Object Detection System: Other GMC Cab & Chassis Sierra 3500 HD

Conditions for Clearing

1. The DTC will transition to history when the fault is no longer present.
2. A history DTC will clear after 100 malfunction-free ignition cycles.

Reference Information

Schematic Reference

Object Detection Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Object Detection Description and Operation (UVC) or Object Detection Description and Operation (UD7)

Electrical Information Reference

1. «Circuit Testing»(ref-363328-S03465430942010062100000)
2. «Connector Repairs»(ref-363328-S07759933362010062100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-363328-S38083157932010062100000)
4. «Wiring Repairs»(ref-363328-S24048530182010062100000)

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for BCM replacement, setup, and programming

Circuit/System Verification

1. Verify that DTC B1405 is not set. If DTC is set, refer to «DTC B1405»(ref-363290-S32286146442010062100000) .
2. Verify that DTC B0958 3A, B0959 3A, B0960 3A, or B0961 3A is not set. If DTC is set, replace the appropriate object alarm sensor.
3. Transmission in REVERSE, verify the parking assist system is enabled and one audible beep sounds.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Rear Object Sensor Replacement»(ref-363290-S00048390822010062100000)
2. «Control Module References»(ref-363329-S21853770742010062100000) for object alarm module replacement, setup, and programming

1. The DTC will transition to history when the fault is no longer present.
2. A history DTC will clear after 100 malfunction-free ignition cycles.

Schematic Reference

Object Detection Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Object Detection Description and Operation (UVC) or Object Detection Description and Operation (UD7)

Electrical Information Reference

1. «Circuit Testing»(ref-363328-S03465430942010062100000)
2. «Connector Repairs»(ref-363328-S07759933362010062100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-363328-S38083157932010062100000)
4. «Wiring Repairs»(ref-363328-S24048530182010062100000)

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, observe the scan tool Park Assist Switch parameter while cycling the parking assist disable switch. The parameter should change between Active and Inactive.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Accessory Switch Replacement (with RPO SLT)»(ref-363304-S27333094112010062100000) or «Accessory Switch Replacement (without RPO SLT)»(ref-363304-S20402714922010062100000)
2. «Control Module References»(ref-363329-S21853770742010062100000) for Object Alarm Module replacement, setup, and programming.

1. The DTC will transition to history when the fault is no longer present.
2. A history DTC will clear after 100 malfunction-free ignition cycles.

Schematic Reference

Object Detection Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Object Detection Description and Operation (UVC) or Object Detection Description and Operation (UD7)

Electrical Information Reference

1. «Circuit Testing»(ref-363328-S03465430942010062100000)
2. «Connector Repairs»(ref-363328-S07759933362010062100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-363328-S38083157932010062100000)
4. «Wiring Repairs»(ref-363328-S24048530182010062100000)

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, observe the scan tool Park Assist Switch LED parameter while pressing and releasing the park assist disable switch. The parameter should change between On and Off.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Accessory Switch Replacement (with RPO SLT)»(ref-363304-S27333094112010062100000) or «Accessory Switch Replacement (without RPO SLT)»(ref-363304-S20402714922010062100000)
2. «Control Module References»(ref-363329-S21853770742010062100000) for object alarm module replacement, setup, and programming

1. The DTC will transition to history when the fault is no longer present.
2. A history DTC will clear after 100 malfunction-free ignition cycles.

Schematic Reference

Object Detection Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Object Detection Description and Operation (UVC) or Object Detection Description and Operation (UD7)

Electrical Information Reference

1. «Circuit Testing»(ref-363328-S03465430942010062100000)
2. «Connector Repairs»(ref-363328-S07759933362010062100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-363328-S38083157932010062100000)
4. «Wiring Repairs»(ref-363328-S24048530182010062100000)

Scan Tool Reference

Control Module References for scan tool information

Verify that DTC B1015 is not set.

1. If the DTC is set, program the rear object sensor control module. If the DTC resets, replace the rear object sensor control module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for Object Alarm Module replacement, setup, and programming.

Ignition ON, transmission in REVERSE, observe the scan tool Sensor Feed Voltage Output parameter. The reading should be between 6.3-10.4 V.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Rear Object Sensor Replacement»(ref-363290-S00048390822010062100000)
2. «Control Module References»(ref-363329-S21853770742010062100000) for rear object alarm module replacement, setup and programming

Symptoms - Object Detection

Note. Review the system operation in order to familiarize yourself with the system functions. Refer to Object Detection Description and Operation (UVC) or Object Detection Description and Operation (UD7) .

Intermittent

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

Schematic Reference

Object Detection Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Object Detection Description and Operation (UVC) or Object Detection Description and Operation (UD7)

Electrical Information Reference

1. «Circuit Testing»(ref-363328-S03465430942010062100000)
2. «Connector Repairs»(ref-363328-S07759933362010062100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-363328-S38083157932010062100000)
4. «Wiring Repairs»(ref-363328-S24048530182010062100000)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON, verify the parking assist system is enabled through the DIC. If the parking assist system is manually disabled, enable the system. Refer to the vehicle owners manual for instructions on enabling the system.
2. Observe the scan tool Park Assist Switch parameter while pressing and releasing the park assist disable switch. The parameter should change between Active and Inactive. If the parameter does not cycle between the specified values, refer to Park Assist Disable Switch Circuit Malfunction below.
3. Observe the scan tool Park Assist Switch LED parameter while pressing and releasing the park assist disable switch. The parameter should change between On and Off. If the parameter does not cycle between the specified values, refer to Park Assist Disable LED Circuit Malfunction below.
4. Transmission in REVERSE, verify one audible beep sounds and the scan tool Park Assist System Status parameter is 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 in this test procedure and the scan tool Park Assist Disable History parameters to determine the cause of the inhibit.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Accessory Switch Replacement (with RPO SLT)»(ref-363304-S27333094112010062100000) or «Accessory Switch Replacement (without RPO SLT)»(ref-363304-S20402714922010062100000)
2. «Control Module References»(ref-363329-S21853770742010062100000) for Object Alarm Module replacement, setup, and programming.

