If 2 ohms or less Test or replace the S70L Steering Wheel Controls Switch - Left. If between 1.2k-1.4k ohms
  11. Connect the harness connector of the S70L Steering Wheel Controls Switch - Left and K109 Frontview Camera Module.
  12. Verify the scan tool Forward Collision Alert Function Status parameter is Off, Disabled, Not Ready To Assist or Ready To Assist. If parameter is Malfunction Replace K109 Frontview Camera Module. If parameter is not Malfunction
  13. All OK.

Forward Collision Alert Switch Malfunction

  1. Ignition OFF and all vehicle systems OFF. It may take up to 2 min for all vehicle systems to power down. Disconnect the harness connector at the S70L Steering Wheel Controls Switch - Left.
  2. Test for less than 5 ohms between the ground circuit terminal 7 and ground. If 5 ohms or greater Ignition OFF. Test for less than 2 ohms in the ground circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 5 ohms
  3. Ignition ON.
  4. Verify the scan tool Lane Departure Warning Switch Status parameter is Open. If not Open Ignition OFF, disconnect the harness connector at the K109 Frontview Camera Module. Test for infinite resistance between the signal circuit terminal 2 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K109 Frontview Camera Module. If Open
  5. Install a 3 A fused jumper wire between the signal circuit terminal 2 and the ground circuit terminal 7.
  6. Verify DTC B356A 02 sets. If DTC does not set Ignition OFF, remove the jumper wire, disconnect the harness connector at the K109 Frontview Camera Module, ignition ON. Test for less than 1 V between the signal circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K109 Frontview Camera Module. If DTC sets
  7. Test or replace the S70L Steering Wheel Controls Switch - Left.

Switch Static Test

  1. Ignition OFF, disconnect the harness connector at the S70L Steering Wheel Controls Switch - Left.
  2. Test for infinite resistance between the control circuit terminal 2 and ground circuit terminal 7. If less than infinite resistance Replace the S70L Steering Wheel Controls Switch - Left. If infinite resistance
  3. Test for 1.0k - 1.5k ohms between the control circuit terminal 2 and ground circuit terminal 7 while pressing forward collision alert switch. If not between 1.0k - 1.5k ohms Replace the S70L Steering Wheel Controls Switch - Left. If between 1.0k - 1.5k ohms
  4. Test for 3.8k - 5.8k ohms between the control circuit terminal 2 and ground circuit terminal 7 while pressing lane departure warning switch. If not between 3.8k - 5.8k ohms Replace the S70L Steering Wheel Controls Switch - Left. If between 3.8k - 5.8k ohms
  5. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Cruise Control Switch Replacement»(/buick/encore/i-2012-2016/remont/cruise-control-systems/#cruise-control-system)
  2. «Control Module References»(/buick/encore/i-2012-2016/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for frontview camera module replacement, programming and setup.
  1. Perform the «Diagnostic System Check - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The ultrasonic parking assist system is designed to identify and notify the driver of an object in the vehicle's path when reversing at speeds of less than 8 km/h (5 MPH). The distance and location of the object is determined by four object sensors located in the rear bumper. The parking assist system will notify the driver using an audible signal through the radio.

When the "Park Assist Off", "Park Asst Blocked See Owners Manual", or "Park Assist Blocked See Owners Manual" message is displayed in the DIC the disable reason is stored in the Park Assist Disable History.

The scan tool Park Assist Disable History parameters are a list of the seven previous reasons the parking assist system was disabled. These parameters may help in the diagnosis of an intermittent concern or a customer concern which is the result of normal system operation. The following is a brief description of potential causes which may aid in diagnosis

  1. Manual Disable - The parking assist system has been disabled by the vehicle operator through the audio system personalization menu.
  2. Hitch/Object Attached - The front and rear parking assist control module is detecting an object that is attached to the vehicle. Common items such as a hitch receiver, trailer, or a bicycle rack may cause this concern. Additionally, damage to the rear of the vehicle or a misaligned sensor may cause this concern. If the vehicle is damaged in a manner that causes the sensor to detect the bumper itself, the front and rear parking assist control module will interpret this as an attached object and disable the system. Carefully inspect the bumper, bumper mounting surface, and sensor retainers before continuing with normal diagnosis. After the detected cause has been addressed the vehicle must be driven at speed greater than 40 km/h (25 MPH).
  3. Reverse Overspeed - The vehicle is travelling too fast in reverse at speeds of greater than 8 km/h (5 MPH).
  4. Inhibit - The front and rear parking assist control module has lost or received invalid GMLAN signal(s).
  5. Sensor Disturbance - An outside interference is causing sensor movement. Such interference may be caused by a heavy pounding, like that of a nearby jackhammer, or large changes in pressure, such as a large truck's air brakes.
  6. Sensor Ring Time - If the sensor fails its own diagnostic initialization the front and rear parking assist control module will set this error. After the detected cause has been addressed the vehicle must be driven at speed greater than 40 km/h (25 MPH). The following is a list of reasons this cause may have set: One or more of the sensors may be blocked by snow, mud, ice, or other debris. This might happen after going through a car wash in cold weather. Silicone insulator surrounding sensor may be missing, cut, or twisted. Improperly installed sensor, sensor may be crooked due to a tight wire harness. One or more of the sensors may be scratched or the paint may be chipped. Excessive paint thickness on a sensor may cause an excessive sensor ring time. When replacing or refinishing a sensor, do not apply an excessive amount of paint or clear coat.

Schematic Reference

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Manual Transmission

  1. Ignition ON, transmission in REVERSE, verify the engine control module (ECM) scan tool Reverse Position Switch parameter is Active. If not the specified value, refer to «Backup Lamps Malfunction (Manual Transmission)»(/buick/encore/i-2012-2016/remont/exterior-lights/#lighting-system-diagnostic-information-and-procedures) , «Backup Lamps Malfunction (Automatic transmission)»(/buick/encore/i-2012-2016/remont/exterior-lights/#lighting-system-diagnostic-information-and-procedures) .
  2. Verify the scan tool Park Assist System Status parameter displays Enable. NOTE: After completing the next step the vehicle might need to be driven in the forward direction at speed greater than 40 km/h (25 MPH). If not the specified values, refer to Diagnostic Aids and the scan tool Park Assist Disable History parameters to determine the cause of the inhibit.
  3. If all tests normal, replace the K41 Front and Rear Parking Assist Control Module.

