Object Detection System Cadillac Escalade GMT900

Fastener Tightening Specifications

Scheme 1

Scheme 2

Scheme 3

Scheme 4

Scheme 5

Scheme 6

DIAGNOSTIC CODE INDEX

DIAGNOSTIC CODE INDEX

Diagnostic Instructions

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/escalade/gmt900-2006-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/escalade/gmt900-2006-2014/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»(/cadillac/escalade/gmt900-2006-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit/System Description

The body control module (BCM) supplies B+ to the rearview camera when the transmission is placed into reverse.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts

Conditions for Setting the DTC

The BCM detects there is a short to ground or an open circuit.

Action Taken When the DTC Sets

Rearview camera is disabled.

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

Electrical Information Reference

1. «Circuit Testing»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the rearview camera.
2. Ignition ON, park brake applied, transmission in REVERSE, test for B+ between the B+ circuit terminal 3 and ground. If less than the specified value, test the B+ circuit for a short to ground or an open/high resistance.
3. If all circuits test normal, replace the BCM.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for BCM replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/escalade/gmt900-2006-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using the diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/escalade/gmt900-2006-2014/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»(/cadillac/escalade/gmt900-2006-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Diagnostic Fault Information

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

1. DTC B1325 is not set
2. Ignition voltage is between 9-16 V
3. Transmission in REVERSE

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

Voltage seen on the object alarm sensor signal circuit is greater than 11.5 V or the object alarm sensor is not grounded.

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

Voltage seen on the object alarm sensor signal circuit is less than 0.5 V.

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

An invalid signal is received by the object alarm module.

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

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

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

The object alarm module determines there is an incorrect sensor installed.

1. The parking assist system is disabled.
2. The object alarm module sends a serial data message to the instrument panel cluster (IPC) to display SERVICE PARK ASSIST message in the driver information center (DIC).

Conditions for Clearing the DTC

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.

Diagnostic Aids

Make sure the object alarm sensors located on the vehicle rear bumper are clear. Remove any snow, mud or ice that is blocking the sensors.

Schematic Reference

Object Detection Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

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

Electrical Information Reference

1. «Circuit Testing»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
3. «Wiring Repairs»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)
4. «Connector Repairs»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Verify that DTC B1405 is not set. If DTC is set, refer to «DTC B1405»(/cadillac/escalade/gmt900-2006-2014/remont/collisionavoidance/#object-detection-system) .
2. Verify that DTC B0958 3A, DTC B0959 3A, DTC B0960 3A, or DTC 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.

Single Object Alarm Sensor DTC Set

1. Ignition OFF, disconnect the harness connector at the appropriate object alarm sensor.
2. Ignition OFF for 30 seconds, test for less than 20 ohms 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 object alarm module.
3. Ignition ON, transmission in REVERSE, test for 8.0-9.0 V between the voltage reference circuit terminal 1 and ground. If greater than the specified range, test the voltage reference circuit for a short to voltage. If the circuit tests normal, replace the object alarm module. If less than the specified range, test the voltage reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the object alarm module.
4. Ignition OFF, remove the malfunctioning object alarm sensor and swap locations with another properly functioning object alarm sensor. Connect the harness connector at both sensors.
5. Ignition ON, verify the DTC is set for the new location in which the malfunctioning object alarm 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 object alarm module.
6. If the DTC sets for the new location in which the malfunctioning object alarm sensor is installed, replace the appropriate object alarm sensor.

Multiple Object Alarm Sensor DTCs Set

1. Ignition OFF, disconnect the harness connector at each of the object alarm sensors.
2. Ignition OFF for 30 seconds, test for less than 20 ohms 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 object alarm module.
3. Ignition ON, transmission in REVERSE, test for 8.0-9.0 V between the voltage reference circuit terminal 1 and ground. If greater than the specified range, test the voltage reference circuit for a short to voltage. If the circuit tests normal, replace the object alarm module. If less than the specified range, test the voltage reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the object alarm module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Rear Object Sensor Replacement»(/cadillac/escalade/gmt900-2006-2014/remont/collisionavoidance/#object-detection-system)
2. «Control Module References»(/cadillac/escalade/gmt900-2006-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for object alarm module replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/escalade/gmt900-2006-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/escalade/gmt900-2006-2014/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»(/cadillac/escalade/gmt900-2006-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The parking assist system can be disabled by pressing the parking assist disable switch. When pressed, the parking assist disable signal circuit is pulled to ground. When the parking assist system is disabled, the object alarm module will ground the parking assist disable indicator control circuit, illuminating the indicator.

