Volt

DTC B0954, B0955, B0956, or B0957

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.

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

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

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

The condition for setting the DTC is no longer present.

Schematic Reference

Object Detection Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Object Detection Description and Operation : UVC → UD5

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

1. Verify that DTC B1405 is not present.

⇒	If DTC is present, refer to DTC B1405 .

2. Verify that DTC B0954 01, B0955 01, B0956 01 or B0957 01 is not present.

⇒	If DTC is present, check the appropriate sensor for contamination with mud, ice or snow. If no contamination is diagnosed, refer to Circuit/System Testing.

3. Verify that DTC B0954 21, B0955 21, B0956 21 or B0957 21 is not present.

⇒	If DTC is present, check the respective sensor for contamination by mud, ice or snow. If no contamination is diagnosed, replace the sensor.

4. Verify that DTC B0954 3A, B0955 3A, B0956 3A or B0957 3A is not present.

⇒	If DTC is present, replace the respective sensor with a sensor of correct sensor type.

5. Vehicle in Service Mode, transmission in REVERSE, verify the scan tool Parking Assist System Status parameter displays Enabled.

1. Vehicle OFF for 30 s, disconnect the harness connector at the appropriate front object sensor.
2. Test for less than 30 Ω between the low reference circuit terminal 2 and ground.

⇒	If greater than the specified value, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K41 Front and Rear Parking Assist Control Module.

3. Vehicle in Service Mode, activate the park assist, test for 7.5-9.0 V between the 8 V reference circuit terminal 1 and ground.

⇒	If less than the specified range, test the 8 V reference circuit for an open/high resistance. If the circuit tests normal, replace the K41 Front and Rear Parking Assist Control Module.

4. Vehicle OFF, remove the malfunctioning object sensor and swap locations with another properly functioning front object sensor. Connect the harness connector at both sensors.
5. Vehicle in Service Mode, verify the DTC is set for the new location in which the malfunctioning sensor is installed.

⇒	If the DTC does not set for the new location, test the signal circuit terminal 3 for a short to voltage, short to ground, or an open/high resistance. If the circuit tests normal, replace the K41 Front and Rear Parking Assist Control Module.

6. If the DTC sets for the new location in which the malfunctioning sensor is installed, replace the appropriate front object sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.