Automatic Transmission

  1. Ignition ON, transmission in REVERSE, verify the scan tool Park Assist System Status parameter displays Enable. NOTE: After completing the next step the vehicle might need to be driven in the forward direction at speed greater than 40 km/h (25 MPH). If not the specified values, refer to Diagnostic Aids and the scan tool Park Assist Disable History parameters to determine the cause of the inhibit.
  2. If all tests normal, replace the K41 Front and Rear Parking Assist Control Module.

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for front and rear parking assist control module replacement, programming and setup

  1. Perform the «Diagnostic System Check - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Ignition11
Backup Signal112
Camera Module signal +311
Camera Module signal311
Shield333
Ground1
1. Rear Vision Camera no image displayed 2. Rear Vision Camera image always displayed 3. Poor Quality Image

When the transmission is placed into REVERSE, a 12 V signal is sent to the rearview camera indicating that camera operation is requested. Ignition voltage and ground are supplied to the rearview camera. The rearview camera sends video information to the radio through a video signal + and a video signal - circuit. A grounded shielding also wraps the video signal circuits to reduce electronic interference which may degrade the video signal and cause a distorted or otherwise degraded image.

A poor video image can be caused by ice, snow, and mud buildup on the lens of the rearview camera. Also, extreme lighting conditions can affect performance, such as operating in the dark or with bright sunlight shining on the camera. Extreme high or low temperatures can also affect the image quality. An open in the shield of the video signal circuit can also cause a distorted screen.

Schematic Reference

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)
  1. Ignition ON.
  2. Verify that DTC B2545 is not set. If the DTC is set Refer to «DTC B2545»(/buick/encore/i-2012-2016/remont/exterior-lights/#lighting-system-diagnostic-information-and-procedures) . If the DTC is not set
  3. Verify there is no debris on the rearview camera lens and that the bezel and bezel seal are not damaged. If debris are found on the lens Clean the lens. If the lens, bezel, or bezel seal are damaged, replace as necessary. If no debris on the lens
  4. Engine running, transmission in REVERSE.
  5. Verify the backup lamps are On. If the backup lamps are not ON Refer to «Backup Lamps Malfunction (Manual Transmission)»(/buick/encore/i-2012-2016/remont/exterior-lights/#lighting-system-diagnostic-information-and-procedures) , «Backup Lamps Malfunction (Automatic transmission)»(/buick/encore/i-2012-2016/remont/exterior-lights/#lighting-system-diagnostic-information-and-procedures) . If the backup lamps are ON
  6. Engine running, transmission in REVERSE.
  7. Verify a clear rear vision image is displayed on the radio. If a clear image is not displayed Refer to Circuit/System Testing. If a clear image is displayed
  8. All OK.

Note. Circuit/System Verification must be performed before Circuit/System Testing.

  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the B87 Rearview Camera. It may take up to 2 min for all vehicle systems to power down.
  2. Test for less than 10 ohms between the ground circuit terminal 5 and ground. If 10 ohms or greater Test for less than 2 ohms in the ground circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
  3. Ignition ON.
  4. Verify a test lamp illuminates between the ignition circuit terminal 6 and ground. If the test lamp does not illuminate and the circuit fuse is good Ignition OFF. Test for less than 2 ohms in the ignition circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, verify the fuse is OK and there is voltage at the fuse. If the test lamp does not illuminate and the circuit fuse is open Ignition OFF. Test for infinite resistance between the ignition circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, refer to «Power Mode Mismatch»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures) . If the test lamp illuminates
  5. Engine running, park brake applied, transmission in REVERSE.
  6. Verify a test lamp illuminates between the control circuit terminal 3 and ground. If the test lamp does not illuminate Ignition OFF, disconnect the X7 harness connector at the K9 Body Control Module and remove both E5 Backup Lamps. 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 Test for less than 2 ohms in the control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K9 Body Control Module. If the test lamp illuminates
  7. Ignition OFF, disconnect the X4 harness connector at the A11 Radio, ignition ON.
  8. Test for less than 1 V between the signal circuit terminal listed below and ground: B87 Rearview Camera signal (+) circuit terminal 1. B87 Rearview Camera signal (-) circuit terminal 4. If 1 V or greater Repair the short to voltage on the circuit. If less than 1 V
  9. Test for infinite resistance between the signal circuit terminal listed below and ground: B87 Rearview Camera signal (+) circuit terminal 1. B87 Rearview Camera signal (-) circuit terminal 4. If less than infinite resistance Repair the short to ground on the circuit. If infinite resistance
  10. Test for less than 2 ohms in the following signal (+) circuits end to end. B87 Rearview Camera signal (+) circuit terminal 1 to A11 Radio X4, terminal 5 B87 Rearview Camera signal (-) circuit terminal 4 to A11 Radio X4, terminal 15 If 2 ohms or greater Repair the open/high resistance in the appropriate circuit. If less than 2 ohms
  11. Test for less than 2 ohms in the signal (-) circuit end to end. B87 Rearview Camera signal (+) circuit terminal 1 to A11 Radio X4, terminal 5 B87 Rearview Camera signal (-) circuit terminal 4 to A11 Radio X4, terminal 15 If 2 ohms or greater Test the appropriate signal circuit for an open/high resistance. If less than 2 ohms
  12. Replace the B87 Rearview Camera.
  13. Engine running, transmission in REVERSE.
  14. Verify a clear rear vision image is displayed on the driver information display. If a clear rear vision image is not displayed Refer to «Radio Information Display Malfunction (Monochrome Display)»(/buick/encore/i-2012-2016/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system) , «Radio Information Display Malfunction (Color Display)»(/buick/encore/i-2012-2016/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system) . If a clear rear vision image displayed
  15. All Ok.

Perform the Diagnostic Repair Verification after completing the repair.

