Folding Top System Chevrolet Corvette C6

Fastener Tightening Specifications

Scheme 1

Scheme 2

Scheme 3

Scheme 4

Scheme 5

Each cylinder is serviced by 2 hoses

1. The rod end (1)
2. The closed end (2)

Scheme 6

Each hose has an identification number stamped on the cylinder side and on the pump side near the connection point. Corresponding numbers are also stamped on the pump manifold plate to aid in identification.

The following chart identifies the hose that supplies fluid to each specific cylinder.

Folding Top Hydraulic Cylinder Hose Identification Chart

DIAGNOSTIC CODE INDEX

DIAGNOSTIC CODE INDEX

Diagnostic Starting Point - Roof

Begin the system diagnosis with Diagnostic System Check - Vehicle . The Diagnostic System Check - Vehicle 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 - Vehicle will identify the correct procedure for diagnosing the system and where the procedure is located.

Diagnostic Instructions

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Diagnostic Fault Information

Circuit/System Description

Battery positive voltage is supplied to the folding top control (FTC) module from the BAT MAIN 2 fuse. When commanded, this voltage is used by the FTC module to power the folding top pump motor through the motor control circuits. When an over current condition is detected, the FTC module disables the folding top pump motor in order to protect the internal FTC module circuitry.

Conditions for Running the DTC

The FTC module monitors for over current only when the power folding top pump motor is active.

Conditions for Setting the DTC

1. High over current-The FTC module will set DTC B1011 when the measured current exceeds 90 amps for 30 milliseconds. This tests runs every 3 milliseconds.
2. Medium over current-The FTC module will set DTC B1011 when the measured current exceeds 60 amps for 1 seconds. This tests runs every 3 seconds.
3. Low over current-The FTC module will set DTC B1011 when the measured current exceeds 40 amps for 30 seconds. This tests runs every 100 milliseconds.

Action Taken When the DTC Sets

1. All folding top functions in progress are aborted, including calibrations of the folding top.
2. The FTC module will suspend operation of the folding top pump motor.

Conditions for Clearing the DTC

1. This DTC will clear on the current status after the condition for setting the fault is corrected.
2. A history DTC will clear after 50 consecutive ignition cycles without a fault present.

Reference Information

Schematic Reference

Folding Top Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Power Folding Top Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for Scan Tool Information

Circuit/System Testing

1. Ignition OFF, disconnect the X431 inline harness connector.
2. Connect a test lamp between the control circuit terminal A4 and the control circuit terminal B4.
3. Ignition ON, command the Pump Motor A Direction and Pump Motor B Direction On and OFF with a scan tool. The test lamp should turn ON when commanding the Pump Motor A Direction and Pump Motor B Direction states. If the test lamp remains OFF during either of the commands, test for a short to ground on either control circuit. If the circuits test normal, replace the FTC module.
4. If all circuits test normal, replace the folding top pump motor assembly.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Folding Top Pump with Motor Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system)
2. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for FTC module replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The body control module (BCM) supplies ignition voltage to the 5 bow raised and 5 bow lowered switches. The folding top control (FTC) module monitors the signal circuits of these switches to determine the 5 bow raised and 5 bow lowered position of the top. When the top is in the closed position the following definitions of the switches will be true

1. 5 bow raised switch - The switch is open and the scan tool parameter should display Inactive.
2. 5 bow lowered switch - The switch is closed to voltage and the scan tool parameter should display Active.

When the top is in the open/stowed position the following definitions of the switches will be true

1. 5 bow raised switch - The switch is closed to voltage and the scan tool parameter should display Active.
2. 5 bow lowered switch - The switch is open and the scan tool parameter should display Inactive.

The FTC module must be powered and cannot have B1327 or B1328 set as active DTCs for this DTC to set. The battery voltage is between 9-16 volts.

The FTC module will set B1291 as a current DTC if it senses that both the 5 bow raised and 5 bow lowered switches are active at the same time.

1. The FTC module disables all folding top functions.
2. If the condition occurs during operation of the folding top, once the top control switch is released, the FTC module will send a class 2 message to the driver information center (DIC), displaying TOP NOT SECURE.

1. This DTC will clear on the current status after the condition for setting the fault is corrected.
2. A history DTC will clear after 50 consecutive ignition cycles without a fault present.

Diagnostic Aids

When the top is in the stowed position, the 5 bow is still in the raised position.

