Manually Moving the Folding Top from the Down Position
Important: Allow the system a minimum of four minutes to bleed down pressure after the last cycle.
Manually release the folding top cover latch using the emergency release cable.
Raise the folding top stowage cover.
Manually raise the folding top, holding the 5 bow up.
Manually lower and latch the folding top stowage cover.
Manually unfold the top and latch per normal procedure.
Manually Moving the Folding Top from the Up Position
Important: Allow the system a minimum of four minutes to bleed down pressure after the last cycle.
Manually release header latch per normal operation.
Manually lift front of roof off of the header and raise the #5 bow at the same time.
Manually release the Folding Top Cover latch using the emergency release cable.
Fold the roof down into the well.
Manually close and latch the folding top stowage cover.
Power Folding Top System Components
The power folding top system consists of the following components:
• Folding top control (FTC) module
• Body control module (BCM)
• Folding top control switch
• Serial data communication
• Folding top cover latch actuator
• Folding top cover pull down actuator
• Folding top pump motor with valve manifold
• Position switches and limit switches:
- Pin receiver switch
- Luggage barrier switch
- Folding top cover open switch
- Top open switch
- Top closed switch
- 5 bow raised switch
- 5 bow lowered switch
• Tonneau release relay
• TONNEAU PULL DOWN ACTUATOR Fuse 20 A
• TONNEAU RELEASE Fuse 10 A
• BATT 2 Fuse 40 A
• REAR FOG/ALDL TOP SW Fuse 10 A
• Folding top mechanical components:
- Folding top
- Folding top cover
- Folding top valve 1
- Folding top valve 2
- Folding top valve 3
- Hydraulic lines and cylinders
Folding Top Cover Latch Actuator
The power folding top system includes a folding top cover that is powered open and close by a hydraulic system that is controlled by the FTC module. A power unlatch motor is used to unlatch the folding top cover before the folding top control (FTC) module powers the top cover open. The folding top cover unlatching is requested by the FTC module via class 2 message, but is executed by the body control module (BCM). When requested, the BCM applies battery voltage through the folding top cover release relay control circuit to the tonneau release relay. The relay is energized and battery voltage is applied through the folding top cover release control circuit to the latch actuator. The actuator is energized and the latch releases the folding top cover.
The electronics on this are very complex ,
System Operation
Before any movement of the power folding top is allowed, the folding top control (FTC) module must be aware of the following conditions:
• Unlatch the header. The FTC module reads the pin receiver switch is Inactive.
• The windows must be normalized. Refer to Power Window Reinitialization.
• The ignition must be placed in Accessory or RUN.
• The transmission must be placed in PARK, or with manual transmission, the park brake must be applied.
• Trunk status must not be ajar.
• The luggage barrier must be in place.
• The pump motor temperature must be within the operating range.
After the last cycle of power folding top operation, allow the hydraulic system a minimum of 4 minutes to bleed down before attempting manual operation of the top.
Your best bet take and have it checked for DTC'S - diagnostic trouble codes .
DTC B3666 Rear Tonneau Position Error
DTC B3667 Tonneau Release Circuit
DTC B1011
DTC B1291
DTC B1420
DTC B3602
DTC B3666
DTC B3667
DTC B3670
DTC B3971
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GMLAN communication to the Body Control Module (BCM)
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Open/Close request circuit to the driver and passenger window motors
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Power and Grounds
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Folding Top Main Power Fuse 30A
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Folding Top Logic Power Fuse 20A
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Ground G301 for the FTC module and G305
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Folding Top Open/Close Switch (S15 and S16)
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Rear Compartment Limit Switches
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Rear Compartment Lid Release Switch (S3 and S4)
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Rear Compartment Lid Release Switch-Front Hinge-Left (S11 and S12)
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Rear Compartment Lid Release Switch-Front Hinge-Right (S9 and S10)
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Folding Top Front Location Pin Guide-Left (S17 and S18)
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Rear Compartment Lid Release Switch-Left (S19A)
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Rear Compartment Lid Release Switch-Right (S19B)
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Rear Compartment Partition Position Switch (S20)
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Folding Top Front Location Pin Position Switch (S13)
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Folding Top Front Latch Actuator Position Switch (S14)
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Hall Effect Sensors
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Folding Top Header Latch Cylinder Sensor (S1)
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Rear Compartment Cylinder Extended Sensor (S2)
DTC B367F 58: Roof Stowed Ready to Latch Sensor Circuit incorrect reaction after event
DTC B367F 59: Roof Stowed Ready to Latch Sensor Circuit circuit/component protection time out
DTC B367B 58: Deck Lid Anti-Rotation Latched Sensor Circuit incorrect reaction after event
DTC B367B 59: Deck Lid Anti-Rotation Latched Sensor Circuit circuit/component protection time out
Your best bet is probably to take your vehicle to a qualified repair shop.
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Hydraulic pump assembly; valve 1, valve 2 and motor
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The hydraulic lines and the cylinders
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GMLAN communication to the Body Control Module (BCM)
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Open/Close request circuit to the driver and passenger window motors
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Power and Grounds
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Folding Top Main Power Fuse 30A
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Folding Top Logic Power Fuse 20A
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Ground G301 for the FTC module and G305
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Folding Top Open/Close Switch (S15 and S16)
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Rear Compartment Limit Switches
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Rear Compartment Lid Release Switch (S3 and S4)
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Rear Compartment Lid Release Switch-Front Hinge-Left (S11 and S12)
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Rear Compartment Lid Release Switch-Front Hinge-Right (S9 and S10)
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Folding Top Front Location Pin Guide-Left (S17 and S18)
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Rear Compartment Lid Release Switch-Left (S19A)
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Rear Compartment Lid Release Switch-Right (S19B)
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Rear Compartment Partition Position Switch (S20)
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Folding Top Front Location Pin Position Switch (S13)
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Folding Top Front Latch Actuator Position Switch (S14)
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Hall Effect Sensors
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Folding Top Header Latch Cylinder Sensor (S1)
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Rear Compartment Cylinder Extended Sensor (S2)
Your best bet is have the system checked for DTC'S - diagnostic trouble codes ! If it showed a message top not secured there is a DTC stored in the control module ! there are 24 possible DTC'S
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Usually answered in minutes!
Folding Top Stowage Compartment Lid Release Inoperative
Diagnostic Aids
• When using the scan tool, the folding top cover is referenced as the tonneau.
• If a repair is made to a signal circuit for a short to ground, test the component of that circuit for proper operation.
• Removing the tonneau release relay will set a DTC and stop power folding top operation. Once the relay is replaced, the ignition must be cycled OFF then Run ACCY in order to continue operation.
• Using the scan tool to access the History parameters for the folding top control (FTC) module, will display the last status of the items listed.
Test Description
This step verifies the open or closed position of the power folding top.
This step verifies that the body control module (BCM) is applying battery voltage to the control circuit of the tonneau release relay. Removing the tonneau release relay will set DTC B3637 causing the BCM to disable output control of the relay until the ignition is cycled OFF/Run ACCY. After the test lamp is connected in place of the relay, the ignition must be cycled OFF/Run ACC in order for this step to be a valid test.
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