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Home >> Buick >> 2013 >> Verano L4-2.0L Turbo >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> B Code Charts >> B0961

B0961




DTC B0958, B0959, B0960, or B0961

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC B0958 01
- Parking Aid Rear Sensor Left Corner Circuit Short to Battery

DTC B0958 06
- Parking Aid Rear Sensor Left Corner Circuit Low Voltage/Open

DTC B0958 08
- Parking Aid Rear Sensor Left Corner Circuit Performance - Signal Invalid

DTC B0958 21
- Parking Aid Rear Sensor Left Corner Circuit Incorrect Period

DTC B0958 3A
- Parking Aid Rear Sensor Left Corner Circuit Incorrect Component Installed

DTC B0959 01
- Parking Aid Rear Sensor Left Middle Circuit Short to Battery

DTC B0959 06
- Parking Aid Rear Sensor Left Middle Circuit Low Voltage/Open

DTC B0959 08
- Parking Aid Rear Sensor Left Middle Circuit Performance - Signal Invalid

DTC B0959 21
- Parking Aid Rear Sensor Left Middle Circuit Incorrect Period

DTC B0959 3A
- Parking Aid Rear Sensor Left Middle Circuit Incorrect Component Installed

DTC B0960 01
- Parking Aid Rear Sensor Right Middle Circuit Short to Battery

DTC B0960 06
- Parking Aid Rear Sensor Right Middle Circuit Low Voltage/Open

DTC B0960 08
- Parking Aid Rear Sensor Right Middle Circuit Performance - Signal Invalid

DTC B0960 21
- Parking Aid Rear Sensor Right Middle Circuit Incorrect Period

DTC B0960 3A
- Parking Aid Rear Sensor Right Middle Circuit Incorrect Component Installed

DTC B0961 01
- Parking Aid Rear Sensor Right Corner Circuit Short to Battery

DTC B0961 06
- Parking Aid Rear Sensor Right Corner Circuit Low Voltage/Open

DTC B0961 08
- Parking Aid Rear Sensor Right Corner Circuit Performance - Signal Invalid

DTC B0961 21
- Parking Aid Rear Sensor Right Corner Circuit Incorrect Period

DTC B0961 3A
- Parking Aid Rear Sensor Right Corner Circuit Incorrect Component Installed

Diagnostic Fault Information






Circuit/System Description

The object sensors are 3-wire sensors that are used to determine the distance between the vehicle and an object of interest. The 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 Parking Assist Control Module triggers the sensors in a sequential loop. After each sensor transmits, the Parking Assist Control Module uses the sensor echo received through the signal circuit to calculate the distance and position of an object.

Conditions for Running the DTC

* Ignition ON, engine running.

* The parking assist is activated. The activation takes place through putting the vehicle in reverse.

Conditions for Setting the DTC

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

The 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 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 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 Parking Assist Control Module determines the wrong sensor type is installed.

Action Taken When the DTC Sets

* The parking assist is disabled.

* The driver information center displays SERVICE PARK ASSIST.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

Diagnostic Aids

For symptom byte 21 the module only runs diagnostic when the vehicle is driven greater than 40 km/h (25 MPH). Therefore, even with clean sensor with no obstruction (i.e snow or ice melted off) drive the vehicle greater than 40 km/h (25 MPH).

The following is a list of reasons this failure type byte 21 might have set:

* One or more of the sensors may be blocked by snow, mud, ice or debris. This might happen after going through a car wash in cold weather.

* Silicone insulator surrounding sensor maybe missing, cut or twisted.

* Improperly installed sensor, sensor maybe be crooked due to a tight wire harness.

* One or more of the sensors may be scratched or the paint maybe 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.

Reference Information

Schematic Reference

Object Detection Schematics [1][2]Collision Avoidance and Parking Assist Systems

Connector End View Reference

Component Connector End Views Outside Rearview Mirror - Driver

Description and Operation

Object Detection Description and Operation (with rearview camera UVC) Object Detection Description and Operation (with rearview camera UVC)Object Detection Description and Operation (with side blind spot alert UFT) Object Detection Description and Operation (with side blind spot alert UFT)Object Detection Description and Operation (with parking assist UD7) Object Detection Description and Operation (with parking assist UD7)

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON.

2. Verify that DTC B1405 is not set.

• If the DTC is set
Refer to DTC B1405 Object Detection

• 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

1. Check the B78 Rear Object Sensor for contamination with snow, mud, dirt, slush, or ice.

• If contaminated, clean sensor.

• If there is no contamination

2. 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.

5. Ignition ON, engine running, 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 Rear Object Sensor. It may take up to 2 minutes 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

1. Ignition OFF, disconnect the harness connector X2 at the K41R Rear Parking Assist Control Module.

2. 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 K41R 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

1. Ignition OFF, disconnect the harness connector at the K41R Rear Parking Assist Control Module.

2. 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

3. 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 K41R Rear Parking Assist Control Module.

• If greater than 9.5 V

1. Ignition OFF, disconnect the 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 and ground.

• If 1 V or greater, repair the short to voltage on the circuit.

• If less than 1 V, replace the K41R Rear Parking Assist Control Module.

• If between 7.5-9.5 V

5. Test for 7.5-9.5 V between the signal circuit terminal 3 and ground.

• If less than 7.5 V

1. Ignition OFF, disconnect the harness connector at the K41R Rear Parking Assist Control Module.

2. 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

3. 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 K41R Rear Parking Assist Control Module.

• If greater than 9.5 V

1. Ignition OFF, disconnect the harness connector at the K41R Rear Parking Assist Control Module, ignition ON.

2. 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, replace the K41R Rear Parking Assist Control Module.

• If between 7.5-9.5 V

6. Test or replace the B78 Rear Object Sensor.

Repair Instructions

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

* Rear Parking Assist Alarm Sensor Replacement Service and Repair

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

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