  1. Perform the «Diagnostic System Check - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Side Object Sensor - Left GroundU02321
Side Object Sensor - Left B+1U0232
Side Object Sensor - Left, Data Communication (terminal 1)1U02321
Side Object Sensor - Left, Data Communication (terminal 4)U18A6U18A6U18A6
Side Object Sensor - Left, Data Communication (terminal 5)U18A6U18A6
Side Object Sensor - Left, Control (terminal 3)U18A6U18A6
Side Object Sensor - Right GroundU18A6U18A6
Side Object Sensor - Right B+U18A6U18A6
Side Object Sensor - Right, Left Indicator Control CircuitB094C 39, 312
Side Object Sensor - Right, Right Indicator Control CircuitB094C 39, 312
1. Side blind zone alert malfunction 2. Side blind zone alert Indicator on all the time 3. Opposite side blind zone alert indicator flashes rapidly

The side object sensor modules are located on each side of the vehicle behind the rear fascia and are not directly visible from outside the vehicle. The sensors use radar to determine the presence of objects nearby. The left side object sensor is the master that communicates on serial data. There is a private communication network between the left and right sensors. The scan tool can communicate only with the left sensor.

Side blind zone alert is active when the vehicle is out of park or the parking brake is off on manual transmission vehicles. If a vehicle is detected in the side blind zone, the warning symbols will turn illuminate on the appropriate side. The warning symbols will vary brightness based on the ambient light conditions.

When an object is detected in the left side blind zone, the side object sensor module sends a message to the right sensor through serial data. The right sensor then supplies voltage to illuminate the visual indicator on the left side outside rear view mirror. When an object is detected in the right side blind zone, the right side object sensor will supply a voltage to illuminate the visual indicator on the right side outside rear view mirror. Each sensor is supplied B+ and ground. Ground is provided through the outside rearview mirror harness.

  1. When the ignition is turned on, or the engine is started, both outside rearview mirror displays will briefly come on to indicate that the system is operating.
  2. The conditions for disabling the side blind zone alert system are captured by DTCs. The drivers information center will display Service Side Detection System if one of the sensors has failed.
  3. The side blind zone system will be disabled if the driver has selected the Off mode through vehicle personalization menus. The selected mode is retained over ignition cycles. A driver information center message stating that the side blind zone system is off shall be displayed and the outside mirror indicators will be OFF.
  4. The side blind zone may be temporarily unavailable if 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.
  5. Because the sensors are NOT identical, they must NOT be swapped from one side of the vehicle to the other in an attempt to isolate a concern. Sensors should also NOT be swapped from one vehicle to another.
  6. 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.
  7. 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.

Schematic Reference

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify the scan tool can communicate with the left side object sensor. If the scan tool can not communicate with the left side object sensor Refer to Circuit/System Testing - Left Side Object Sensor Malfunction. If the scan tool can communicate with the left side object sensor
  3. Verify DTC U18A6 is not present If DTC U18A6 is present Diagnose this DTC first. Refer to Diagnostic Trouble Code List. If DTC U18A6 is not present
  4. Ignition OFF, ignition ON.
  5. Verify that both side blind zone alert system indicators located in the outside rearview mirrors briefly turn ON and then turn OFF during the system self test. If both side blind zone alert indicators do not briefly turn ON and OFF Verify the system is enabled If disabled, refer to diagnostic aids for cause of disable. If enabled, refer to Circuit/System Testing - Side Object Indicator Malfunction. If only one indicator does not briefly illuminate during the self test Refer to Circuit/System Testing - Side Object Indicator Malfunction. If both side blind zone alert indicators briefly turn ON and OFF
  6. All OK.

Left Side Object Sensor Malfunction

  1. Ignition OFF and all vehicle systems OFF. Disconnect the harness connector at the B218L Side Object Sensor Module - Left. It may take up to 2 min for all vehicle systems to power down.
  2. Test for less than 10 ohms between ground circuit terminal 7 and ground. If 10 ohms or greater Ignition OFF. Test for less than 2 ohms in the ground circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
  3. Verify a test lamp illuminates between the B+ circuit terminal 8 and ground. If the test lamp does not illuminate and the circuit fuse is good Ignition Off. Test for less than 2 ohms in the B+ circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, verify the fuse is not open and there is voltage at the fuse. If the test lamp does not illuminate and the circuit fuse is open Ignition OFF. Test for infinite resistance between the B+ circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the B218L Side Object Sensor Module - Left. If the test lamp illuminates
  4. Ignition OFF and all vehicle systems OFF. Disconnect the It may take up to 2 minutes for all vehicle systems to power down.
  5. Test for less than 2 ohms between the serial data circuit terminal 1 and the DLC terminal 1. If 2 ohms or greater Repair the open/high resistance in the circuit. If less than 2 ohms
  6. Replace B218L Side Object Sensor Module - Left.

Side Object Indicator Malfunction

  1. Ignition OFF and all vehicle systems OFF, remove the appropriate outside rearview mirror glass and disconnect the P43 Side Object Detection Indicator connector. It may take up to 2 min for all vehicle systems to power down.
  2. Test for less than 10 ohms between the ground circuit terminal and ground. If 10 ohms or greater Ignition OFF. Test for less than 2 ohms in the ground circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
  3. Ignition ON, connect a test lamp between the control circuit terminal and the ground circuit terminal.
  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 B218R Side Object Sensor Module - Right. 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 Test for less than 2 ohms in the control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the B218R Side Object Sensor Module - Right. If the test lamp is always ON Ignition OFF, disconnect the harness connector at the B218R Side Object Sensor Module - Right, 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 B218R Side Object Sensor Module - Right. If the test lamp turns ON and OFF
  5. Test or replace the appropriate A9 Outside Rearview Mirror Glass.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Outside Rearview Mirror Glass Replacement»(/buick/encore/i-2012-2016/remont/mirrors/#mirror-system)
  2. «Control Module References»(/buick/encore/i-2012-2016/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for side object sensor module replacement, programming and setup.
  1. Perform the «Diagnostic System Check - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Lane Departure Warning Switch Ground Circuit2
Lane Departure Warning Switch Signal CircuitB356A 0222
Lane Departure Warning Switch Indicator Control CircuitB0987 06B0987 01
Lane Departure Warning Switch Indicator Power Circuit11
1. Lane Departure Warning Inoperative. 2. Lane Departure Warning Switch Illumination cannot be turned ON or OFF.

The lane departure warning system is enabled and disabled through the lane departure switch. When enabled, the lane departure warning indicator will illuminate. The switch and indicator are connected to the frontview camera module. The frontview camera module supplies a reference voltage to the lane departure switch. When the switch is pressed, the signal circuit is grounded. When enabled, the frontview camera module will illuminate the indicator located in the switch when lane departure warning system is enabled.