1. DTC B1325 is not set
2. Ignition voltage is between 9-16 volts.

The object alarm module has detected that the parking assist disable switch signal circuit is shorted to ground.

1. The parking assist system is disabled.
2. The parking assist disable indicator is not illuminated.
3. The object alarm module sends a serial data message to the instrument panel cluster (IPC) to display SERVICE PARK ASSIST message in the driver information center (DIC).

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.

If the parking aid switch is continuously pressed for greater than 5 seconds the DTC will set.

Schematic Reference

Object Detection Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

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

Electrical Information Reference

1. «Circuit Testing»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/escalade/gmt900-2006-2014/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

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.

1. Ignition OFF, disconnect the harness connector at the I/P multifunction switch.
2. Test for less than 1.0 ohms between the appropriate ground circuit listed below and ground: RPO X88/Z88 ground circuit terminal 3 RPO Z75 ground circuit terminal 5 If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify that the scan tool Park Assist Switch parameter is Inactive. If not the specified value, test the signal circuit terminal 2 for a short to ground. If the circuit tests normal, replace the object alarm module.
4. Ignition OFF, connect a 3A fused jumper wire between signal circuit terminal 2 and ground.
5. Ignition ON, verify that the scan tool Park Assist Switch parameter is Active. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the object alarm module.
6. If all circuits test normal, test or replace the I/P multifunction switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Accessory Switch Replacement (Except Cadillac)»(/cadillac/escalade/gmt900-2006-2014/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges) or «Accessory Switch Replacement (Cadillac)»(/cadillac/escalade/gmt900-2006-2014/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges)
2. «Control Module References»(/cadillac/escalade/gmt900-2006-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for Object Alarm Module replacement, setup, and programming.

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/escalade/gmt900-2006-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/escalade/gmt900-2006-2014/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»(/cadillac/escalade/gmt900-2006-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The parking assist system can be disabled by pressing the parking assist disable switch. When the parking assist system is disabled the object alarm module will ground the parking assist disable indicator control circuit, illuminating the indicator.

1. DTC B1325 is not set
2. Ignition voltage is between 9-16 volts

The object alarm module detects the parking assist disable indicator control circuit is shorted to ground, shorted to voltage or open.

1. The parking assist system is disabled.
2. The object alarm module sends a serial data message to the instrument panel cluster (IPC) to display SERVICE PARK ASSIST message in the driver information center (DIC).

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

Electrical Information Reference

1. «Circuit Testing»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/escalade/gmt900-2006-2014/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

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.

1. Ignition OFF, disconnect the harness connector at the I/P multifunction switch.
2. Ignition ON, verify a test lamp illuminates between the appropriate ignition circuit listed below and ground: RPO X88/Z88 ignition circuit terminal 6 RPO Z75 ignition circuit terminal 4 If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
3. Ignition OFF, connect the harness connector at the I/P multifunction switch. Disconnect the X1 harness connector at the object alarm module.
4. Ignition ON, verify the park assist disable LED is not illuminated. If the LED is illuminated, test the control circuit for a short to ground. If the circuit tests normal, test or replace the I/P multifunction switch.
5. Install a 10A fused jumper wire between the control circuit terminal 3 and ground. Verify that the park assist disable LED is illuminated. If the LED is not illuminated, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, test or replace the I/P multifunction switch.
6. If all circuits test normal, replace the object alarm module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Rear Object Alarm Module Switch Replacement (Escalade)»(/cadillac/escalade/gmt900-2006-2014/remont/collisionavoidance/#object-detection-system) or «Rear Object Alarm Module Switch Replacement (Tahoe/Yukon)»(/cadillac/escalade/gmt900-2006-2014/remont/collisionavoidance/#object-detection-system)
2. «Control Module References»(/cadillac/escalade/gmt900-2006-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for Object Alarm Module replacement, setup, and programming.

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/escalade/gmt900-2006-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/escalade/gmt900-2006-2014/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»(/cadillac/escalade/gmt900-2006-2014/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 object alarm module receives the vehicle identification number (VIN) from the body control module (BCM). The object alarm module will compare the VIN received to the VIN stored in memory.

1. DTC B1325 is not set
2. Ignition voltage is between 9-16 volts

The VIN stored in the object alarm module does not match the received VIN.

1. The parking assist system is disabled.
2. The object alarm module sends a serial data message to the instrument panel cluster (IPC) to display SERVICE PARK ASSIST message in the driver information center (DIC).

