The power folding top system consists of the following components:

The folding top control (FTC) module has 2 modes of operation, the folding top control and the decklid control. The folding top is activated by the folding top control switch. The decklid is activated with the interior trunk release switch, key FOB, external key and the trunk close switch.

Through input information, the FTC module performs the following tasks:

The FTC module can stop and reverse the operation at any point when you apply the folding top control switch. To avoid an inadvertent operation of the folding top system when fully open or closed, a 0.75 second delay occurs after the use of the control switch before the FTC module starts the operating sequence. When you activate the system from a suspended state, the response time is less.

Before any movement of the top is allowed, the folding top control (FTC) must be aware of the following conditions:

The sequence for opening the top is as follows:

1. Hold the open/close control switch to the open request position.

The folding top status changes to Opening.

2. A message is sent to disable the windows from operating using the door switches.
3. The windows open using the Express open mode.
4. The decklid is unlatched.
5. the deck lid opens, the front tonneau opens and the header latch unlatches.
6. The top retracts to the open position and is stowed in the rear compartment.
7. The rear tonneau is extended.
8. The header latch latches securing the top and the front tonneau closes.
9. The deck lid closes.
10. The deck lid latches.
11. The top status changes from Closed to Open and a chime tone is heard.
12. The windows are enabled.

The sequence for closing the top is as follows:

1. Hold the open/close control switch in the close request position.

The folding top status changes to Closing.

2. A message is sent to disable the windows from operating using the door switches.
3. The windows open using the Express open mode.
4. The decklid is unlatched.
5. The deck lid opens, the front tonneau opens and the header latch unlatches.
6. The rear tonneau retracts.
7. The top extends to the closed position.
8. The rear tonneau remains retracted.
9. The header latch latches and the front tonneau closes.
10. The deck lid closes.
11. The deck lid latches.
12. The top status changes from Open to Closed and a chime tone is heard.
13. The windows are enabled.
14. Raise the windows using the Express up mode, by releasing and pressing the open/close control switch within 5 seconds of the top being secured in the closed position.

The folding top control (FTC) module determines the state of all the moving components of the folding top system during an open or close operation using the potentiometers that monitor the folding top and the front and rear tonneau panels. The FTC module records the open and close reference positions and determines the current position of the panel, shown as counts on the scan tool. For example, if a sensor open reference is set at 100 counts and the close reference is set at 200 counts, the component will operate within those limits. As a component reaches the reference point, the system will continue to drive the component to secure the component in place. This means that the status of the component will be outside of the reference position counts.

If a component does not reach a learned reference position, based on counts, the system will continue to drive that component until the component reaches the reference point. If this reference position is not achieved, the system will time-out and will not complete the cycle.

When an inspection of the components or a repair to the system is completed, perform a folding top learn procedure. Refer to Power Folding Top Learn .

The folding top control (FTC) module will control the hydraulic system, which moves the folding top components, by controlling the On/Off state and the direction of the hydraulic pump motor, and by controlling the open/close state of each valve. The 5 valves controlled by the FTC module move the following components:

The rear tonneau is controlled by the pump bypass valve located at the hydraulic reservoir The direction of the tonneau movement is based on the motor direction.

Whenever the open/close control switch is released or the top becomes inoperative in a suspended state, pressure will be maintained in the system to avoid drifting and damage of components. After 4 minutes the hydraulic pressure will be released by cycling the valves ON and OFF. This allows the top to gradually settle to a resting position.

The pump motor continuously monitors the thermistor temperature sensor for temperatures which are too high or too low. Different operating temperature setting are required for the decklid and the folding top functions. If the control module detects a temperature between the pump motor pre-alarm setting and the pump motor alarm setting, the current open/close operation shall be completed, but no new top operation will be allowed until the pump motor cools below the pre-alarm setting. If the temperature reaches the pump motor alarm value, all top operation will cease. A low temperature value is sent over the class 2 serial data that will also cease all operation when the outside temperature is below this value. The pump motor temperature settings are:

Under certain conditions the driver shall be alerted with one of several messages. These messages are sent through class 2 serial data to the driver information center/instrument panel.

If the folding top control (FTC) module is requested to operate the folding top and discovers that a component is not in the correct position based on information from other inputs, the FTC will move those components to a safe position before executing the sequence requested by the control switch. At first this will look as though the folding top is moving in the incorrect direction, but as soon as the FTC module moves those components to a safe position, the FTC will then operate the system as requested.