When the system is operating and can detect the lane markings, the frontview camera module will request via serial data communications that the instrument cluster illuminates the green lane departure ready-to-assist indicator. If the frontview camera module detects that the vehicle unintentionally crosses a lane marking without the turn signal being used, the module will request the vehicle direction display to flash the amber lane departure warning indicator. An audible warning will also sound three times when the amber lane departure warning indicator in the vehicle direction display is flashing.

Certain factors will affect the operation of the lane departure warning system. When the system is operating properly, the green lane departure warning indicator will illuminate on the instrument cluster. This indicates that all of the required operating conditions to permit lane departure warning have been met. The green lane departure warning indicator will not appear when the system is having difficulty seeing the lines on the road or if the view of the front view camera is blocked with mud, dirt, snow, ice, or slush, if the windshield is damaged, or when weather limits visibility, such as while driving in fog, rain, or snow conditions. This is normal operation, the vehicle does not need service. Additionally, lane departure warnings may occasionally occur in a properly operating vehicle due to tar marks, shadows, cracks in the road, or other road imperfections. This is normal system operation and the vehicle does not require service. The driver information center may also display Lane Departure System Unavailable due to the temporary conditions listed above.

Additionally, the Front View Camera Disable History can give useful hints about what affected the operation of the lane departure warning system. For the Front View Camera Disable History, refer to DTC B1011 .

Schematic Reference

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Note. Refer to Diagnostic Aids before performing Circuit/System Verification.

  1. Ignition ON.
  2. Verify that DTC B356A is not set. If the DTC is set Refer to «DTC B356A»(/buick/encore/i-2012-2016/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system) . If the DTC is not set
  3. Verify that DTC B0987 is not set. If the DTC is set Refer to «DTC B0987»(/buick/encore/i-2012-2016/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system) . If the DTC is not set
  4. Verify the scan tool Frontview Camera System Status parameter is Normal. If the parameter is Undefined or Malfunction Refer to Diagnostic Aids. If the parameter is Normal
  5. Verify the scan tool Lane Departure Warning Switch Status parameter changes between Open and Closed while pressing and releasing the lane departure warning switch. If the parameter does not change between Open and Closed Refer to Lane Departure Warning Switch Malfunction in Circuit/System Testing. If the parameter changes between Open and Closed
  6. Verify the scan tool Lane Departure Warning Switch 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 Lane Departure Warning Switch Indicator Malfunction in Circuit/System Testing. If the indicator turns on and off
  7. Verify the area of the K109 Frontview Camera Module for contamination. If it needs to be cleaned Clean the windshield. If it does not need to be cleaned
  8. All OK.

Lane Departure Warning Switch Malfunction

  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S48E Multifunction Switch - Center Console. It may take up to 2 min for all vehicle systems to power down.
  2. Test for less than 10 ohms between the ground circuit terminal 9 and ground. If 10 ohms or greater Test for less than 2 ohms in the ground circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
  3. Ignition ON.
  4. Verify the scan tool Lane Departure Warning Switch Status parameter is Open. If not Open Ignition OFF, disconnect the harness connector at the K109 Frontview Camera Module. Test for infinite resistance between the S48E Multifunction Switch - Center Console signal circuit terminal 7 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K109 Frontview Camera Module. If Open
  5. Install a 3 A fused jumper wire between the signal circuit terminal 7 and ground.
  6. Verify DTC B356A 02 sets in approximately 10s. If DTC does not set Ignition OFF, remove the jumper wire, disconnect the harness connector at the K109 Frontview Camera Module, ignition ON. Test for less than 1 V between the signal circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K109 Frontview Camera Module. If DTC sets
  7. Test or replace the S48E Multifunction Switch - Center Console.

Lane Departure Warning Switch Indicator Malfunction

  1. Ignition OFF, and all vehicle systems OFF, disconnect the harness connector at the S48E Multifunction Switch - Center Console, ignition ON.
  2. Test for 9.1 - 12.6 V between the dimming control circuit terminal 8 and ground. NOTE: Verify interior lighting dimming is turned all the way up. If less than 9.1 V Ignition OFF, disconnect the X1 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. If infinite resistance Test for less than 2 ohms in the control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, refer to «Interior Backlighting Malfunction»(/buick/encore/i-2012-2016/remont/exterior-lights/#lighting-system-diagnostic-information-and-procedures) . If greater than 12.6 V Ignition OFF, disconnect the X1 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»(/buick/encore/i-2012-2016/remont/exterior-lights/#lighting-system-diagnostic-information-and-procedures) . If between 9.1-12.6 V
  3. Ignition OFF, disconnect the harness connector at the K109 Frontview Camera Module, ignition ON.
  4. Test for less than 1 V between the control circuit terminal 6 and ground. If 1 V or greater Repair the short to voltage on the circuit. If less than 1 V
  5. Ignition OFF.
  6. Test for infinite resistance between the control circuit terminal 6 and ground. If less than infinite resistance Repair the short to ground on the circuit. If infinite resistance
  7. Test for less than 5 ohms between the K109 Frontview Camera Module terminal 4 and S48E Multifunction Switch - Center Console circuit terminal 6. If greater than 5 ohms Repair the open/high resistance in the circuit. If less than 5 ohms
  8. Test or replace the S48E Multifunction Switch - Center Console.
  9. Verify the lane departure switch Indicator turns ON and OFF when pressing and releasing the lane departure warning switch. If indicator does not turn on and off Replace K109 Frontview Camera Module. If indicator turns on and off
  10. All OK.

Component Testing

Lane Departure Switch

  1. Ignition OFF, disconnect the harness connector at the S48E Multifunction Switch - Center Console.
  2. Test for infinite resistance between the signal terminal 7 and the ground terminal 9 with the switch in the open position. If less than infinite resistance Replace the S48E Multifunction Switch - Center Console. If infinite resistance
  3. Test for 3.9k - 5.8k ohms between the signal terminal 3 and the ground terminal 9 with the switch in the closed position. If not between 3.9k - 5.8k ohms Replace the S48E Multifunction Switch - Center Console. If between 3.9k - 5.8k ohms
  4. All OK

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Accessory Switch Replacement (Encore)»(/buick/encore/i-2012-2016/remont/gauges-instrument-panels/#instrument-panel-system-displays-and-gauges) , «Accessory Switch Replacement (Trax)»(/buick/encore/i-2012-2016/remont/gauges-instrument-panels/#instrument-panel-system-displays-and-gauges)
  2. «Control Module References»(/buick/encore/i-2012-2016/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for frontview camera module replacement, programming and setup.