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

Electrical Information Reference

1. «Circuit Testing»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/escalade/gmt900-2006-2014/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

Verify that DTC B1015 is not set.

1. If the DTC is set, program the object alarm module. Refer to «Object Alarm Module Programming and Setup»(/cadillac/escalade/gmt900-2006-2014/remont/communication-devices/#programming-and-setup-all-systems__object-alarm-module-programming-and-setup) . If the DTC resets, replace the object alarm module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

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

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/escalade/gmt900-2006-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/escalade/gmt900-2006-2014/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»(/cadillac/escalade/gmt900-2006-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

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.

1. Ignition ON
2. Transmission in REVERSE

B1405 02

The parking assist control module has detected the 8 V reference circuit is shorted to ground.

B1405 03

The parking assist control module has detected the 8 V reference circuit is less than 6.3 V.

B1405 07

The parking assist control module has detected the 8 V reference circuit is greater than 10.4 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

Object Detection Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

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

Electrical Information Reference

1. «Circuit Testing»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/escalade/gmt900-2006-2014/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

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

1. Ignition OFF, disconnect the harness connector at each of the object sensors.
2. Ignition ON, transmission in REVERSE, test for 6.3-10.4 V between the 8 V reference circuit terminal 1 at the rear object sensor harness connector and ground. If less than the specified range, test the 8 V reference circuit for a short to ground. If the circuit tests normal, replace the rear object alarm module. If greater than the specified range, test the 8 V reference circuit for a short to voltage. If the circuit tests normal, replace the rear object alarm module.
3. Install each object alarm sensor harness connector one at a time, checking DTCs after each sensor is connected. Verify DTC B1405 is not set as current. If the DTC is set, replace the object alarm sensor that was connected immediately before the DTC set.
4. If all circuits test normal, replace the rear object alarm module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Rear Object Sensor Replacement»(/cadillac/escalade/gmt900-2006-2014/remont/collisionavoidance/#object-detection-system)
2. «Control Module References»(/cadillac/escalade/gmt900-2006-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) 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 (UFT) or Object Detection Description and Operation (UVC) or Object Detection Description and Operation (UD7) .

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the system. Refer to «Checking Aftermarket Accessories»(/cadillac/escalade/gmt900-2006-2014/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 could cause the symptom.
3. Make sure the object alarm sensors located on the vehicle rear bumper are clear. Remove any snow, mud or ice that is blocking the sensors.
4. Make sure the rear vision camera is clear. Remove any snow, mud or ice that is blocking the rear vision camera.

Intermittent

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

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

1. «Parking Assist System Malfunction»(/cadillac/escalade/gmt900-2006-2014/remont/collisionavoidance/#object-detection-system)
2. «Rear Vision Camera System Malfunction (without Navigational Radio)»(/cadillac/escalade/gmt900-2006-2014/remont/collisionavoidance/#object-detection-system) or «Rear Vision Camera System Malfunction (with Navigational Radio)»(/cadillac/escalade/gmt900-2006-2014/remont/collisionavoidance/#object-detection-system)
3. «Side Object Sensor Malfunction»(/cadillac/escalade/gmt900-2006-2014/remont/collisionavoidance/#object-detection-system)

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/escalade/gmt900-2006-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/escalade/gmt900-2006-2014/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»(/cadillac/escalade/gmt900-2006-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The 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 alarm sensors located in the rear bumper. The parking assist system will notify the driver using an audible signal through the radio speakers.

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 using the parking assist disable switch.
2. Hitch/Object Attached - The object alarm module is detecting an object that is attached to the vehicle or the endgate is lowered, if applicable. Common items such as a hitch receiver, trailer, object hanging out of endgate, 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 object alarm 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 traveling too fast in reverse at speeds of greater than 8 km/h (5 mph).
4. Inhibit - The object alarm 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 object alarm 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 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.

Schematic Reference

Object Detection Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

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

Electrical Information Reference

1. «Circuit Testing»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/escalade/gmt900-2006-2014/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, 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.
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.
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 and the scan tool Park Assist Disable History parameters to determine the cause of the inhibit.

Park Assist Disable Switch Circuit Malfunction

1. Ignition OFF, disconnect the harness connector at the I/P multifunction switch.
2. Test for less than 10 ohms between the appropriate ground circuit terminal listed below and ground. X88/Z88 terminal 3 Z75 terminal 5 If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify the scan tool Park Assist Switch parameter is Inactive. If not the specified value, test the signal circuit terminal 2 for a short to ground. If the circuit tests normal, replace the object alarm module.
4. Install a 3A fused jumper wire between the signal circuit terminal 2 and ground. Verify the scan tool Park Assist Switch parameter is Active. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the object alarm module.
5. If all circuits test normal, test or replace the I/P multifunction switch.