Schematic Reference

Folding Top Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Power Folding Top Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. When the folding top is in the closed position, the 5 bow raised switch is open and the scan tool 5 Bow Raised Pos. Switch parameter should be Inactive. If not the specified value, refer to the «5 Bow Raised Switch Test»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system__5-bow-raised-switch-test) .
2. When the folding top is in the open position, the 5 bow lowered switch is open and the scan tool 5 Bow Lowered Pos. Switch parameter should be Inactive. If not the specified value, refer to the «5 Bow Lowered Switch Test»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system__5-bow-lowered-switch-test)

5 Bow Raised Switch Test

1. Ignition OFF, disconnect the harness connector at the 5 bow raised switch.
2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal B and ground. If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
3. Ignition ON, verify the scan tool 5 Bow Raised Pos. Switch parameter is Inactive. If not the specified value, test the signal circuit for a short to voltage. If the circuit tests normal, replace the FTC module.
4. Install a 3A fused jumper wire between the ignition circuit terminal B and the signal circuit terminal A. Verify the scan tool 5 Bow Raised Pos. Switch parameter is Active. If not specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the FTC module.
5. If all circuits test normal, test or replace the 5 bow raised switch.

5 Bow Lowered Switch Test

1. Ignition OFF, disconnect the harness connector at the 5 bow lowered switch.
2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal B and ground. If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
3. Ignition ON, verify the scan tool 5 Bow Lowered Pos. Switch parameter is Inactive. If not the specified value, test the signal circuit for a short to voltage. If the circuit tests normal, replace the FTC module.
4. Install a 3A fused jumper wire between the ignition circuit terminal B and the signal circuit terminal A. Verify the scan tool 5 Bow Lowered Pos. Switch parameter is Active. If not specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the FTC module.
5. If all circuits test normal, test or replace the 5 bow lowered switch.

Component Testing

1. Ignition OFF, disconnect the harness connector at the appropriate 5 bow raised or lowered switch.
2. Test for infinite resistance between the signal terminal A and the ignition terminal B with the switch in the open position. If not the specified value, replace the switch
3. Test for less than 1 ohm between the signal terminal A and the ignition terminal B with the switch in the closed position. If greater than the specified range, replace the inoperative switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Folding Top Position Switch Replacement - Number 5 Bow»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system)
2. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for FTC module and BCM replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The body control module (BCM) applies battery voltage to the accessory voltage circuit when the ignition is in the ON position. The folding top control (FTC) module monitors this circuit at least once every 300 milliseconds to determine if voltage is supplied to the following folding top switches

1. Top open switch
2. Top closed switch
3. Luggage barrier switch
4. Folding top cover open switch
5. 5 bow raised switch
6. 5 bow lowered switch
7. Header latched switch

The FTC module must be powered and can not have B1327 or B1328 set as active DTCs for this DTC to set. The battery voltage is between 9 - 16 volts.

1. If the FTC module detects the accessory voltage dropping below 3 volts.
2. The power mode is either in Accessory, RUN, Rap or Crank.

1. Stores a current and history DTC B1420 in the FTC module.
2. The folding top operation is suspended.
3. If the condition occurs during operation of the folding top, once the top control switch is released, the FTC module will send a class 2 message to the driver information center (DIC), displaying TOP NOT SECURE.

1. This DTC will clear on the current status after the condition for setting the fault is corrected.
2. A history DTC will clear after 50 consecutive ignition cycles without a fault present.

Schematic Reference

Folding Top Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Power Folding Top Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for Scan Tool Information

1. Ignition OFF, disconnect the X2 harness connector at the FTC module.
2. Ignition ON, test for B+ between the ignition circuit terminal D11 and ground. If less than the specified value, test the ignition circuit for a short to ground or an open/high resistance. If all circuits test normal, replace the BCM.
3. If all circuits test normal, replace the FTC module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for FTC module and BCM replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The folding top control (FTC) module checks the integrity of the signal circuits from the folding top control switch at least once every 300 milliseconds. The folding top control switch has a constant battery positive voltage supplied. Pressing the folding top control switch to the open or close position will apply the battery positive voltage to the appropriate folding top control switch open or close signal circuit to the FTC module. The FTC module monitors these signal circuits to control the direction of the folding top.

The FTC module must be powered and can not have B1327 or B1328 set as active DTCs for this DTC to set. The battery voltage is between 9-16 volts.