Scheme 8

Scheme 8: Rear Object Alarm Control Module Replacement
Scheme 8: Rear Object Alarm Control Module Replacement
CalloutComponent Name
Preliminary Procedure Remove the quarter stowage pocket door - right side. Refer to Quarter Stowage Pocket Door Replacement (Left Side) , Quarter Stowage Pocket Door Replacement (Right Side) .
1Park Assist Alarm Control Module Nut (Qty: 3) CAUTION: Refer to Fastener Caution . Tighten 9 (80 lb in)
2Rear Object Alarm Control Module Procedure Disconnect the electrical connectors. For programming and set up, refer to Control Module References .
CAUTION
Refer to Fastener Caution .

Rear Object Alarm Control Module Replacement

Front Object Alarm Sensor Housing Replacement

  1. Remove the front fascia. Refer to «Front Bumper Fascia Replacement (Trax)»(/buick/encore/i-2012-2016/remont/exterior-body-panels/#bumpers-and-fascias) , «Front Bumper Fascia Replacement (Encore)»(/buick/encore/i-2012-2016/remont/exterior-body-panels/#bumpers-and-fascias) .
  2. Disconnect the sensor harness.
  3. Remove the sensor from the sensor housing. The sensor housing must be painted if replaced. If reinstalled, painting will not be necessary.
  4. Sand/grind sonic weld plastic residue from the fascia.
  5. Apply structural adhesive epoxy, Lord Fusor™ 127EZ or equivalent, to fascia at mating surface.
  6. Using the alignment tabs, install the sensor housing to the fascia.
  7. Allow adhesive to cure according to manufacturer's directions.
  8. Install the sensor to the sensor housing.
  9. Connect the electrical harness.
  10. Install the front fascia. Refer to «Front Bumper Fascia Replacement (Trax)»(/buick/encore/i-2012-2016/remont/exterior-body-panels/#bumpers-and-fascias) , «Front Bumper Fascia Replacement (Encore)»(/buick/encore/i-2012-2016/remont/exterior-body-panels/#bumpers-and-fascias) .

Scheme 9

Scheme 9: Front Object Alarm Sensor Wiring Harness Replacement
Scheme 9: Front Object Alarm Sensor Wiring Harness Replacement
CalloutComponent Name
Preliminary Procedures Remove the front bumper fascia. Refer to Front Bumper Fascia Replacement (Trax) , Front Bumper Fascia Replacement (Encore) .
1Front Object Alarm Sensor Wiring Harness Procedure Disconnect the front object alarm sensor wiring harness electrical connectors from the front object sensors. Disconnect the front object alarm sensor wiring harness electrical connectors from the front fascia wiring harness. Using a suitable tool, disconnect the front object alarm sensor wiring harness from the front fascia.

Front Object Alarm Sensor Wiring Harness Replacement

Scheme 10

Scheme 10: Rear Object Sensor Wiring Harness Replacement
Scheme 10: Rear Object Sensor Wiring Harness Replacement
CalloutComponent Name
Preliminary Procedures Remove the rear bumper fascia. Refer to Rear Bumper Fascia Replacement .
1Rear Object Sensor Wiring Harness Procedure Disconnect the rear object sensor wiring harness electrical connectors from the rear object sensors. Disconnect the rear object sensor wiring harness electrical connectors from the rear lamps. Using a suitable tool, disconnect the rear object sensor wiring harness from the rear fascia.

Rear Object Sensor Wiring Harness Replacement

Removal Procedure

  1. Remove rear bumper fascia. Refer to «Rear Bumper Fascia Replacement»(/buick/encore/i-2012-2016/remont/exterior-body-panels/#bumpers-and-fascias) .
  2. Disconnect electrical from the rear object sensor.
  3. Lift the locking tabs on the housing and remove the rear object sensor.

Installation Procedure

  1. Paint the rear object sensor. Refer to «Basecoat/Clearcoat Paint Systems»(/buick/encore/i-2012-2016/remont/paintcoatings/#paint-and-coatings__basecoatclearcoat-paint-systems) .
  2. Ensure the paint does not exceed 6 mils. Use a paint thickness gauge suitable for non-ferrous metals. Refer to «Paint Gauges»(/buick/encore/i-2012-2016/remont/paintcoatings/#paint-and-coatings__paint-gauges) .
  3. Insert the sensor into the housing.
  4. Connect the electrical connector to the rear object sensor.
  5. Install the rear bumper fascia. Refer to «Rear Bumper Fascia Replacement»(/buick/encore/i-2012-2016/remont/exterior-body-panels/#bumpers-and-fascias) .

Scheme 11

Scheme 11: Front View Camera Replacement (Encore)
Scheme 11: Front View Camera Replacement (Encore)
CalloutComponent Name
Preliminary Procedure Remove the windshield outside moisture sensor cover. Refer to Windshield Outside Moisture Sensor Cover Replacement (Encore) .
1Front View Camera Procedure Using a suitable plastic tool, insert the tool between the edge of the front view camera retainers, turn the tool to release the retainers and the camera and rotate downward. Disconnect the electrical connector.

Front View Camera Replacement (Encore)

Scheme 12

Scheme 12: Rearview Camera Image Display Module Replacement
Scheme 12: Rearview Camera Image Display Module Replacement
CalloutComponent Name
Preliminary Procedure Remove the liftgate center applique. Refer to Liftgate Center Applique Replacement , Liftgate Center Applique Replacement (Encore) .
1Rearview Camera Image Display Module Procedure Disconnect the electrical connector. Depress the tabs and push outward to remove the module from the applique.

Rearview Camera Image Display Module Replacement

Front View Camera Module Calibration

The calibration procedure will start automatically after SPS programming is complete. If calibration does not start automatically or if manual initialization is desired, calibration can be initiated by selecting Frontview Camera Learn in the scantool. During this time the Lane Departure Warning amber indicator will illuminate.

Calibration

The calibration process for the front view camera system is necessary when a front view camera module is replaced by a new one. This process shall not be required when only replacing the windshield and the front view camera module has been mounted again properly. This process shall be completed within 3-5 minutes when the correct driving conditions are met. If conditions are not met correct, the front view camera module shall continuously run the service point calibration until successfully completed. This process shall work across ignition cycles and shall not be required to be re-initialized at start up. If the Lane Departure Warning Switch is pressed during calibration, the indictor will flash momentarily and then stay out - this is normal operation.