Park Assist Disable LED Circuit Malfunction

1. Ignition OFF, disconnect the harness connector at the I/P multifunction switch.
2. Ignition ON, verify a test lamp illuminates between the appropriate ignition circuit terminal listed below and ground. X88/Z88 terminal 6 Z75 terminal 4 If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
3. Ignition OFF, connect the harness connector at the I/P multifunction switch. Disconnect the X1 harness connector at the object alarm module.
4. Ignition ON, verify the park assist disable LED is not illuminate. If the LED is illuminated, test the control circuit for a short to ground. If the circuit tests normal, test or replace the I/P multifunction switch.
5. Install a 10A fused jumper wire between the control circuit terminal 3 and ground. Verify the park assist disable LED is illuminated. If the LED is not illuminated, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, test or replace the I/P multifunction switch.
6. If all circuits test normal, replace the object alarm module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Accessory Switch Replacement (Except Cadillac)»(/cadillac/escalade/gmt900-2006-2014/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges) or «Accessory Switch Replacement (Cadillac)»(/cadillac/escalade/gmt900-2006-2014/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges)
2. «Control Module References»(/cadillac/escalade/gmt900-2006-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for object alarm module replacement, setup, and programming.

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/escalade/gmt900-2006-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/escalade/gmt900-2006-2014/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»(/cadillac/escalade/gmt900-2006-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

When the transmission is placed into REVERSE while engine is running, a 12 V signal is sent to the inside rearview mirror and rearview camera indicating that camera operation is requested. Ignition voltage and ground are supplied to the rearview camera; the inside rearview mirror is supplied a common ignition voltage and ground source that is shared with other mirror operations. The rearview camera sends video information to the inside rearview mirror 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.

Schematic Reference

Object Detection Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

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

Electrical Information Reference

1. «Circuit Testing»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

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.
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.

Rearview Camera System Always On

1. Ignition OFF, disconnect the harness connector at the rearview camera.
2. Engine running, transmission in PARK, verify a test lamp does not illuminate between the control circuit terminal 3 and ground. If the test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal, refer to «Backup Lamps Malfunction»(/cadillac/escalade/gmt900-2006-2014/remont/exterior-lights/#lighting-system) .
3. If all circuits test normal, test or replace the rearview camera.

Rearview Camera System Does Not Display

1. Ignition OFF, disconnect the harness connector at the rearview camera.
2. Test for less than 10 ohms between the ground circuit terminal 5 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
3. Engine running, verify a test lamp illuminates between the ignition circuit terminal 6 and ground. If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
4. Park brake applied, transmission in REVERSE, engine running, test for B+ between the B+ circuit terminal 3 and ground. If less than the specified value, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
5. Ignition OFF, disconnect the harness connector at the inside rearview mirror.
6. Test for less than 10 ohms between the ground circuit terminal 8 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
7. Park brake applied, transmission in REVERSE, engine running, test for B+ between the control terminal 9 and ground. If less than the specified value, test the control circuit for an open/high resistance. If the circuit tests normal, refer to «Backup Lamps Malfunction»(/cadillac/escalade/gmt900-2006-2014/remont/exterior-lights/#lighting-system) .
8. Engine running, test for less than 1 V between the following signal circuit terminals at the rearview camera harness connector and ground: Signal (+) circuit terminal 1 Signal (-) circuit terminal 4 If greater than the specified range, test the signal circuit for a short to voltage.
9. Test for infinite resistance between the following circuit terminals at the rearview camera harness connector and ground: Signal (+) circuit terminal 1 Signal (-) circuit terminal 4 If not the specified value, test the circuit for a short to ground.
10. Test for less than 2 ohms between the signal (+) circuit terminal 1 at the rearview camera harness connector and the signal (+) circuit terminal 6 at the inside rearview mirror harness connector. If greater than the specified range, test the signal circuit for an open/high resistance.
11. Test for less than 2 ohms between the signal (-) circuit terminal 4 at the rearview camera harness connector and the signal (-) circuit terminal 7 at the inside rearview mirror harness connector. If greater than the specified range, test the signal circuit for an open/high resistance.
12. If all circuits test normal, test or replace the rearview camera.
13. Engine running, transmission in REVERSE, verify a clear rear vision image is displayed on the inside rearview mirror. If a clear rear vision image is not displayed, replace the inside rearview mirror.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Rearview Camera Replacement (Endgate)»(/cadillac/escalade/gmt900-2006-2014/remont/collisionavoidance/#object-detection-system) or «Rearview Camera Replacement (Liftgate)»(/cadillac/escalade/gmt900-2006-2014/remont/collisionavoidance/#object-detection-system__rearview-camera-replacement-liftgate)
2. «Control Module References»(/cadillac/escalade/gmt900-2006-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for inside rearview mirror replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/escalade/gmt900-2006-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/escalade/gmt900-2006-2014/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»(/cadillac/escalade/gmt900-2006-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

