Body Rear End Cadillac STS I

Fastener Tightening Specifications

Fastener Tightening Specifications

Scheme 1

Scheme 2

Rear Compartment Lid Release Actuator Connector End Connector Part Information OEM: 12045813 Service: 12101889 4-Way F Metri-Pack 150 Series (NA) Terminal Part Information Terminal: Terminal Seal: Release Tool: Core Crimp: Insulation Crimp: Test Probe: Pin Wire Color Circuit No. Function A TN/WH 56 Trunk Release Motor Supply Voltage B BK 850 Ground C OG/BK 744 Trunk Ajar Switch Signal D - - Not Used

Rear Compartment Lid Release Switch-Interior Connector End View

Valet Switch Connector End Connector Part Information OEM: 12064868 Service: 15306065 2-Way M Metri-Pack 150 Series (WH) Terminal Part Information Terminal: Terminal Seal: Release Tool: Core Crimp: Insulation Crimp: Test Probe: Pin Wire Color Circuit No. Function A RD/WH 3640 Battery Positive Voltage B BK 253 Trunk Release Relay Control

Begin the system diagnosis with the Diagnostic System Check - Vehicle in Vehicle DTC Information. The Diagnostic System Check will provide the following information

1. The identification of the control modules which command the system
2. The ability of the control modules to communicate through the serial data circuit
3. The identification of any stored diagnostic trouble codes (DTCs) and their status

The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.

Scan Tool Output Controls

Scan Tool Output Controls

Scan Tool Data List

Rear Integration Module (RIM) Data List

Instrument Panel Module (IPM) Data List

Circuit Description

The trunk release switch provides a ground input to the rear integration module (RIM) when the switch is closed. This input allows the RIM to detect when a key release switch request is received.

DTC Descriptor

This diagnostic procedure supports the following DTC

DTC B2732 Open or Short to Ground or Power in Liftgate Signal Circuit.

Conditions for Running the DTC

The RIM detects a fault on the circuit for more than 60 seconds.

Action Taken When the DTC Sets

The RIM stores DTC B2732 in memory.

Conditions for Clearing the DTC

1. The RIM no longer detects a fault on the signal circuit for the liftgate release switch.
2. A history DTC will clear after 100 consecutive ignition cycles if the malfunction no longer exists.
3. A scan tool can be used to clear history and current DTCs.

Diagnostic Aids

The cause of the malfunction could be intermittent. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

DTC B2732

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/sts/i-2004-2007/remont/oem-general-information/#vehicle-dtc-information) before using the Symptom Tables in order to verify that all of the following are true: There are no DTCs set. The control module(s) can communicate via the serial data link.
2. Review the system operation in order to familiarize yourself with the system functions. Refer to «Luggage Compartment Description and Operation»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-rear-end) .

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the rear compartment lid release. Refer to «Checking Aftermarket Accessories»(/cadillac/sts/i-2004-2007/remont/body-electrical/#wiring-systems-electrical-power-management-introduction__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.

Intermittent

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

Symptom List

1. «Trunk Release Inoperative (Interior Release Inoperative )»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-rear-end__trunk-release-inoperative-interior-release-inoperative) or «Trunk Release Inoperative (Exterior Release Inoperative)»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-rear-end__trunk-release-inoperative-exterior-release-inoperative)
2. «Trunk Ajar Indicator Always On»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-rear-end__trunk-ajar-indicator-always-on)
3. «Trunk Ajar Indicator Inoperative»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-rear-end__trunk-ajar-indicator-inoperative)

Trunk Release Inoperative (Interior Release Inoperative )

Interior Release for Rear Compartment Lid Inoperative

Trunk Release Inoperative (Exterior Release Inoperative)

Exterior Release for Rear Compartment Lid Inoperative

Trunk Ajar Indicator Always On

Trunk Ajar Indicator Always On

Trunk Ajar Indicator Inoperative

Trunk Ajar Indicator Inoperative

Scheme 3

Sill Plate, Striker, Weatherstrip Replacement - Rear Compartment

Scheme 4

Trim, Lid, Latch, Strut, Hinge Replacement - Rear Compartment

Removal Procedure

1. Use a flat bladed tool in order to pry up and release the tabs securing the switch the door trim panel.
2. Disconnect the electrical connector.

Installation Procedure

1. Connect the electrical connector.
2. Push the switch into the door trim panel in order to secure the mounting tabs.

Scheme 5

Rear Compartment Lid Switch Replacement (Exterior)

1. Use a small flat bladed tool to release the retaining tabs securing the switch to the instrument panel compartment.
2. Disconnect the electrical connector.

1. Connect the electrical connector.
2. Install the switch into the instrument panel compartment.

1. Remove the rear compartment sill plate.
2. Remove the rear compartment floor trim panel retainers.
3. Remove the rear compartment floor trim panel.
4. Remove the rear compartment side trim panel retainers.
5. Remove the rear compartment side trim panels.

1. Install the rear compartment side trim panels.
2. Install the rear compartment side trim panel retainers.
3. Install the rear compartment floor trim panel.
4. Install the rear compartment floor trim panel retainers.
5. Install the rear compartment sill plate.

1. Remove the push-in retainers (1) securing the rear wheelhouse liner to the vehicle.
2. Remove the screws (2) securing the rear wheelhouse liner to the vehicle.
3. Remove the rear wheelhouse liner from the vehicle.

1. Position the rear wheelhouse liner to the vehicle.
2. Install the push-in retainers (1) that secure the rear wheelhouse liner to the vehicle.
3. Install the screws (2) that secure the rear wheelhouse liner to the vehicle. Tighten: Tighten the screws to 6 N.m (53 lb in).