1. When the FTC module detects inputs on both the folding top control switch open and close signal circuits at the same time.
2. When the FTC module detects either of the folding top control switch open or close signal circuits active for 3 minutes or more.

1. The folding top operation is suspended.
2. The FTC module stores B3602 as a current and history DTC.

1. This DTC will clear on the current status after the condition for setting the fault is corrected.
2. A history DTC will clear after 50 consecutive ignition cycles without a fault present.

Schematic Reference

Folding Top Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Power Folding Top Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition OFF, disconnect the harness connector at the folding top control switch.
2. Ignition ON, verify the scan tool Top Control Switch parameter is Inactive. If not the specified value, test the signal circuits terminal 2 and terminal 5 for a short to voltage. If the circuits test normal, replace the FTC module.
3. If all circuits test normal, test or replace the folding top control switch.

Folding Top Control Switch

1. Ignition OFF, disconnect the harness connector at the folding top control switch.
2. Test for infinite resistance between the signal terminal 2 and the B+ terminal 4 with the switch in the open position. If not the specified value, replace the folding top control switch.
3. Test for less than 1 ohm between the signal terminal 2 and the B+ terminal 4 with the switch in the closed position. If not the specified value, replace the folding top control switch.
4. Test for infinite resistance between the signal terminal 5 and the B+ terminal 4 with the switch in the open position. If not the specified value, replace the folding top control switch.
5. Test for less than 1 ohm between the signal terminal 5 and the B+ terminal 4 with the switch in the closed position. If not the specified value, replace the folding top control switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Folding Top Switch Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system)
2. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for FTC module replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The body control module (BCM) supplies ignition voltage to the folding top cover open switch. The folding top control (FTC) module monitors the signal circuit of this switch to determine the open and closed position of the folding top cover. At the same time the BCM supplies battery voltage to the folding top cover latch ajar switch and monitors this circuit to determine if the folding top cover is latched or unlatched. The BCM communicates the status of the folding top cover latch ajar switch via class 2 message to the FTC module.

The FTC module must be powered and can not have B1327 or B1328 set as active DTCs for this DTC to set. The battery voltage is between 9-16 volts.

DTC B3666 will set as a current DTC, if the FTC module senses that the folding top cover latch is not ajar while the folding top cover open limit switch is active.

1. The folding top operation is suspended.
2. Current and history DTCs are stored.

1. This DTC will clear on the current status after the condition for setting the fault is corrected.
2. A history DTC will clear after 50 consecutive ignition cycles without a fault present.

1. The Folding Top Cover is also referenced as the Tonneau Cover.
2. The scan tool references the Folding Top Cover Open Switch as the Tonneau Open Limit Switch
3. The scan tool references the Folding Top Cover Latch as the Tonneau Latch Switch

Schematic Reference

Folding Top Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Power Folding Top Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

When the folding top cover is in the closed position, the following scan tool parameter definitions should be true

1. Tonneau Open Limit Switch - The switch is open and the scan tool parameter should be Inactive. If not the specified value, refer to the «Folding Top Cover Open Switch Test»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system__folding-top-cover-open-switch-test) .
2. Tonneau Latch Switch - The switch is open and the scan tool parameter should be Closed. If not the specified value, refer to the «Folding Top Cover Latch Test»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system__folding-top-cover-latch-test)

When the folding top cover is in the open position, the following scan tool parameter definitions should be true

1. Tonneau Open Limit Switch - The switch is closed to voltage and the scan tool parameter should be Active. If not the specified value, refer to the «Folding Top Cover Latch Test»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system__folding-top-cover-latch-test) .
2. Tonneau Latch Switch - The switch is closed to ground and the scan tool parameter should be Ajar. If not the specified value, refer to the «Folding Top Cover Latch Test»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system__folding-top-cover-latch-test) .

Folding Top Cover Open Switch Test

1. Ignition OFF, disconnect the harness connector at the folding top cover open switch.
2. Ignition ON, verify the scan tool Tonneau Open Limit Switch parameter is Inactive. If not the specified value, test the signal circuit terminal A for a short to voltage. If the circuits test normal, replace the FTC module.
3. Install a 3A fused jumper wire between the ignition circuit terminal B and the signal circuit terminal A. Verify the scan tool Tonneau Open Limit Switch parameter is Active. If not the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuits test normal, replace the FTC module.
4. Ignition OFF, disconnect the harness connector at the folding top cover pull down actuator.
5. Ignition ON, verify the scan tool Power Pull Down Ajar Status parameter is Closed. If not the specified value, test the signal circuit terminal E for a short to ground. If the circuit test normal, replace the BCM.
6. If all circuits test normal, test or replace the folding top cover open switch.