When the transmission is placed into REVERSE while engine is running, 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.

Schematic Reference

Object Detection Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

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

Electrical Information Reference

1. «Circuit Testing»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/escalade/gmt900-2006-2014/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. 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.
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.

Rearview Camera System Always On

1. Ignition OFF, disconnect the harness connector at the rearview camera.
2. Ignition ON, vehicle in PARK, verify a test lamp does not illuminate between the control circuit terminal 3 and ground. If the test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal, refer to «Backup Lamps Malfunction»(/cadillac/escalade/gmt900-2006-2014/remont/exterior-lights/#lighting-system) .
3. If all circuits test normal, test or replace the rearview camera.

Rearview Camera System Does Not Display

1. Ignition OFF, disconnect the harness connector at the rearview camera.
2. Test for less than 10 ohms between the ground circuit terminal 5 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
3. Engine running, verify a test lamp illuminates between the ignition circuit terminal 6 and ground. If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
4. Park brake applied, transmission in REVERSE, engine running, test for B+ between the B+ circuit terminal 3 and ground. If less than the specified value, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
5. Ignition OFF, disconnect the X4 harness connector at the radio.
6. Engine running, test for less than 1 V between the following signal circuit terminals at the rearview camera harness connector and ground: Signal (+) circuit terminal 1 Signal (-) circuit terminal 4 If greater than the specified range, test the signal circuit for a short to voltage.
7. Test for infinite resistance between the following circuit terminals at the rearview camera harness connector and ground: Signal (+) circuit terminal 1 Signal (-) circuit terminal 4 If not the specified value, test the circuit for a short to ground.
8. Test for less than 2 ohms between the signal (+) circuit terminal 1 at the rearview camera harness connector and the signal (+) circuit terminal 6 at the radio harness connector If greater than the specified range, test the signal circuit for an open/high resistance.
9. Test for less than 2 ohms between the signal (-) circuit terminal 4 at the rearview camera harness connector and the signal (-) circuit terminal 7 at the radio harness connector. If greater than the specified range, test the signal circuit for an open/high resistance.
10. If all circuits test normal, test or replace the rearview camera.
11. Engine running, transmission in REVERSE, verify a clear rear vision image is displayed on the radio. If a clear rear vision image is not displayed, replace the radio.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Rearview Camera Replacement (Endgate)»(/cadillac/escalade/gmt900-2006-2014/remont/collisionavoidance/#object-detection-system) or «Rearview Camera Replacement (Liftgate)»(/cadillac/escalade/gmt900-2006-2014/remont/collisionavoidance/#object-detection-system__rearview-camera-replacement-liftgate)
2. «Control Module References»(/cadillac/escalade/gmt900-2006-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for radio replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/escalade/gmt900-2006-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/escalade/gmt900-2006-2014/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»(/cadillac/escalade/gmt900-2006-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The Side Blind Zone Alert (SBZA) system uses side object sensors located behind the fascia at each of the vehicle's rear corners. Visual indicators located in the right and left outside rearview mirrors alert the driver to the presence of objects of interest within the corresponding blind spots, or zones, on each side of the vehicle. The system is controlled by the driver information center (DIC) which can also communicate its status.

Each sensor receives battery power, ground, as well as serial data communications. The left and right sensors are identical, however an additional ground circuit is required to configure the sensor for operation on the right side. Communication is via a serial data and each sensor shares the serial data circuit in parallel, allowing continuation of communication between the sensors. The scan tool is able to communicate with each sensor independently. The side object sensors control corresponding mirror icons by sending messages to the door modules which in turn switch power to the LED indicators.