To calibrate the front camera, operate the vehicle in the following conditions until the calibration is complete

  1. Clean windshield.
  2. Avoid lane changes.
  3. Maintain vehicle speeds between 56-90 km/h (35-56 MPH).
  4. Ensure the road contains visible references (well defined lane markings, curbs, etc.).

Once the procedure is complete, the amber indicator will turn off. Shortly after the green ready to assist light should turn on as long as all conditions are met for normal operation. The system is then ready to assist.

If Slow to Calibrate

One or more of the following conditions may increase the length of time required to complete the self-calibration procedure

  1. Heavy traffic
  2. Stop and go traffic
  3. Mountain roads
  4. Curves in roadway
  5. Poor contrast lane markings
  6. Botts' Dots type lane markings
  7. Operating the vehicle speed is greater than 90 km/h (56 MPH)
  8. Driving through snow or fog, or driving directly into the sun
  9. Camera not properly installed. Verify it is snapped into tabs and is secure. Refer to «Front View Camera Replacement (Encore)»(/buick/encore/i-2012-2016/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system) .

No Calibration

Conditions that will prevent completion of the self-calibration procedure

  1. Dirty windshield glass or obstruction on windshield
  2. Operating the vehicle with speed less than 56 km/h (35 MPH)
  3. No visible lane markings
  4. Severe weather where lane markings cannot be seen
  5. Camera not properly installed. Verify it is snapped into tabs and is secure. Refer to «Front View Camera Replacement (Encore)»(/buick/encore/i-2012-2016/remont/collisionavoidance/#object-detection-system-and-pedestrian-protection-system) .

Rear Vision Camera System Operation

The rear vision camera system consists of a video camera located at the rear of the vehicle and the navigation radio.

When the transmission is placed into REVERSE, a 12 volt signal is sent to the rear vision camera by the body control module (BCM). This signal indicates to the camera that the vehicle is in reverse and image display is requested. The rear vision camera receives ignition voltage and a constant ground to power the camera. Video signal + and video signal - circuits carry the video image from the rear vision camera to the navigation radio. Additionally, the video signal circuits are shielded to prevent any interference which may lead to a loss of video signal resolution and a degraded video image. The shield is provided a ground path by the rear vision camera.

The following conditions may cause a degraded rear vision camera image

  1. Ice, snow, or mud has built up on the rear vision camera
  2. Dark conditions
  3. Extreme light conditions, such as glare from the sun or the headlights of another vehicle
  4. Damage to the rear of the vehicle
  5. Extreme high temperatures or extreme temperature changes

If a malfunction is detected in the system, Service Rear Vision Camera may be displayed on the navigation radio as an indicator to the customer that a problem exists that requires service.

Object Detection Description and Operation (Rear Park Assist, UD7)

The parking assist system is designed to identify and notify the driver of an object in the vehicle path when reversing at speeds of less than 8 km/h (5 MPH). The distance and location of the object is determined by 4 object sensors located in the rear bumper. The parking assist system will notify the driver using audible beeps through the radio or haptic pulses through the driver's seat. The driver can select between audible or haptic alerts in the vehicle personalization menus. See the user's manual for more detailed information on vehicle personalization.

The parking assist system is made up of the following components

  1. Parking assist control module
  2. Rear object sensors
  3. Parking assist switch
  4. Parking assist indicator
  5. Radio
  6. Safety Alert Seat, if equipped.

Parking Assist Control Module

The parking assist control module provides a reference voltage and a low reference to the 4 object alarm sensors. The parking assist control module receives individual signals from each of the 4 sensors and determines the location and distance of an object based on these inputs. When an object is detected, the parking assist control module will send a data message via serial data to the radio requesting an audible alert.

Object Sensors

The object sensors are located in the rear bumpers of the vehicle. The sensors are used to determine the distance between an object and the bumper. Each sensor emits an ultrasonic frequency which is reflected off any object located in front of or behind the vehicle. These reflections are received by the sensors. The time difference between the emission of the frequency and when the reflection is received is known as sensor echo time, it is used to determine the distance to the object. The sensors report this information to the parking assist control module.

Parking Assist Switch

The parking assist can be activated and deactivated by pressing the parking assist switch. By engaging the reverse gear the parking assist can also be activated. By subsequently pressing the parking assist switch the parking assist can be disabled again.

Parking Assist Indicator

The indicator in the parking assist switch shows the status of the parking assist. If the lamp is ON, the parking assist is activated.

Radio

The radio controls the audible alert for the park assist alert. If the an object is detected the radio will command beeps as an audible alert to the driver.

Safety Alert Seat

The memory seat module controls the haptic alert provided by the seats. If an object is detected, the memory seat module will command pulses to the driver's seat.

Parking Assist Operation

When an object is within the measuring range of the sensor, the ultrasonic pulse is reflected and is received by the sending or a neighboring sensor. The sensor converts this signal into a voltage signal and sends this signal to the parking assist control module. The parking assist control module evaluates the received sensor signals. As soon as an object is within the measuring range, the parking assist control module sends a message via serial data to the radio or seat module to provide an alert signal.

The parking assist system can detect objects greater than 7.6 cm (3 in) wide and 25.4 cm (10 in) tall. The system cannot detect objects below the bumper, underneath the vehicle.

The parking assist can be activated and deactivated by pressing the parking assist switch. When REVERSE gear is selected, park assist is automatically activated. By subsequently pressing the parking assist switch the parking assist can be disabled again.

The parking assist control module carries out a self test and monitors the sensors for electrical and mechanical faults. Monitored is the power supply of each sensor and the sensor signals, which need to alter when the vehicle moves. If this is not the case, the sensor is acoustically blocked or faulty. Mud, ice and snow may cause obstruction of the function of the sensors. The parking assist control module also checks whether the correct type of sensor is installed. If any of these tests fails, a DTC with corresponding symptom is set, the parking assist is deactivated and the parking assist indicator in the instrument panel cluster is activated.

Parking Assist System Driver Information Center Messages

SERVICE PARK ASSIST

The driver information center displays SERVICE PARK ASSIST when the parking assist control module detects a malfunction in the parking assist system and the system is disabled. The driver information center also displays SERVICE PARK ASSIST when a loss of communication occurs with the parking assist control module.