Folding Top Cover Latch Test

1. Ignition OFF, disconnect the X2 harness connector at the folding top cover latch actuator.
2. Test for less than 5 ohms between the ground circuit terminal B and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify the scan tool Tonneau Latch Switch parameter is Closed. If not the specified value, test the signal circuit terminal A for a short to ground. If the circuits test normal, replace the FTC module.
4. Install a 3A fused jumper wire between the signal circuit terminal A and the ground circuit terminal B. Verify the scan tool Tonneau Open Limit Switch parameter is Ajar. If not the specified value, test the signal circuit for an open/high resistance. If the circuits test normal, replace the BCM.
5. Ignition OFF, disconnect the harness connector at the folding top cover pull down actuator.
6. Ignition ON, verify the scan tool Power Pull Down Ajar Status parameter is Closed. If not the specified value, test the signal circuit terminal E for a short to ground. If the circuit test normal, replace the BCM.
7. If all circuits test normal, test or replace the folding top cover latch actuator.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Folding Top Stowage Compartment Lid Latch Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system)
2. «Folding Top Cylinder Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system)
3. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for FTC module and BCM replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

When the power folding top is operated to open or close the folding top, the body control module (BCM) controls the folding top cover latch release operation through the folding top cover release relay control circuit and the tonneau release relay. The relay energizes and applies battery positive voltage to the folding top cover latch actuator. The circuit that generated this diagnostic trouble code (DTC) is the folding top cover release relay control circuit that is wired between the BCM and the tonneau release relay. The BCM applies a 12 volt low current voltage to this circuit to monitor the integrity of this circuit.

1. The FTC module must be powered and can not have B1327 or B1328 set as active DTCs for this DTC to set.
2. The BCM monitors the voltage of this circuit at all times even when the ignition is in the Off position.
3. The module voltage must be 9-16 volts.

1. Open detected in the relay control circuit.
2. Short to battery voltage detected in the relay control circuit.
3. Short to ground detected in the relay control circuit.
4. Open in the ground circuit of the tonneau release relay.

1. Current and history DTCs are stored.
2. Power folding top operation is disabled until the ignition is cycled OFF/Run ACC.

1. This DTC will clear on the current status after the condition for setting the fault is corrected.
2. A history DTC will clear after 50 consecutive ignition cycles without a fault present.

1. When using the scan tool, the folding top cover is referenced as the tonneau.
2. 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.
3. Whenever the open/close control switch is released or the top becomes inoperative in a suspended state, pressure will be maintained in the hydraulic system to avoid drifting and damage of components. After 4 minutes, the FTC module will gradually release the hydraulic pressure allowing the top to gradually settle to a resting position.

Schematic Reference

Folding Top Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Power Folding Top Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

When either the top open or top close control switch is pressed, the folding top cover should unlatch and rise to the open position. The scan tool Tonneau Latch Switch parameter should be Ajar.

1. Ignition OFF, disconnect the tonneau release relay.
2. Test for less than 5 ohms between the ground circuit terminal 86 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
3. Connect a test lamp between the control circuit terminal 85 and ground.
4. Cycle the ignition OFF and ON in order to reset the BCM.
5. Ignition ON, command the Tonneau Relay ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the BCM. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
6. If all circuits test normal, test or replace the tonneau release relay.

Tonneau Release Relay

1. Ignition OFF, disconnect the tonneau release relay.
2. Test for 60-120 ohms between terminals 85 and 86. If the resistance is not within the specified range, replace the relay.
3. Test for infinite resistance between the following terminals: 30 and 85 30 and 86 30 and 87 If not the specified value, replace the relay.
4. Install a 3A fused jumper wire between relay terminal 85 and B+. Install a jumper wire between relay terminal 86 and ground. Test for less than 2 ohms between terminals 30 and 87. If greater than the specified range, replace the relay.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Relay Replacement (Attached to Wire Harness)»(/chevrolet/corvette/c6-2004-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-introduction) or «Relay Replacement (Within an Electrical Center)»(/chevrolet/corvette/c6-2004-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-introduction)
2. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for FTC module and BCM replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The folding top control (FTC) module monitors the folding top pump motor temperature, checking the temperature once every 300 milliseconds. The FTC module supplies a 5-volt reference and monitors the sensor low reference voltage from the thermistor located in the folding top pump motor. As the pump motor warms up and the temperature increases, the thermistor resistance will increase. The FTC module monitors the voltage drop across the thermistor and uses it to calculate the temperature of the pump motor. When the FTC module detects that the temperature is above the maximum operating range, it will set this DTC.

