B0960

DTC B0958, B0959, B0960, or B0961

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.



DTC Descriptors
DTC B0958 01
- Parking Aid Rear Sensor 1 (Left Corner) Circuit-Short to Battery

DTC B0958 06
- Parking Aid Rear Sensor 1 (Left Corner) Circuit-Short to Ground or Open

DTC B0958 08
- Parking Aid Rear Sensor 1 (Left Corner) Circuit-Signal Invalid

DTC B0958 21
- Parking Aid Rear Sensor 1 (Left Corner) Circuit-Incorrect Period

DTC B0959 01
- Parking Aid Rear Sensor 2 (Left Middle) Circuit-Short to Battery

DTC B0959 06
- Parking Aid Rear Sensor 2 (Left Middle) Circuit-Short to Ground or Open

DTC B0959 08
- Parking Aid Rear Sensor 2 (Left Middle) Circuit-Signal Invalid

DTC B0959 21
- Parking Aid Rear Sensor 2 (Left Middle) Circuit-Incorrect Period

DTC B0960 01
- Parking Aid Rear Sensor 3 (Right Middle) Circuit-Short to Battery

DTC B0960 06
- Parking Aid Rear Sensor 3 (Right Middle) Circuit-Short to Ground or Open

DTC B0960 08
- Parking Aid Rear Sensor 3 (Right Middle) Circuit-Signal Invalid

DTC B0960 21
- Parking Aid Rear Sensor 3 (Right Middle) Circuit-Incorrect Period

DTC B0961 01
- Parking Aid Rear Sensor 4 (Right Corner) Circuit-Short to Battery

DTC B0961 06
- Parking Aid Rear Sensor 4 (Right Corner) Circuit-Short to Ground or Open

DTC B0961 08
- Parking Aid Rear Sensor 4 (Right Corner) Circuit-Signal Invalid

DTC B0961 21
- Parking Aid Rear Sensor 4 (Right Corner) Circuit-Incorrect Period




Diagnostic Fault Information






Circuit/System Description

The object alarm system monitors how close a vehicle is to an object when backing up in a parking maneuver at speeds less than 8 km/h (5 mph). The distance between a vehicle and an object of interest is monitored by the 4 ultrasonic sensors located in the rear bumpers of the vehicle. The object alarm sensors receive the echo signal reflected off the object while the vehicle is backing up. The object alarm system uses visual displays and audible warnings from the radio speakers to warn the driver of an object of interest within the defined field of view. The visual display comprises of two amber and one red indicators, which illuminate based on the vehicle distance to the object. The object alarm sensor is a three-wire sensor that consists of supply voltage circuit, signal circuit and low reference circuit. Power and ground is provided to the object alarm sensor via the supply voltage circuit and low reference from the object detection alarm module. The typical object alarm sensor signal voltage when the system is active is between 7.2 V-9.2 V.


Conditions for Running the DTC

Ignition voltage is between 9-16 volts.


Conditions for Setting the DTC

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

The object alarm module circuit is short to battery.

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

The object alarm module circuit is short to ground or open.

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

The object alarm module signal circuit is invalid.

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

The object alarm module has an incorrect period.


Action Taken When the DTC Sets

* The object alarm module commands ON the information center telltale red indicator.
* The object alarm module sends a serial data communication message to the instrument panel cluster (IPC) to display SERVICE PARK ASSIST message in the driver information center (DIC), and the chime will sound.



Conditions for Clearing the DTC

* The DTC becomes history when the conditions for setting the DTC are no longer present.
* The history DTC clears after 40 malfunction-free warm-up cycles.



Reference Information
Schematic Reference

Object Detection Schematics ([1][2]Collision Avoidance and Parking Assist Systems)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Object Detection Description and Operation (RPA) (Object Detection Description and Operation (RPA))Object Detection Description and Operation (PIDS) (Object Detection Description and Operation (PIDS))
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning) for Scan Tool Information


Circuit/System Testing

1. Ignition OFF, disconnect the harness connector of the suspect rear object alarm sensor.
2. Test for less than 1.0 ohm of resistance between the low reference circuit terminal 2 and ground.

• If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the rear object alarm module.

3. Ignition ON, with the transmission in reverse, test for 8.2-8.8 volts between the rear object alarm sensor supply voltage circuit terminal 1 and the low reference circuit terminal 2.

• If greater than the specified range, test the supply voltage circuit for a short to voltage. If the circuit tests normal, replace the object alarm module.


• If less than the specified range, test the supply voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the rear object alarm module.

4. Test for 7.2-9.2 volts between the rear object alarm sensor signal circuit terminal 3 and the low reference circuit terminal 2.

• If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear object alarm module.


• If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the rear object alarm module.

5. If all circuits test normal, replace the suspect rear object alarm sensor.



Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Rear Object Sensor Replacement (Rear Object Sensor Replacement)
* Control Module References (Programming and Relearning) for the object alarm module replacement, setup, and programming