GM Service Manual Online
For 1990-2009 cars only

Folding Top Control (FTC) Module

5 Bow Lowered Position Switch: The scan tool displays Active/Inactive. When the 5 bow is in the lowered position, the switch is closed and the scan tool will display Active.

5 Bow Raised Position Switch: The scan tool displays Active/Inactive. When the 5 bow is in the raised position, the switch is closed and the scan tool will display Active.

8 Digit GM Part Number: The scan tool displays the part number of the module.

Battery Voltage Signal: The scan tool displays 9.0-16.0 Volts. The state of the voltage feed to the folding top control (FTC) module.

Calibration ID: The scan tool displays a  4 digit number. This number designates the calibration or program level used in the PROM.

Header Latch Switch: The scan tool displays Latched/Unlatched. When the header is unlatched, the scan tool displays the header unlatched input to the BCM as Unlatched. The BCM then sends a class 2 message via serial data line indicating the header unlatched status of the header switch.

Limit Switch Supply Voltage: The scan tool displays Present / Not Present. This history parameter displays the status of limit switch accessory voltage to the FTC module the last time top operation was attempted, as Present/Not Present

Luggage Barrier In Place: This parameter is in multiple data lists, Inputs and Roof History Data. The scan tool displays Yes/No. With the luggage barrier in place, the scan tool will display the luggage barrier limit switch input to the FTC module as Yes. The history parameter identifies the position of the luggage barrier the last time top operation was attempted.

Module Over Current Detected: The scan tool displays OK/High. The scan tool will display High if the current through the module is above the safe operating level. This history parameter identifies the current through the module the last time top operation was attempted.

Module Over Voltage Detected: The scan tool displays OK/High. The scan tool will display High if the voltage supply to the FTC module is above the safe operating level of 16.0 volts. This history parameter identifies the module voltage level the last time top operation was attempted.

Module Under Voltage Detected: The scan tool displays OK/Low. The scan tool will display Low if the voltage supply to the FTC module is below the safe operating level of 9.0 volts. This history parameter identifies the module voltage level the last time top operation was attempted.

Motor Command: The scan tool displays 0-127 amps. The amount of current used through the module during folding top operation.

Motor X Direction Command: The scan tool displays On / Off. The motor output, X direction, from the FTC module, where the movement is displayed as On/Off.

Motor Y Direction Command: The scan tool displays On / Off. The motor output, Y direction, from the FTC module, where the movement is displayed as On/Off.

Power Mode: The scan tool displays Accy. Or Run / Not Accy. Or Run. The class 2 message as to the Power Mode status, when it is either in Accessory or RUN, is displayed once the folding top control switch is released. This history parameter identifies the power mode the last time top operation was attempted.

Power Pull Down Ajar Status: The scan tool displays Closed/Ajar. During folding top operation, when the folding top cover pull down is extended to the up position, the scan tool will display the status of the pull down as Ajar. When the pull down is retracted to the down position, the scan tool will display the pull down status as Closed.

Prom ID: The scan tool displays a 4 digit number. This is the identification number of the PROM that is incorporated into the module.

Pump Motor Temp. Sensor: The scan tool displays °F/°C. The temperature of the pump motor thermistor is displayed as Fahrenheit/Celsius.

Pump Over Temperature Sensor: The scan tool displays Normal/Overtemp. The pump motor thermistor input to the FTC module, when the temperature is outside of the normal operating range it will be displayed as Overtemp. This history parameter identifies pump temperature status the last time top operation was attempted.

Tonneau Latch Switch: The scan tool displays Closed/Ajar. After the BCM releases the folding top cover, the scan tool will display the folding top cover latch ajar input to the BCM as Ajar. The BCM then send a class 2 message via the serial data line indicating the ajar status of the folding top cover.

Tonneau Open Limit Switch: This parameter is located in the Roof History Data list. The scan tool displays Active / Inactive. During folding top operation when the tonneau, also referenced as the folding top cover, is in the open position, the scan tool will display the folding top cover switch input to the FTC module as Active. When the folding top cover in any position other than the full open position, the scan tool will display Inactive.

Too Cold For Top Operation: The scan tool displays Yes/No. The pump motor thermistor input to the FTC module, when the temperature is too cold, the scan tool will display Yes. This history parameter identifies pump temperature status the last time top operation was attempted.

Top Closed Limit Switch: The scan tool displays Active / Inactive. When the top is in the closed position, the scan tool will display the top closed limit switch input to the FTC module as Active. When the top is in any position other than the closed position, the scan tool will display Inactive.

Top Control Switch : The scan tool displays Idle / Open / Closed / Invalid. The FTC module monitors the folding top control switch open signal and close signal inputs, comparing the inputs and displaying the status as Open, Close, Idle or Invalid. The scan tool will display Invalid if both the open and closed switch inputs are active at the same time.

Top Opened Limit Switch: The scan tool displays Active/Inactive. When the top is in the open or stowed position, the scan tool will display the top open limit switch input to the FTC module as Active. When the top is in any position other than the opened position, the scan tool will display Inactive.

Trunk Ajar: The scan tool displays Closed/Ajar. When attempting to operate the power folding top, if the trunk is open position, the scan tool will display the status of the trunk as Ajar. This history parameter identifies the trunk status the last time top operation was attempted.

Valve 1 Command: The scan tool displays On/Off. The valve control output from the FTC module where the valve request is displayed as On or Off. The display will vary between On and Off based on the sequence of top operation. If the folding top is suspended, not having completed an open or closing cycle, and the folding top open/close control switch is released, the valve will be On. Then after approximately 4 minutes hydraulic pressure will be released by the FTC module cycling the valves Off and On allowing the top to gradually settle to a resting position.

Valve 2 Command: The scan tool displays On/Off. The valve control output from the FTC module where the valve request is displayed as On or Off. The display will vary between On and Off based on the sequence of top operation. If the folding top is suspended, not having completed an open or closing cycle, and the folding top open/close control switch is released, the valve will be On. Then after approximately 4 minutes hydraulic pressure will be released by the FTC module cycling the valves Off and On allowing the top to gradually settle to a resting position.

Valve 3 Command: The scan tool displays On/Off. The valve control output from the FTC module where the valve request is displayed as On or Off. The display will vary between On and Off based on the sequence of top operation. If the folding top is suspended, not having completed an open or closing cycle, and the folding top open/close control switch is released, the valve will be On. Then after approximately 4 minutes hydraulic pressure will be released by the FTC module cycling the valves Off and On allowing the top to gradually settle to a resting position.

Vehicle In Park: The scan tool displays Yes/No. This history parameter identifies if the vehicle PARK status the last time top operation was attempted. If the transmission is in PARK, the scan tool will display the park position of the transmission as Yes.

Body Control Module (BCM)

Battery Voltage Signal: The scan tool displays 9.0-16.0 Volts. The state of the voltage feed to the module.

Window Normalization: The scan tool displays Yes / No. The driver window motor normalization state, as seen by the DDM.

Driver Door Module (DDM)

Battery Voltage Signal: The scan tool displays 9.0-16.0 Volts. The state of the voltage feed to the module.

Window Normalization: The scan tool displays Yes / No. The driver window motor normalization state, as seen by the DDM.

Passenger Door Module (PDM)

Battery Voltage Signal: The scan tool displays 9.0-16.0 Volts. The state of the voltage feed to the module.

Window Normalization: The scan tool displays Yes / No. The passenger window motor normalization state, as seen by the PDM.