1. The FTC module must be powered and can not have B1327 or B1328 set as active DTCs for this DTC to set. The battery voltage is between 9-16 volts.
2. The FTC module is in Accessory, RUN, or RAP.

1. The FTC module detects that the folding top pump motor temperature is greater than 115°C (239°F).
2. The FTC module detects that the folding top pump motor temperature is less than -20°C (-4°F) +/-5°C.

1. Stores a current and history DTC B3670 in the FTC module.
2. The FTC module will allow the top to be closed but not opened until the until the condition is cleared.
3. A class 2 message is sent to the driver information center, TOP MOTOR OVER TEMP, as the folding top switch is pressed.

1. This DTC will become history once the pump motor temperature is below 90°C (194°F).
2. A history DTC will clear after 50 consecutive ignition cycles without a fault present.

1. This DTC may set under normal operating conditions. Each time the folding top is moved to the open and closed positions it will cause the temperature of the pump motor to increase. Therefore, numerous cycles of the power folding top may raise the temperature to the point for which this DTC will set. Because this DTC can set under normal operating conditions, the following conditions must also be considered when diagnosing this DTC: High ambient temperature-A high ambient temperature will limit the number of times the system will operate. Low ambient temperature-A low ambient temperature will limit the number of times the system will operate.
2. This DTC may set in low temperature conditions that is below the recommended temperature for folding top operation. Refer to Pump Motor and Temperature Sensor in «Power Folding Top Description and Operation»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
3. The following conditions may cause an intermittent malfunction: An intermittent sticking or binding linkage condition can cause excessive current draw resulting in a temperature out of range. The folding top pump motor or thermistor is shorted internally.

Schematic Reference

Folding Top Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Power Folding Top Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for Scan Tool Information

1. Ignition OFF, disconnect the X431 inline harness connector.
2. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal B8 and ground. If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the FTC module. If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the FTC module.
3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal B8 and the signal circuit terminal B7. If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the FTC module. If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the FTC module.
4. If all circuits test normal, replace the folding top pump motor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Folding Top Pump with Motor Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system)
2. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for FTC module replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The body control module (BCM) supplies ignition voltage to the top open and top closed position switches. The folding top control (FTC) module monitors the signal circuits of these switches to determine the open and closed position of the top.

When the top is in the closed position the following definitions of the limit switches should be true

1. Top closed position switch - The switch is closed to voltage and the scan tool parameter should display Active.
2. Top open position switch - The switch is open and the scan tool parameter should display Inactive.

The FTC module must be powered and can not have B1327 or B1328 set as active DTCs for this DTC to set. The battery voltage is between 9-16 volts.

The FTC module will set B3971 as a current DTC if it senses that both the top open and top closed limit switches are active at the same time.

1. The FTC module disables all folding top functions.
2. If the condition occurs during operation of the folding top, once the top control switch is released, the FTC module will send a class 2 message to the driver information center (DIC), displaying TOP NOT SECURE.

1. This DTC will clear on the current status after the condition for setting the fault is corrected.
2. A history DTC will clear after 50 consecutive ignition cycles without a fault present.

Schematic Reference

Folding Top Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Power Folding Top Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. When the folding top is in the closed position, the top open switch is open and the scan tool Top Open Limit Switch parameter should be Inactive. If not the specified value, refer to the «Top Open Switch Test»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system__top-open-switch-test) .
2. When the folding top is in the open position, the top closed switch is open and the scan tool Top Closed Limit Switch parameter should be Inactive. If not the specified value, refer to the «Top Closed Switch Test»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system__top-closed-switch-test) .

Top Open Switch Test

1. Ignition OFF, disconnect the harness connector at the top open position switch.
2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal B and ground. If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
3. Ignition ON, verify the scan tool Top Open Limit Switch parameter is Inactive. If not the specified value, test the signal circuit terminal A for a short to voltage. If the circuit tests normal, replace the FTC module.
4. Install a 3A fused jumper wire between the ignition circuit terminal B and the signal circuit terminal A. Verify the scan tool Top Open Limit Switch parameter is Active. If not specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the FTC module.
5. If all circuits test normal, test or replace the top open position switch.