Schematic Reference

Object Detection Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Object Detection Description and Operation (UVC) or Object Detection Description and Operation (UD7)

Electrical Information Reference

1. «Circuit Testing»(ref-363328-S03465430942010062100000)
2. «Connector Repairs»(ref-363328-S07759933362010062100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-363328-S38083157932010062100000)
4. «Wiring Repairs»(ref-363328-S24048530182010062100000)

Scan Tool Reference

Control Module References for scan tool information

1. Inspect the rearview camera and verify there is no debris on the lens and that the bezel or bezel seal is not damaged. If debris is found on the lens, clean the lens. If the lens, bezel, or bezel seal are damaged, replace as necessary.
2. Engine running, vehicle in PARK, verify the backup lamps are off. If the backup lamps are illuminated, refer to Rearview Camera System Always On below .
3. Vehicle in REVERSE, engine running, verify a clear rear vision image is displayed on the radio. If a clear image is not displayed, refer to Rearview Camera System Does Not Display below.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Rearview Camera Replacement»(ref-363290-S09201538682010062100000)
2. «Control Module References»(ref-363329-S21853770742010062100000) for radio replacement, setup, and programming

Schematic Reference

Object Detection Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Object Detection Description and Operation (UVC) or Object Detection Description and Operation (UD7)

Electrical Information Reference

1. «Circuit Testing»(ref-363328-S03465430942010062100000)
2. «Connector Repairs»(ref-363328-S07759933362010062100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-363328-S38083157932010062100000)
4. «Wiring Repairs»(ref-363328-S24048530182010062100000)

Scan Tool Reference

Control Module References for scan tool information

1. Inspect the rearview camera and verify there is no debris on the lens and that the bezel or bezel seal is not damaged. If debris is found on the lens, clean the lens. If the lens, bezel, or bezel seal are damaged, replace as necessary.
2. Engine running, vehicle in PARK, verify the backup lamps are off. If the backup lamps are illuminated, refer to Rearview Camera System Always On below.
3. Vehicle in REVERSE, engine running, verify a clear rear vision image is displayed on the radio. If a clear image is not displayed, refer to Rearview Camera System Does Not Display below.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Rearview Camera Replacement»(ref-363290-S09201538682010062100000)
2. «Control Module References»(ref-363329-S21853770742010062100000) for radio replacement, setup, and programming

Schematic Reference

Object Detection Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Object Detection Description and Operation (UVC) or Object Detection Description and Operation (UD7)

Electrical Information Reference

1. «Circuit Testing»(ref-363328-S03465430942010062100000)
2. «Connector Repairs»(ref-363328-S07759933362010062100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-363328-S38083157932010062100000)
4. «Wiring Repairs»(ref-363328-S24048530182010062100000)

1. Inspect the rearview camera and verify there are no debris on the lens and that the bezel or bezel seal is not damaged. If debris are found on the lens, clean the lens. If the lens, bezel, or bezel seal are damaged, replace as necessary.
2. Engine running, vehicle in PARK, verify the backup lamps are off. If the backup lamps are illuminated, refer to Rearview Camera System Always On below.
3. Park brake applied, transmission in REVERSE, engine running, verify a clear rear vision image is displayed on the inside rearview mirror. If a clear image is not displayed, refer to Rearview Camera System Does Not Display below.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Rearview Camera Replacement»(ref-363290-S09201538682010062100000)
2. «Control Module References»(ref-363329-S21853770742010062100000) for inside rearview mirror replacement, setup, and programming

Schematic Reference

Object Detection Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Object Detection Description and Operation (UVC) or Object Detection Description and Operation (UD7)

Electrical Information Reference

1. «Circuit Testing»(ref-363328-S03465430942010062100000)
2. «Connector Repairs»(ref-363328-S07759933362010062100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-363328-S38083157932010062100000)
4. «Wiring Repairs»(ref-363328-S24048530182010062100000)

1. Inspect the rearview camera and verify there are no debris on the lens and that the bezel or bezel seal is not damaged. If debris are found on the lens, clean the lens. If the lens, bezel, or bezel seal are damaged, replace as necessary.
2. Engine running, vehicle in PARK, verify the backup lamps are off. If the backup lamps are illuminated, refer to Rearview Camera System Always On below.
3. Park brake applied, transmission in REVERSE, engine running, verify a clear rear vision image is displayed on the inside rearview mirror. If a clear image is not displayed, refer to Rearview Camera System Does Not Display below.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Rearview Camera Replacement»(ref-363290-S09201538682010062100000)
2. «Control Module References»(ref-363329-S21853770742010062100000) for inside rearview mirror replacement, setup, and programming

Scheme 8

Scheme 9

Rear Object Sensor Control Module

The rear object sensor control module provides an 8 V reference and a low reference to the four object alarm sensors. The rear object sensor control module receives individual signals from each of the four sensors and determines the location and distance of an object based on these inputs. When an object is detected, the rear object sensor control module will send a serial data message to the radio requesting an audible alert.

Object Alarm Sensor

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

SERVICE PARK ASSIST

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

PARK ASSIST OFF

The PARK ASSIST OFF message is displayed in the DIC when the parking assist system is disabled manually using the parking assist disable switch.

PARK ASST BLOCKED SEE OWNERS MANUAL

The PARK ASST BLOCKED SEE OWNERS MANUAL message is displayed in the DIC when the parking assist system is disabled due to conditions that disable or inhibit the system.