1. Open the fuel filler door.
2. Remove the fuel tank filler pipe housing to expose the rivets.
3. Drill out the rivets from the fuel filler door.
4. Remove the fuel filler door from the quarter panel.

1. Position the fuel filler door to the quarter panel.
2. Use new rivets to install the fuel filler door to the quarter panel.
3. Install the fuel tank filler pipe housing.
4. Close the fuel filler door.

Front-to-Rear, Side-to-Side

1. Loosen the fasteners securing the rear compartment lid to the rear compartment lid hinges.
2. Align the rear compartment lid in order to achieve an equal 3 mm +/- 1 mm gap around the entire perimeter of the rear compartment lid.
3. Tighten the hinge fasteners. Tighten: Tighten the hinge fasteners to 25 N.m (18 lb ft).

Up and Down Adjustment

1. Loosen the fasteners securing the rear compartment lid hinge to the vehicle body.
2. Move the rear compartment lid in order to adjust it to a flush fit with the vehicle quarter panels.
3. Tighten the fasteners in order to secure the rear compartment lid hinge to the vehicle body. Tighten: Tighten the rear compartment hinge fasteners to 25 N.m (18 lb ft)
4. Close the rear compartment.
5. Adjusting the rear compartment overslam bumpers may be necessary.

Handle Replacement - Rear Compartment Lid Interior Release

The rear compartment lid interior release handle is not serviced separately from the rear compartment lid striker. Refer to Sill Plate, Striker, Weatherstrip Replacement - Rear Compartment .

1. Remove the rear bumper fascia. Refer to «Fascia, Bracket, Bar, Absorber Replacement - Rear Bumper»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#bumper-system) in Bumpers.
2. Lift the lower flap of the pressure relief valve to expose the lower edge clip release tabs.
3. Disengage the clips by inserting a flat-bladed tool into the slots located at the front edge of the clips.
4. Remove the pressure relief valve by pulling the bottom edge of the valve away from the vehicle.

1. Position the pressure relief valve to the opening in the rear quarter panel.
2. Press inward on the pressure relief valve until fully seated.
3. Install the rear bumper fascia. Refer to «Fascia, Bracket, Bar, Absorber Replacement - Rear Bumper»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#bumper-system) in Bumpers.

Rear Compartment Lid Release

The rear compartment lid can be released by operating the interior rear compartment lid release switch, pressing the exterior rear compartment lid release switch while having a valid key fob with you, or pressing the rear compartment release button on the key fob.

When the rear compartment lid release is operated, battery voltage is switched to the rear compartment lid release actuator.

Rear Compartment Lid Release System Components

The rear compartment lid release system consists of the following components

1. Exterior Rear Compartment Lid Release Switch
2. Interior Rear Compartment Lid Release Switch
3. Driver Door Switch Assembly (DDSA)
4. Valet Lockout Switch
5. Instrument Panel Cluster (IPC) w/Driver Information Center
6. Instrument Panel Module (IPM)
7. Remote Control Door Lock Receiver (RCDLR)
8. Rear Integration Module (RIM)
9. Trunk Door Release Relay
10. Rear Compartment Lid Release Actuator (includes actuator and rear compartment lid ajar switch)

The RIM is the logic owner for the rear compartment lid release system. The decisions required to allow a rear compartment lid release are made in the RIM and it sends the request to release the lid. Other modules associated with this system are only used to report switch status or to operate the relay that controls the actuator according to requests from the RIM.

When the rear compartment lid release switch is operated, the DDSA detects the rear compartment lid release switch signal circuit connected to ground and sends a serial data message indicating the request has occurred.

The valet lockout switch is closed in the normal or non-valet position. When closed it supplies positive voltage to the valet lockout switch signal input to the IPM and the garage door opener. When the valet lockout switch is open in the valet position, positive voltage will not be detected by the IPM and the garage door opener will not have positive voltage. This is the Valet Lockout position. The IPM sends a serial data message containing the status of the valet lockout switch.

The RIM takes these serial data switch reports, and any requests from the key fob transmitters, and decides whether the rear compartment lid can be opened. If the RIM decides the request is authorized, the RIM will send a serial data message requesting the release of the rear compartment lid.

The RIM, when requested by a serial data message, will ground the trunk release relay control circuit. This energizes the coil and operates the trunk release relay. The relay then feeds positive voltage to the rear compartment lid release actuator.

Indicator Operation

When the trunk is ajar the rear compartment lid ajar switch is closed. This grounds the rear compartment lid ajar switch signal circuit to the RIM. The RIM then reports the switch status with a serial data message. The message is read by the IPC and a TRUNK OPEN message is displayed by the driver information center (DIC).

See also:
• Diagnostic System Check - Vehicle
• Testing for Intermittent Conditions and Poor Connections
• Circuit Testing
• Wiring Repairs
• Connector Repairs
• Control Module References
• Checking Aftermarket Accessories
• Front Door Switch Replacement
• Keyless Entry Schematics
• Fastener Notice
• Fascia, Bracket, Bar, Absorber Replacement - Rear Bumper
• Luggage Compartment Description and Operation
• Trunk Release Inoperative (Interior Release Inoperative )
• Trunk Release Inoperative (Exterior Release Inoperative)
• Trunk Ajar Indicator Always On
• Trunk Ajar Indicator Inoperative
• Fastener Tightening Specifications
• Handle Replacement - Rear Compartment Lid Interior Release