Top Closed Switch Test

1. Ignition OFF, disconnect the harness connector at the top closed position switch.
2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal B and ground. If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
3. Ignition ON, verify the scan tool Top Closed Limit Switch parameter is Inactive. If not the specified value, test the signal circuit terminal A for a short to voltage. If the circuit tests normal, replace the FTC module.
4. Install a 3A fused jumper wire between the ignition circuit terminal B and the signal circuit terminal A. Verify the scan tool Top Closed Limit Switch parameter is Active. If not specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the FTC module.
5. If all circuits test normal, test or replace the top closed position switch.

1. Ignition OFF, disconnect the harness connector at the appropriate top open or top closed position switch.
2. Test for infinite resistance between the signal terminal A and the ignition terminal B with the switch in the open position. If not the specified value, replace the switch
3. Test for less than 1 ohm between the signal terminal A and the ignition terminal B with the switch in the closed position. If greater than the specified range, replace the switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Folding Top Position Switch Replacement - Number 5 Bow»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system)
2. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for FTC module and BCM replacement, setup, and programming

Symptoms - Roof

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) , before using the Symptom Tables in order to verify that all of the following are true: There are no DTCs set. The control modules can communicate via the serial data link.
2. Review the system operation in order to familiarize yourself with the system functions. Refer to «Power Folding Top Description and Operation»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the folding top system. Refer to «Checking Aftermarket Accessories»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__checking-aftermarket-accessories) .
2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
3. Inspect the folding top hydraulic reservoir for the proper fluid level.

Intermittent

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

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

1. «DIC Warning Messages - Roof»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system__dic-warning-messages-roof)
2. «Folding Top Stowage Compartment Lid Release Inoperative»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system)
3. «Power Folding Top Does Not Close»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system)
4. «Power Folding Top Does Not Open»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system)
5. «Power Folding Top Inoperative»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system)

DIC Warning Messages - Roof

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

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 purpose of the folding top cover pull down actuator is to compress the folding top when its in the down position while the cover is being closed.

Battery positive voltage is supplied at all times to the folding top cover pull down actuator from the TONNEAU RELEASE Fuse located in the BCM fuse block. The pull down actuator is also provided with a control circuit, an ajar status circuit, and a ground circuit.

After the folding top cover latch actuator releases the cover, an internal switch in the actuator opens the control circuit to the pull down actuator commanding it to raise the striker. The pull down actuator will turn itself off once the striker is fully extended. Then with the striker in the extended position, the folding top cover pull down ajar signal circuit is pulled low signaling the BCM the ajar status of the pull down actuator. After the folding top is in the desired position, and the folding top cover is closed and latched, the internal switch in the latch actuator closes pulling the control circuit of the pull down actuator to ground, commanding it to retract the striker. The pull down actuator then reverses polarity of its motor to retract the striker in order to finish closing the cover.

1. When using the scan tool, the folding top cover is referenced as the tonneau.
2. Whenever the open/close control switch is released or the top becomes inoperative in a suspended state, pressure will be maintained in the hydraulic system to avoid drifting and damage of components. After 4 minutes, the FTC module will gradually release the hydraulic pressure allowing the top to gradually settle to a resting position.
3. If a repair is made to a signal circuit for a short to ground, test the component of that circuit for proper operation.
4. 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.

Schematic Reference

Folding Top Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Power Folding Top Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON, verify the folding top cover pull down actuator is not continuously moving up and down. If the pull down actuator continuously moves up and down, refer to the «Folding Top Cover Pull Down Ajar Test»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system__folding-top-cover-pull-down-ajar) .
2. If the folding top is in the open/stowed position, verify the scan tool Top Open Limit Switch parameter is Active. If not the specified value, refer to the «Top Open Switch Test»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
3. If the folding top cover is in the closed and latched position, verify the scan tool Tonneau Latch Switch parameter is Closed. If not the specified value, refer to the «Folding Top Cover Latch Ajar Switch Test»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system__folding-top-cover-latch-ajar-switch) .
4. During folding top operation when the sequence is reached for the folding top cover to open, the cover should unlatch. If the cover did not unlatch, refer to the «Folding Top Cover Latch Actuator and Relay Test»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system__folding-top-cover-latch-actuator-and) .
5. After the folding top cover opens, the folding top cover pull down actuator should extend to the raised position. If the pull down actuator did not extend to the raised position, refer to the «Folding Top Cover Pull Down Actuator Test»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system__folding-top-cover-pull-down-actuator) .
6. When the folding top cover reaches the closed position, the cover should latch. If the cover did not latch, refer to the «Folding Top Cover Pull Down Actuator Test»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system__folding-top-cover-pull-down-actuator) .
7. Once the folding top cover is closed and latched, the folding top cover pull down actuator should retract to the down position. If the pull down actuator did not retract, refer to the «Folding Top Cover Pull Down Actuator Test»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system__folding-top-cover-pull-down-actuator) .