PARK ASSIST OFF

The PARK ASSIST OFF message is displayed in the driver information center when the parking assist system is disabled due to conditions that disable or inhibit the system. The parking assist control module requests the driver information center display PARK ASSIST OFF when it detects that one of the following conditions

  1. The parking assist system is manually disabled using the parking assist switch.
  2. An object is attached to the rear of the vehicle, such as a trailer, bicycle rack, trailer hitch receiver, or tow bar. Also, an object extending beyond a lowered tailgate will disable the system.
  3. The parking assist sensors are covered by snow, mud, dirt, slush, or ice.
  4. The vehicle bumper is damaged.
  5. Excessive paint thickness on a replacement parking assist sensor.
  6. The parking assist sensors are disrupted by vibrations, like those caused by a large nearby vehicle or from heavy equipment such as a jackhammer.

Scheme 13

Scheme 13: Side Blind Alert Block Diagram
Scheme 13: Side Blind Alert Block Diagram
CalloutComponent Name
DASerial Data
HWHard-Wired
DBSerial Data - GMLAN Low Speed
HWHard-Wired
HWHard-Wired
B218RB218R Side Object Sensor Module - Right
B218LB218L Side Object Sensor Module - Left
A11A11 Radio
A9AA9A Outside Rearview Mirror - Driver
A9BA9B Outside Rearview Mirror - Passenger

The side blind zone alert system is a feature that utilizes two side object sensor modules to provide enhanced customer convenience by sensing and reporting to the driver that an object is present in one of the driver's side blind zones. This is communicated to the driver by illuminating an icon on the left or right side view mirror, depending on what side of the vehicle the object is detected. This lane change assist system is radar based system in which the sensors transmit and receives energy that is reflected from external objects and used to determine if that object is an object of interest. Although this system is intended to help drivers avoid lane change crashes, it does not replace driver vision and therefore should be considered a lane change aid.

Side Blind Zone Alert System Components

The side blind zone alert system is made up of the following components

  1. Left side object sensor module
  2. Right side object sensor module
  3. Driver outside rearview mirror
  4. Passenger outside rearview mirror

Side Object Sensor Modules

The side object sensor modules are located on each side of the vehicle behind the rear fascia and are not directly visible from outside the vehicle. The sensors use radar to determine the presence of objects nearby. The left side object sensor is the master that communicates on serial data. There is a private communication network between the left and right sensors. The scan tool is able to communicate only with the left sensor.

When an object is detected in the left side blind zone, the side object sensor module sends a message to the right sensor through serial data. The right sensor then supplies voltage to illuminate the visual indicator on the left side outside rear view mirror. When an object is detected in the right side blind zone, the right side object sensor will supply a voltage to illuminate the visual indicator on the right side outside rear view mirror. Each sensor is supplied B+ and ground.

Outside Rearview Mirrors

The outside rearview mirrors contain an icon that is backlit with high intensity, amber-colored LED's located on the mirror surface. The display brightness adapts to day/night conditions. The side blind zone alert indicator icon in the left or right outside rearview mirror is illuminated if the left or right side object sensor module detects a vehicle in the side blind zone to inform the driver that there is a vehicle driving in the blind zone.

Side Blind Zone Alert Operation

The side blind zone alert system shall detect and report "objects of interest" on either side of the vehicle, within a specified "blind spot" zone. The system is designed to alert the driver, with a visual display placed on the side view mirror, to the presence of objects of interest that may not be visible in the inside rearview mirror and outside rear view mirrors. Although this system is intended to help drivers avoid lane change crashes, it does not replace driver vision and therefore should be considered a lane change aid. Even with the side blind zone alert system, the driver must check carefully for objects outside of the reporting zone before changing lanes. In the event that the system senses a malfunction through its diagnostic routines, the system will be disabled and the driver will be visually notified.

When the vehicle is started, both outside mirror displays will briefly come on to indicate that the system is operating. The warning symbols will vary brightness based on the ambient light conditions. Side blind zone alert is active when the vehicle is out of park or the parking brake is off on manual transmission vehicles. When the system detects a vehicle in the side blind zone while driving forward, 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 as an extra warning not to change lanes.

The system is designed to detect objects of interest as small as a 125cc motorcycle with rider. The detection zone starts at the outside rearview mirror and extends out to 3.5 m (11 ft) at the back corner of the vehicle and 5m (16 ft) behind the vehicle at a height of 0.5 m (1.5 ft) to 2.0 m (6 ft) above the ground. The side blind zone system does not detect stationary objects such as guardrails, posts, curbs, walls, berms, bridges, or parked vehicles.

If the vehicle is towing a trailer or has an object such as a bicycle rack attached to the rear of the vehicle, the side blind zone system may not function properly and the indicators may illuminate intermittently or remain illuminated all the time. The driver information center may display "SIDE DETECTION SYSTEM UNAVAILABLE".

Foul weather may affect the operation of the side blind zone system. Occasional missed alerts can occur under normal circumstances and will increase in wet conditions. The number of missed alerts will increase with increased rainfall or road spray. Heavy rainfall, as well as mud, dirt, snow, ice, or slush build-up on the rear fascia, can completely disable the system. The warning symbols will vary brightness based on the ambient light conditions.

Side Blind Zone Alert Driver Information Center Messages

SIDE BLIND ZONE ALERT OFF

This message indicates that the system has been disabled through the driver information center. Refer to the vehicle owners manual for instructions on how to set personalization options on the driver information center.

SERVICE SIDE DETECTION SYSTEM

This message indicates that the system requires service. When the message is displayed, the indicators may remain illuminated at all times, notifying the driver that the side blind zone system should not be relied upon when changing lanes. Check vehicle for DTCs to determine the cause of this notification.

SIDE DETECTION SYSTEM UNAVAILABLE

This message indicates that the system has been temporarily disabled because the sensor is blocked or can otherwise not accurately detect vehicles or objects. Verify there is no damage to rear fascia or there are any bumper stickers that may interfere with the radar signals. Ask the customer if any of the following circumstances were present when the system became unavailable: towing a trailer, having a bike rack attached, mud, dirt, snow, ice, or slush build-up on the rear fascia, heavy rainfall, or excessive road spray.

