Rear Parking Assist System Cadillac Escalade GMT800

Fastener Tightening Specifications

Fastener Tightening Specifications

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Diagnostic Starting Point - Ultrasonic Rear Parking Assist

Begin the system diagnosis by reviewing the system Description and Operation. Reviewing the Description and Operation information will help you determine the correct symptom diagnostic procedure when a malfunction exists. Reviewing the Description and Operation information will also help you determine if the condition described by the customer is normal operation. Refer to SYMPTOMS - ULTRASONIC REAR PARKING ASSIST in order to identify the correct procedure for diagnosing the system and where the procedure is located.

Diagnostic Trouble Code (DTC) Displaying

This vehicle is equipped with an on-board diagnostic display feature capable of displaying diagnostic trouble codes using the 3 indicators on the rear parking assist display. After the bulb check has been completed, the red outside indicator flashes to indicate a malfunction with the system. The module disables operation of the URPA system under this condition.

In order to enter the diagnostic mode, complete the following actions

1. Short the rear parking assist diagnostic connector to ground while the vehicle is in PARK.
2. Turn the ignition ON.
3. Place foot on the brake.
4. Shift the vehicle into REVERSE within 5 seconds.

If the vehicle is not shifted into reverse within 5 seconds after turning the ignition ON, the diagnostic mode will still be initiated. However, a reverse input wiring fault will be registered as sequence #7 as shown in the Diagnostic Indicator table below. Refer to DIAGNOSTIC TROUBLE CODE (DTC) CLEARING for the specific steps on how to clear diagnostic trouble codes. After the reverse input wiring code is cleared, repeat the diagnostic trouble code displaying steps in order to enter the diagnostic mode.

When the diagnostic mode is first entered, the rear parking assist display displays the amber outside indicator and the red outside indicator. Then, the indicators on the rear parking assist display will display one or more of the sequences in the table below to indicate where the fault exists within the rear parking assist system. Refer to DIAGNOSTIC TROUBLE CODE (DTC) CLEARING for the specific steps on how to clear diagnostic trouble codes.

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Diagnostic Trouble Code (DTC) Clearing

The rear parking assist diagnostic sequences may be cleared in one of the following ways

Vehicle Moving

Important: The sequences will not clear if the rear parking assist diagnostic connector is grounded.

1. Drive the vehicle forward at least 24km/h (15mph).2.
2. Stop the vehicle.
3. Turn the ignition OFF.

Vehicle Stopped

Important: The sequences will not clear if the rear parking assist diagnostic connector is grounded.

1. Turn the ignition ON.
2. Place your foot on the brake.
3. Shift the vehicle into REVERSE within 5 seconds.
4. Turn the ignition OFF.

Symptoms - Ultrasonic Rear Parking Assist

Important: Review the system operation in order to familiarize yourself with the system functions. Refer to REAR PARKING ASSIST DESCRIPTION AND OPERATION .

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the system. Refer to CHECKING AFTERMARKET ACCESSORIES in Wiring Systems.
2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
3. Make sure the rear parking assist sensors located on the vehicle rear bumper are clear. Remove any snow, mud or ice that is blocking the sensors.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS in Wiring Systems.

Symptom List

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

1. «REAR PARKING ASSIST MALFUNCTION»(/cadillac/escalade/gmt800-2001-2006/remont/collisionavoidance/#rear-parking-assist-system)
2. «REAR PARKING ASSIST INOPERATIVE - RED INDICATOR FLASHES»(/cadillac/escalade/gmt800-2001-2006/remont/collisionavoidance/#rear-parking-assist-system)

Diagnostic Aids

Before performing this procedure, ensure that the following conditions are met

1. The vehicle park brake is SET.
2. The rear parking assist (RPA) disable switch is ON.

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Before performing this procedure, ensure that the following conditions are met

1. The vehicle park brake is SET.
2. The rear parking assist (RPA) disable switch is ON.

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Removal Procedure

1. Remove the dash trim bezel. Refer to BEZEL REPLACEMENT - INSTRUMENT PANEL (I/P) CLUSTER in Instrument Panel, Gages and Console.
2. Grasp the buttons assembly (2) housing and pull outwards.
3. Disconnect the electrical connector from the rear object alarm module switch.
4. Remove the switch (1) from the housing (2).

Installation Procedure

1. Install the rear object alarm switch into the housing (2).
2. Connect the electrical connector to the switch (1).
3. Install the switch housing into the dash.
4. Install the dash trim bezel. Refer to BEZEL REPLACEMENT - INSTRUMENT PANEL (UP) CLUSTER in Instrument Panel, Gages and Console.

1. Remove the rear quarter garnish molding. Refer to GARNISH MOLDING REPLACEMENT - REAR CORNER in Interior Trim.
2. Disconnect the electrical connector.
3. Remove the retaining screws (1).

1. Install the information center telltale assembly to the garnish molding.
2. Install the retaining screws (1). NOTE: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems. Tighten Tighten the retaining screws to 2 N-m (18 Ib in).
3. Install the rear quarter garnish molding. Refer to GARNISH MOLDING REPLACEMENT - REAR CORNER in Interior Trim.

1. Remove the rear upper garnish molding. Refer to GARNISH MOLDING REPLACEMENT - REAR UPPER (AVALANCHE / ESCALADE EXT) or GARNISH MOLDING REPLACEMENT - REAR UPPER (TAHOE / YUKON / ESCALADE / SUBURBAN) in Interior Trim.
2. Remove the 2 screws (1) retaining the information telltale.
3. Remove the information telltale from the garnish molding.