Folding Top Cover Pull Down Ajar Test

1. Open the folding top cover. If needed use manual operation.
2. Ignition OFF, disconnect the harness connector at the folding top cover pull down actuator.
3. Test for less than 5 ohms between the ground circuit terminal D and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
4. Ignition ON, verify the scan tool Power Pull Down Ajar Status parameter is Closed. If not the specified value, test the signal circuit terminal E for a short to ground. If the circuit tests normal, replace the BCM.
5. Install a 3A fused jumper wire between the signal circuit terminal E and the ground circuit terminal D. Verify the scan tool Power Pull Down Ajar Status parameter is Ajar. If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the BCM.
6. Verify that a test lamp does not illuminate between the control circuit terminal B and B+. If the test lamp illuminates, test the control circuit for a short to ground.
7. If all circuits test normal, replace the folding top cover pull down actuator.

1. Ignition OFF, disconnect the harness connector at the top open switch.
2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal B and ground. If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
3. Verify the scan tool Top Open Limit Switch parameter is Inactive. If not the specified value, test the signal circuit terminal A for a short to voltage. If the circuit tests normal, replace the FTC module.
4. Install a 3A fused jumper wire between the signal circuit terminal A and the ignition circuit terminal B. Verify the scan tool Top Open Limit Switch parameter is Active. If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the FTC module.
5. If all circuits test normal, test or replace the top open switch.

Folding Top Cover Latch Ajar Switch Test

1. Ignition OFF, disconnect the X2 harness connector at the folding top cover latch actuator.
2. Test for less than 5 ohms between the ground circuit terminal B and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify the scan tool Tonneau Latch Switch parameter is Closed. If not the specified value, test the signal circuit terminal A for a short to ground. If the circuit tests normal, replace the BCM.
4. Install a 3A fused jumper wire between the signal circuit terminal A and the ground circuit terminal B. Verify the scan tool Tonneau Latch Switch parameter is Ajar. If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the BCM.
5. If all circuits test normal, replace the folding top cover latch actuator.

Folding Top Cover Latch Actuator and Relay Test

1. Ignition OFF, disconnect the tonneau release relay.
2. Test for less than 5 ohms between the ground circuit terminal 86 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp does not illuminate between the control circuit terminal 87 and ground. If the test lamp illuminates, test the control circuit for a short to voltage.
4. Verify that a test lamp illuminates between the B+ circuit terminal 30 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the B+ circuit fuse is open, test the control circuit terminal 87 for a short to ground. If the circuit tests normal, test or replace the folding top cover latch actuator.
5. Connect a test lamp between the control circuit terminal 85 and ground.
6. Cycle the ignition OFF and ON in order to reset the BCM.
7. Ignition ON, command the Tonneau Relay ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the BCM. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
8. Disconnect the X1 harness connector at the folding top cover latch actuator.
9. Test for less than 5 ohms between the ground circuit terminal 3 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
10. Connect the X1 harness connector at the folding top cover latch actuator.
11. Connect a 3A fused jumper wire between the B+ circuit terminal 30 and the control circuit terminal 87. Verify the folding top cover latch actuator is activated. If the folding top cover latch actuator does not activate, test the control circuit for an open/high resistance. If the circuit tests normal, test or replace the folding top cover latch actuator.
12. If all circuits test normal, test or replace the tonneau release relay.