1. The side object sensors are capable of detecting when they are blocked by mud, snow, or ice build up on the fascia. When a sensor is blocked, the driver information center (DIC) will display SIDE BLIND ZONE SYSTEM UNAVAILABLE. The SBZA system transitions back to the normal operating state when the blockage is removed. Bumper sticks, labels, and heavy rain storms may also cause this condition.
2. The SBZA 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.
3. The SBZA 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.
4. The SBZA system is disabled if any of the following occurs: The door modules determine that a malfunction exists in the side object indicator. There is a loss of serial data communication or a SBZA system DTC is set. The SBZA system is manually disabled by the driver through the DIC.
5. Each side object sensor maintains a history buffer of the previous 16 SBZA events which can be accessed using the scan tool. These parameters may be used to help diagnose a system malfunction or an intermittent concern.
6. Because the sensors are identical, they may be swapped from one side of the vehicle to the other in an attempt to isolate a concern. Sensors should NOT be swapped from one vehicle to another.

Schematic Reference

Object Detection Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

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

Electrical Information Reference

1. «Circuit Testing»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/escalade/gmt900-2006-2014/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, verify the scan tool can communicate with right side object sensor. If the scan tool can not communicate with the right side object sensor, refer to Right Side Object Sensor Malfunction
2. Verify the scan tool can communicate with left side object sensor. If the scan tool can not communicate with the left side object sensor, refer to Left Side Object Sensor Malfunction
3. Ignition ON, verify that the 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 indicators do not briefly illuminate during the system self test, the side blind zone alert system has been disabled. Refer to Diagnostic Aids. If only one indicator does not briefly illuminate during the self test, refer to Side Object Indicator Malfunction.

Right Side Object Sensor Malfunction

1. Ignition OFF, disconnect the harness connector at the right side object sensor.
2. Test for less than 5 ohms between the ground circuit terminals listed below and ground: Terminal 5 Terminal 6 If greater than the specified range, test the appropriate ground circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 2 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
4. If all circuits test normal, replace the right side object sensor.

Left Side Object Sensor Malfunction

1. Ignition OFF, disconnect the harness connector at the left side object sensor.
2. Test for less than 5 ohms between the ground circuit terminal 5 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 2 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
4. Ignition OFF, disconnect the harness connector at the right side object sensor.
5. Ignition ON, test for less than 1 V between the serial data circuit terminal 4 and ground. If greater than the specified range, test the serial data circuit for a short to ground.
6. Test for infinite resistance between the serial data circuit terminal 4 and ground. If not the specified value, test the serial data circuit for a short to ground.
7. Test for less than 2 ohms between the serial data circuit terminal 4 at the left side object sensor harness connector and the serial data circuit terminal 4 at the right side object sensor harness connector. If greater than the specified range, test the serial data circuit for an open/high resistance.
8. If all circuits test normal, replace the left side object sensor.

Side Object Indicator Malfunction

1. Ignition OFF, disconnect the X2 harness connector at the outside rearview mirror.
2. Connect a test lamp between the control circuit terminal 4 and the low reference circuit terminal 1.
3. Ignition ON, verify the test lamp briefly illuminates during the system self test. If the test lamp does not illuminate or remains illuminated at all time, test the control circuit and the low reference circuit for a short to voltage, short to ground, or an open/high resistance. If the circuits test normal, replace the appropriate door module.
4. If all circuits test normal, test or replace the appropriate outside rearview mirror.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Power Mirror Replacement»(/cadillac/escalade/gmt900-2006-2014/remont/mirrors/#mirror-system)
2. «Control Module References»(/cadillac/escalade/gmt900-2006-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for the driver door module, front passenger door module, side object sensor replacement, setup, and programming

Scheme 7

Scheme 8

Scheme 9

Scheme 10

Scheme 11

Scheme 12

Removal Procedure

1. Remove rear bumper fascia. Refer to «Rear Bumper Fascia Replacement (All Utility, Cadillac ESV)»(/cadillac/escalade/gmt900-2006-2014/remont/exterior-body-panels/#bumpers-and-fascia) or «Rear Bumper Fascia Replacement (Avalanche, Cadillac EXT)»(/cadillac/escalade/gmt900-2006-2014/remont/exterior-body-panels/#bumpers-and-fascia) .
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»(/cadillac/escalade/gmt900-2006-2014/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»(/cadillac/escalade/gmt900-2006-2014/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 (All Utility, Cadillac ESV)»(/cadillac/escalade/gmt900-2006-2014/remont/exterior-body-panels/#bumpers-and-fascia) or «Rear Bumper Fascia Replacement (Avalanche, Cadillac EXT)»(/cadillac/escalade/gmt900-2006-2014/remont/exterior-body-panels/#bumpers-and-fascia) .