1. Install the information telltale to the garnish molding.
2. Install the 2 retaining screws (1). NOTE: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems. Tighten Tighten the 2 screws to 2 N.m (18 lb in).
3. Install the garnish molding. Refer to GARNISH MOLDING REPLACEMENT - REAR UPPER (AVALANCHE / ESCALADE EXT) or GARNISH MOLDING REPLACEMENT - REAR UPPER (TAHOE / YUKON / ESCALADE / SUBURBAN) in Interior Trim.

1. Disconnect the electrical connectors to the rear object sensor.
2. Lift the locking tabs on the housing (4) and remove the rear object sensor (1).
3. Insert a small size screw driver at (3) to release the tabs in order to remove the spring (1).
4. From the inside of the housing push in the tabs and remove.
5. Remove the bezel by pushing it through the fascia.

Important: Do not refinish previously painted sensors. Excess paint build up will cause the sensor to be inoperative.

1. Paint the new rear object sensor.
2. Check to make sure the paint does not exceed 6 mils. Use a paint thickness gauge suitable for non-ferrous metals.
3. Paint the sensor bezel to match the color of the bumper fascia.
4. Align the keyhole (2) with the key (1) and press the sensor bezel into the fascia.
5. Install the housing to the bezel through the back side of the fascia. The housing snaps into the cutouts on the bezel. Important: The spring keys must be on the top and bottom of the housing.
6. Install the spring (1) to the housing (2) until fully seated. Ensure the sensor is held to the bumper fascia firmly.
7. Install the decoupling ring (2) to the sensor (1).
8. Insert the sensor into the housing (4) with the connector pointing toward the passenger side of the fascia. The sensor tabs snap into the cutouts on the housing (4).
9. Connect the electrical connectors.

1. Lift the right rear seating surface up to gain access to the rear parking aid module.
2. Disconnect the electrical connector from the module.
3. Remove the module retainer.
4. Remove the module from the seat frame.

1. Install the module to the seat frame. NOTE: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems. Tighten Tighten the module retainer to 1.7 N.m (15 lb in).
2. Connect the electrical connector.
3. Lower the seating surface.

1. Lift the left rear seat up to gain access to the electronic suspension control module and rear object alarm module container.
2. Remove the cover retainers from the seat frame and discard if damaged.
3. Slide the container assembly from underneath the seat frame.
4. Lift the cover off (1) by pushing in where the tabs on the cover locks.
5. Disconnect the electrical connector (1) from the rear object alarm module (2).
6. Push away the tabs from the module in order to lift the module out.
7. Remove the module (2) from the container.

1. Install the module in the container by pushing on the module until it locks in place.
2. Connect the wire connector to the alarm module (1).
3. Installed the cover (1) by pushing on it until it locks in place.
4. Slid the container under the rear seat frame.
5. Install a new cover retainers to the seat frame.
6. Set the rear seat to its original position.

Rear Parking Assist Description and Operation

The ultrasonic rear parking assist (URPA) can help a driver determine how close an object is to the rear bumper within a defined rearward field of view.

The rear parking assist display is located inside to the rear of the vehicle. The display has 3 indicators that can be seen through the rearview mirror or by turning around when seated in the driver seat.

The URPA is equipped with a switch located above the driver information center (DIC) that can be used to disable the system. Refer to THE COMPONENT LOCATOR for the specific location of a component.

When the ignition is ON and the vehicle is placed into reverse, the URPA performs a bulb check. During the bulb check, the 3 indicators on the display illuminate for approximately 2 seconds to indicate that the system is working. The URPA performs a bulb check and operates when the following conditions are present

1. The ignition is ON.
2. The vehicle is placed in REVERSE (R).
3. The vehicle speed is less than 5 km/h (3 mph).

At speeds greater than 5 km/h (3 mph), the URPA is disabled. The red indicator flashes to warn the driver that the system is disabled.

The URPA senses how close the vehicle is to an object. The distance is determined by the four ultrasonic sensors located on the rear bumper. When the system detects an object, one of the following will occur

1. If the object is less than 0.5 m (20 in) away from the rear of the vehicle, the amber outside, amber middle and the red outside indicators flash and the chime sounds continuously.
2. If the object is 0.5-1.0 m (20-40 in) away from the rear of the vehicle, the amber outside and the amber middle indicators flash and the chime sounds one time on the first detection of an object.
3. If the object is 1.0-1.5 m (40 in-5 ft) away from the rear of the vehicle, the amber outside indicator flashes and the chime sounds one time on the first detection of an object.

The URPA can detect objects that are at least 7.6 cm (3 in) and wide and at least 25.4 cm (10 in) tall. It cannot detect objects above the level of the roof.

If the URPA system is not functioning properly, the display flashes the red indicator after the displays test, indicating that there is a problem and the on-board diagnostics need to be entered. Refer to DIAGNOSTIC TROUBLE CODE (DTC) DISPLAYING .

See also:
• SYMPTOMS - ULTRASONIC REAR PARKING ASSIST
• DIAGNOSTIC TROUBLE CODE (DTC) CLEARING
• REAR PARKING ASSIST DESCRIPTION AND OPERATION
• REAR PARKING ASSIST MALFUNCTION
• DIAGNOSTIC TROUBLE CODE (DTC) DISPLAYING