Scheme 14

Scheme 14: Rear Cross Traffic Alert Block Diagram
Scheme 14: Rear Cross Traffic Alert Block Diagram
CalloutComponent Name
HWHard-Wired
DASerial Data
DBSerial Data - GMLAN Low Speed
DBSerial Data - GMLAN Low Speed
HWHard-Wired
HWHard-Wired
B218RB218R Side Object Sensor Module - Right
B218LB218L Side Object Sensor Module - Left
A11A11 Radio
K40K40 Seat Memory Control Module
P45LRSeat Haptic Movement Motor - Driver Left Rear
P45RRSeat Haptic Movement Motor - Driver Right Rear

The rear cross traffic alert system is a feature that utilized two side object sensor modules to provide enhanced customer convenience while backing up by sensing and providing warnings to the driver on impending rear cross traffic. The rear cross traffic alert system is designed to detect and track moving objects as small as a 125cc motorcycle with rider within a specified coverage zone behind the vehicle. The system is designed to alert the driver, with a visual display and either an audible sound or a haptic warning, if equipped and enabled, to the presence of moving objects of interest that may cause a collision with the host vehicle. Although the system is intended to assist drivers in backing up, it does not replace driver's vision. The driver is responsible to check carefully for objects outside of the coverage zone (e.g., a fast approaching vehicle) for a safe backing maneuver.

Rear Cross Traffic Alert System Components

The side blind zone alert system is made up of the following components

  1. Left side object sensor module
  2. Right side object sensor module
  3. Visual Display Icons located on the infotainment display screen
  4. Audio system chime
  5. Haptic safety seat (if equipped)

Side Object Sensor Modules

The side object sensor modules are located on each side of the vehicle behind the rear fascia and are not directly visible from outside the vehicle. The sensors use radar to determine the presence of moving objects nearby. The left side object sensor is the master that communicates on serial data. There is a private communication network between the left and right sensors. The scan tool is able to communicate only with the left sensor.

When a moving object is detected in the left rear cross traffic zone while the engine is running and the transmission in reverse, the side object sensor module sends a serial data message to the human interface module and memory seat module to provide alerts. Each sensor is supplied B+ and ground.

Display Icons

The rear cross traffic alert system visual alert display consists of two visual icons, one on each side of the display screen of the rearview camera display, that are used to alert the driver on rear cross traffic from each side of the host vehicle respectively. In addition to visual indicators, the audio system will beep (if enabled) and the haptic safety seat will vibrate (if equipped and enabled). Refer to owner's manual for vehicle customization.

Audio or Haptic Notification

The alert output type can be driver selected to either audio or haptic. The chime location will be left rear for left rear cross traffic alert and right rear for right rear cross traffic alert. The haptic seat system response will be to generate 3 repetitions of haptic vibration in the left rear area of the seat for left cross traffic alert and right rear area of the seat for right cross traffic alert. If there is a problem with the haptic seats, the audio chime will be substituted.

Rear Cross Traffic Alert Operation

The rear cross traffic alert system is designed to detect moving objects of interest as small as a 125cc motorcycle with rider. The detection zone extends approximately 30m (99 ft) from the rear corner of the car and covers an area from behind the vehicle to 125 degrees towards the front at a height of 0.45m (1.5 ft) to 2m (6.5 ft) above ground. The system operates when vehicle speed is 10 kph (6 mph) or less and is designed to detect objects moving at speeds up to 36 kph (22 mph).

When the vehicle is backing up, the side object sensors receive energy that is reflected from external objects and determine if the objects are objects of interest or not. The system may at times detect pedestrians, shopping carts, or similar moving objects. This is normal and should not be considered as a false alert or problem with the system. The rear cross traffic alert system will estimate vehicle travel trajectory and use the information in conjunction with object travel trajectory information to determine if there is a potential collision between the vehicle and the object of interest. The rear cross traffic alert function will only alert on objects of interest that pose a potential collision with the host vehicle. The system is not designed to provide an alert to objects that have no potential collision with vehicle. In addition, the system will not alert to stationary objects such as signs, parked cars, etc.

If the vehicle is towing a trailer or has an object such as a bicycle rack attached to the rear of the vehicle, the rear cross traffic alert system may not function properly.

Foul weather may affect the operation of the rear cross traffic alert system. Occasional missed alerts can occur under normal circumstances and will increase in wet conditions. The number of missed alerts will increase with increased rainfall or road spray. Heavy rainfall, as well as mud, dirt, snow, ice, or slush build-up on the rear fascia, can completely disable the system.

Rear Cross Traffic Alert Driver Information Center Messages

REAR CROSS TRAFFIC ALERT OFF

This message indicates that the system has been disabled through the driver information center. Refer to the vehicle owners manual for instructions on how to set personalization options on the driver information center.

SERVICE SIDE DETECTION SYSTEM

This message indicates that the system requires service. Since the side object sensors are also used for side blind zone alert and/or lane change alert, these feature will also be inoperative. Check vehicle for DTCs to determine the cause of this notification.

SIDE DETECTION SYSTEM TEMPORARILY UNAVAILABLE

This message indicates that the system has been temporarily disabled because the sensors are blocked or can otherwise not accurately detect vehicles or objects. Verify there is no damage to rear fascia or there are any bumper stickers that may interfere with the radar signals. Ask the customer if any of the following circumstances that present when the system became unavailable: mud, dirt, snow, ice, or slush build-up on the rear fascia, heavy rainfall, or excessive road spray.

See also:
• Diagnostic System Check - Vehicle
• Strategy Based Diagnosis
• Diagnostic Procedure Instructions
• Symptom Byte List
• WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE
• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs
• Control Module References
• Diagnostic Repair Verification
• Interior Backlighting Malfunction
• Accessory Switch Replacement (Encore)
• Diagnostic Trouble Code (DTC) List - Vehicle
• Data Communication Schematics (Encore)
• Data Link Communications Description and Operation
• Cruise Control Switch Replacement
• Checking Aftermarket Accessories
• Power Mode Mismatch
• Radio Information Display Malfunction (Monochrome Display)
• Outside Rearview Mirror Glass Replacement
• Quarter Stowage Pocket Door Replacement (Left Side)
• Fastener Caution
• Front Bumper Fascia Replacement (Trax)
• Basecoat/Clearcoat Paint Systems
• Paint Gauges
• Windshield Outside Moisture Sensor Cover Replacement (Encore)
• Liftgate Center Applique Replacement
• DTC B094C
• Object Detection Description and Operation (Rear Park Assist, UD7)
• Front Object Alarm Sensor Housing Replacement