Rear Object Sensor Housing Replacement

1. Remove the rear fascia. Refer to «Rear Bumper Fascia Replacement (All Utility, Cadillac ESV)»(/cadillac/escalade/gmt900-2006-2014/remont/exterior-body-panels/#bumpers-and-fascia) or «Rear Bumper Fascia Replacement (Avalanche, Cadillac EXT)»(/cadillac/escalade/gmt900-2006-2014/remont/exterior-body-panels/#bumpers-and-fascia) .
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 rear fascia. Refer to «Rear Bumper Fascia Replacement (All Utility, Cadillac ESV)»(/cadillac/escalade/gmt900-2006-2014/remont/exterior-body-panels/#bumpers-and-fascia) or «Rear Bumper Fascia Replacement (Avalanche, Cadillac EXT)»(/cadillac/escalade/gmt900-2006-2014/remont/exterior-body-panels/#bumpers-and-fascia) .

Scheme 13

Scheme 14

Rearview Camera Replacement (Liftgate)

The rearview camera is not serviced separately from the rear liftgate applique. Refer to Liftgate Center Applique Replacement (Escalade) or Liftgate Center Applique Replacement (Tahoe, Yukon) or Liftgate Center Applique Replacement (GMC Yukon Hybrid 2 Mode) .

Object Detection Description and Operation (UFT)

The side blind zone alert (SBZA) system is designed to detect vehicles or other objects that may be located in the vehicles blind spots. This detection is performed by two side object sensors, located behind the rear fascia on each side of the vehicle. When an object is detected in a blind spot, an indicator in the outside rearview mirror will illuminate, notifying the driver that it is unsafe to change lanes.

The SBZA system is made up of the following components

1. Left side object sensor
2. Right side object sensor
3. Driver door module
4. Front passenger door module
5. Driver outside rearview mirror
6. Passenger outside rearview mirror

Side Object Sensors

The side object sensors are each located behind the rear fascia, positioned so that the sensor is pointing out toward the opposite lane. Each sensor is supplied B+ and ground. The right sensor receives an additional ground. Both sensors communicate independently on the serial data line. The serial data enters the right sensor in a pass-thru configuration, that connects to the left sensor. The scan tool is able to individually communicate with each sensor.

When a vehicle or object is detected by a side object sensor, a serial data message is sent to the appropriate door module to illuminate the indicator located in the outside rearview mirror.

Door Modules

The driver and passenger door modules receive serial data messages from the side object sensors. When a message is received indicating that a vehicle or object is in the blind spot, the appropriate door module will apply voltage to the indicator located in the outside rearview mirror, illuminating the indicator. The door module provides a continuous low reference circuit for the indicator.

Outside Rearview Mirror

The outside rearview mirrors each contain an indicator that is controlled by the appropriate door module. This indicator is illuminated when a vehicle or object is positioned in the vehicle's blind spot.

Side Blind Zone Alert Operation

When the vehicle is started, the indicators located in the outside rearview mirror will briefly illuminate to indicate that the system is operating. The side object sensors cover a zone of approximately one lane over from both sides of the vehicle, 11 ft. or 3.5 m. This zone starts at each side mirror and goes back approximately 16 ft. (5.0 m). The height of the zone is approximately between 1.5 ft. (0.5 m) and 6 ft. (2.0 m) off the ground. When a vehicle or object is detected in this area, the appropriate indicator will be illuminated, indicating to the driver that it is unsafe to change lanes. If a turn signal is activated while the indicator is illuminated, the indicator will flash as a more urgent warning that a lane change may be unsafe.

Foul weather may affect the operation of the SBZA 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, will completely disable the system.

If the vehicle is towing a trailer or has an object, such as a bicycle rack, attached to the rear of the vehicle, the SBZA system may not function properly and the indicators will remain illuminated at all time.

SIDE BLIND ZONE ALERT SYSTEM OFF

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

SIDE BLIND ZONE SYSTEM UNAVAILABLE

This message indicates that the system has been disabled because the sensor is blocked or can otherwise not accurately detect vehicles or objects. Such instances may be mud, dirt, snow, ice, or slush build-up on the rear fascia, heavy rainfall, or excessive road spray.

SERVICE SIDE BLIND ZONE ALERT SYSTEM

This message indicates that the system requires service. When the message is displayed, the indicators will remain illuminated at all times, notifying the driver that the SBZA system should not be relied upon when changing lanes.

Rear Vision Camera System Operation (without UVB)

The components used in the rear vision camera system are the camera, located at the rear of the vehicle, and the inside rearview mirror, which houses the LCD display.

