Body Closures - System Operation and Component Description

System Operation

System Diagram

Network Message Chart

  RGTM Network Input Messages

Power Luggage Compartment Lid

Power Open

The power luggage compartment lid power open operation begins when:

• the RGTM detects the front power luggage compartment lid switch.
• the RGTM detects the luggage compartment lid release switch is pressed.
• the RGTM receives a message from the BCM (indicating a double button press from a programmed RKE transmitter or a passive entry feature request).

Once the RGTM receives an open request, the power luggage compartment lid opens by carrying out the following:

• The RGTM checks the gear selector lever position from the messages received.
• The RGTM supplies power to the unlatch motor, releasing the luggage compartment lid latch.
• The luggage compartment lid latch ajar switch opens to ground, indicating to the RGTM the latch has successfully released.
• The RGTM performs 2 actions simultaneously.
  • The RGTM supplies power to the power luggage compartment lid power striker motor while monitoring the top of travel switch. When the RGTM detects the top of travel is reached (top of travel switch closes), power is removed from the luggage compartment lid power striker motor.
  • The RGTM supplies power to the drive motor, opening the power luggage compartment lid.
• While the power luggage compartment lid is opening, the RGTM monitors the position sensor for luggage compartment lid position and velocity. If an obstruction is detected, the RGTM stops the luggage compartment lid drive motor.
• When the power luggage compartment lid reaches the full open position, the RGTM removes the power from the drive motor.

If any of the power luggage compartment lid switches or a double press of the button on a RKE transmitter occurs during a power open, the luggage compartment lid stops and holds its position.

Power Close

The power luggage compartment lid power close operation begins when:

• the RGTM detects the front power luggage compartment lid switch is pressed.
• the RGTM detects the rear power luggage compartment lid switch is pressed.
• the RGTM detects the luggage compartment lid release switch is pressed.
• the RGTM receives a message from the BCM (indicating a double button press from a RKE transmitter).

Once the close request is received, the power luggage compartment lid closes by carrying out the following:

• The RGTM checks the gear selector lever position and vehicle speed status from the messages received.
• The RGTM sounds an audible chime.
• The RGTM supplies power to the drive motor.
• While the power luggage compartment lid is closing, the RGTM monitors the position sensor (for luggage compartment lid position and velocity). If an obstruction is detected, the power luggage compartment lid stops and reverses.
• The RGTM monitors the luggage compartment lid ajar state.
• The luggage compartment lid latch ajar switch closes to ground, indicating to the RGTM the latch has successfully latched.
• When the RGTM detects the luggage compartment lid has latched, power is supplied to the luggage compartment lid power striker motor to pull the luggage compartment lid into the fully closed position. When the RGTM detects the bottom of travel is reached (bottom of travel switch closes), power is removed from the luggage compartment lid power striker motor.

If any of the power luggage compartment lid switches or the button on the RKE transmitter is pressed during a power close, the luggage compartment lid stops and holds its position.

NOTE: The power luggage compartment lid may not operate correctly under the following conditions:

• Excessive weight (such as snow or ice) is present on top of the luggage compartment lid.
• A low voltage or drained battery.
• A disconnected battery.
• Repairs/adjustments have been made to the power luggage compartment lid rod, power luggage compartment lid motor or luggage compartment lid hinges.

If any of these conditions have occurred, the power luggage compartment lid must be re-initialized.

Power Luggage Compartment Lid Chime

The power luggage compartment lid chime provides audible warnings to the operator. The power luggage compartment lid chime speaker is part of the RGTM and not serviceable separately.

The power luggage compartment lid feature sounds an audible chime for 3 seconds when:

• the luggage compartment lid is requested to begin power closing.
• the luggage compartment lid reverses to power opening due to an obstacle.
• the luggage compartment lid stops opening due to an obstacle.

The power luggage compartment lid feature sounds an audible chime for 1 second when there is an open/close request and:

• the ignition is on and the transmission is not in PARK.
• the battery voltage is low.

Component Description

Front Power Luggage Compartment Lid Switch

The front power luggage compartment lid switch (located on the instrument panel) is a momentary contact switch that routes the voltage signal from the RGTM to ground when pressed. Pressing this switch either opens, closes or stops the motion of the power luggage compartment lid.

Rear Power Luggage Compartment Lid Switch

The rear power luggage compartment lid switch (located on the inside of the luggage compartment lid) is a momentary contact switch that routes the voltage signal from the RGTM to ground when pressed. Pressing this switch closes the power luggage compartment lid. The power luggage compartment lid does not open or release the latch from the rear power luggage compartment lid switch.

Luggage Compartment Lid Release Switch

The luggage compartment lid release switch is a momentary contact switch that routes the voltage signal to ground when pressed. The signal is sent from the BCM and the RGTM .

If the doors were not previously electronically unlocked when the luggage compartment lid release switch is pressed, the BCM activates the luggage compartment lid passive entry feature. If the BCM detects a programmed passive key, the BCM sends a message to the RGTM to open the luggage compartment lid. If no passive key is detected, the request is ignored.

If the doors were previously electronically unlocked when the luggage compartment lid switch is pressed, the BCM sends a message to the RGTM to open the luggage compartment lid.

Any subsequent presses of the switch stops the motion or reverses direction.

Luggage Compartment Lid Latch

The luggage compartment lid latch is responsible for unlatching, latching and providing the ajar status of the latch. The luggage compartment lid latch contains the luggage compartment lid ajar switch and the unlatching motor.

Luggage Compartment Lid Power Striker Motor

The luggage compartment lid power striker motor contains a bi-directional motor and 2 switches. The switches are used to indicate top or bottom of travel of the power striker motor. Only one switch can be closed to ground at a time. When the luggage compartment lid power striker motor is between the top and bottom of travel, both switches are open.

Power Luggage Compartment Lid Motor

The power luggage compartment lid motor raises and lowers the luggage compartment lid. The power luggage compartment lid motor is bi-directional and contains a position sensor that provides input to the RGTM for luggage compartment lid position and velocity.

Position Sensor

The RGTM supplies voltage signals to the position sensor on a valid open command or when the luggage compartment lid is in the open position. The RGTM provides the ground. The position sensor has 2 data lines that the RGTM monitors to determine luggage compartment lid movement and position. The RGTM uses the luggage compartment lid position information to determine which direction to power the luggage compartment lid (open or close) when a valid operation command is received. The movement is monitored to identify obstructions.

RGTM

The RGTM sends voltage signals to the front and rear power luggage compartment lid switches and the luggage compartment lid release switch. When a switch is pressed, the signal is routed to ground, pulling the signal low, indicating a request to open or close the luggage compartment lid.

The RGTM receives a message from the BCM upon a valid request from the passive entry system or a RKE transmitter.

The RGTM controls the opening and closing of the power luggage compartment lid based on the inputs it receives.

The RGTM does not require Programmable Module Installation (PMI) when it is replaced.

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