When the vehicle is placed in REVERSE while engine is running, the body control module (BCM) sends a 12 volt signal to the inside rearview mirror and the rearview camera. This signal indicates that rear vision camera operation is required. Upon receipt of this signal, the mirror will begin the power up cycle for the LCD display and the camera will also power up. The rear vision camera transmits the video signal to the inside rearview mirror through discrete + and - signal circuits. A metallic foil encases the video signal circuits and is tied to a shield ground circuit. This shield is designed to reduce electronic interference which may degrade the video signal and cause a distorted or otherwise degraded image.

If desired, the rear vision camera may be manually disabled. Refer to the navigation system owners manual for instructions on manually disabling and enabling the rear vision camera system. 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 or low temperatures or extreme temperature changes

Rear Vision Camera System Operation (with UVB)

The components used in the rear vision camera system are the camera, located at the rear of the vehicle, and the navigation radio.

When the vehicle is placed in REVERSE while engine is running, the body control module (BCM) sends a 12 volt signal to the rearview camera. This signal indicates that rear vision camera operation is required. Upon receipt of this signal, the camera will begin the power up cycle. A serial data message is also received by the navigation radio indicating the vehicle is in REVERSE. Upon receipt of this message, the navigation radio will also begin a power up cycle for the display. The rear vision camera transmits the video signal to the navigation radio through discrete + and - signal circuits. A metallic foil encases the video signal circuits and is tied to a shield ground circuit. This shield is designed to reduce electronic interference which may degrade the video signal and cause a distorted or otherwise degraded image.

If desired, the rear vision camera may be manually disabled through the navigation system menu. Refer to the navigation system owners manual for instructions on manually disabling and enabling the rear vision camera system. 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 or low 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 (UD7)

The 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 alarm sensors located in the rear bumper. The parking assist system will notify the driver using an audible signal through the radio speakers. The audible signal will vary depending on the distance the object is from the vehicle.

The parking assist system is made up of the following components

1. Object alarm module
2. Object alarm sensors
3. Parking assist disable switch

Object Alarm Module

The object alarm module provides an 8 V reference and a low reference to the four object alarm sensors. The object alarm 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 object alarm 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 object alarm module.

Rear Parking Assist Operation

When the vehicle is first placed into reverse, an audible beep will sound to indicate the system is working.

When backing up at speed of less than 8 km/h (5 mph), the system is constantly monitoring for object of interest located behind the vehicle. 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 or underneath the vehicle. If an object is detected within 2.5 m (8 ft) away from the rear bumper, there will be an audible beep out of the speakers. As the vehicle gets closer to an object, the time between the beeps becomes shorter. If the vehicle stops and there is an object within 2.5 m (8 ft) away from the rear bumper the beeping will stop after 5 seconds. When the distance between the object and the vehicle starts to decrease again the beeping will start again.

If the parking assist system detects a malfunction when the vehicle is placed into reverse there will be no audible beep and a DTC will be stored. The object alarm module will send a serial data message to the instrument panel cluster (IPC) to display the SERVICE PARK ASSIST message on the driver information center (DIC).

SERVICE PARK ASSIST

The driver information center (DIC) displays SERVICE PARK ASSIST when the object alarm 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 object alarm 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 (Chevrolet and GMC)

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.

PARK ASSIST BLOCKED SEE OWNERS MANUAL (Cadillac)

The PARK ASSIST 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.

See also:
• Diagnostic System Check - Vehicle
• Strategy Based Diagnosis
• Diagnostic Procedure Instructions
• Component Connector End Views
• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs
• Diagnostic Repair Verification
• Control Module References
• Accessory Switch Replacement (Except Cadillac)
• Object Alarm Module Programming and Setup
• Checking Aftermarket Accessories
• Backup Lamps Malfunction
• Power Mirror Replacement
• Instrument Panel Accessory Trim Plate Replacement (Cadillac)
• Fastener Caution
• Front Seat Replacement - Bucket (with HP2)
• Rear Upper Garnish Molding Replacement (Avalanche/Escalade EXT)
• Lifting and Jacking the Vehicle
• Rear Bumper Fascia Replacement (All Utility, Cadillac ESV)
• Basecoat/Clearcoat Paint Systems
• Paint Gauges
• Pickup Box Endgate Latch Handle Bezel Replacement (Pickup)
• DTC B0010
• Object Detection Description and Operation (UFT)
• Object Detection Description and Operation (UD7)
• Rearview Camera Replacement (Liftgate)