Folding Top Cover Pull Down Actuator Test

1. Ignition ON, disconnect the harness connector at the folding top cover pull down actuator.
2. Test for less than 5 ohms between the ground circuit terminal D and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal A and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the B+ circuit fuse is open, test or replace the folding top cover pull down actuator.
4. Install a 3A fused jumper wire between the signal circuit terminal E and the ground circuit terminal D. Verify the scan tool Power Pull Down Ajar Status parameter is Ajar. If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the BCM.
5. Ignition OFF, connect the harness connector at the folding top cover pull down actuator. Disconnect the X2 harness connector at the folding top cover latch actuator.
6. Ignition ON, toggle a 3A jumper wire between the control circuit terminal C and ground. The pull down actuator should retract when the circuit is grounded and extend when the circuit is open. If the pull down actuator does not extend and retract, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the folding top cover pull down actuator.
7. If all circuits test normal, test or replace the folding top cover latch actuator.

Top Open Switch

1. Ignition OFF, disconnect the harness connector at the top open switch.
2. Test for infinite resistance between the signal terminal A and the B+ terminal B with the switch in the open position. If not the specified value, replace the top open switch.
3. Test for less than 1 ohm between the signal terminal A and the B+ terminal B with the switch in the closed position. If not the specified value, replace the top open switch.

1. Ignition OFF, disconnect the tonneau release relay.
2. Test for 60-120 ohms between terminals 85 and 86. If the resistance is not within the specified range, replace the relay.
3. Test for infinite resistance between the following terminals: 30 and 85 30 and 86 30 and 87 If not the specified value, replace the relay.
4. Install a 3A fused jumper wire between relay terminal 85 and B+. Install a jumper wire between relay terminal 86 and ground. Test for less than 2 ohms between terminals 30 and 87. If greater than the specified range, replace the relay.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Folding Top Stowage Compartment Lid Latch Striker Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system)
2. «Folding Top Stowage Compartment Lid Latch Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system)
3. «Folding Top Position Switch Replacement - Number 5 Bow»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system)
4. «Relay Replacement (Attached to Wire Harness)»(/chevrolet/corvette/c6-2004-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-introduction) or «Relay Replacement (Within an Electrical Center)»(/chevrolet/corvette/c6-2004-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-introduction)
5. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for FTC module and BCM replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The power folding top system uses seven different position or limit switches that provide input information to the FTC module. The FTC module uses this input information to determine the state and position of the folding top components. Then based on this input, the module then applies battery voltage to the appropriate control circuits to the folding top pump motor and the appropriate valves in order to control the hydraulic system used to operate the folding top.

1. Complete the check list, prior to performing the diagnosis: When the folding top control switch is pressed, check for driver information center (DIC) warning messages. Windows are normalized. Refer to «Power Window Reinitialization»(/chevrolet/corvette/c6-2004-2014/remont/heated-glassdefoggers/#fixed-and-moveable-window-system__power-window-reinitialization) . Luggage barrier is installed and secured, closing the luggage barrier switch. Vehicle is in PARK or the park brake is applied with manual transmission. Press the ignition to ACCY or RUN, with the engine OFF. Hydraulic fluid bypass valve in the operating position, turned clockwise, located above the pump motor. Pump operating temperature is between 18°C (0°F) and 95°C (199°F).
2. Whenever the open/close control switch is released or the top becomes inoperative in a suspended state, pressure will be maintained in the hydraulic system to avoid drifting and damage of components. After 4 minutes, the FTC module will gradually release the hydraulic pressure allowing the top to gradually settle to a resting position.
3. When using the scan tool, the folding top cover is referenced as the tonneau.
4. If a repair is made to a signal circuit for a short to ground, test the component of that circuit for proper operation.
5. 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.

Schematic Reference

Folding Top Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Power Folding Top Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON, press and continue to hold the folding top close switch, the folding top cover should unlatch. If the folding top cover did not unlatch, refer to «Folding Top Stowage Compartment Lid Release Inoperative»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
2. With the folding top cover unlatched, the cover should raise to the open position. If the folding top cover did not raise to the open position, refer to «Power Folding Top Inoperative»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system)
3. While the folding top cover is rising to the open position, the pull down actuator should extend to the up position. If it did not the extend to the up position, refer to «Folding Top Stowage Compartment Lid Release Inoperative»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
4. After the folding top cover opens, the scan tool Tonneau Open Limit Switch parameter should be Active. If not the specified value, refer to the «Folding Top Cover Open Switch Test»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
5. After the folding top has moved to the full up position, the scan tool Top Closed Limit Switch parameter should be Active. If not the specified value, refer to the Top Closed Switch Test «Top Closed Switch Test»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system)
6. With the 5 bow in the raised position, the scan tool 5 Bow Raised Pos. Switch parameter should be Active. If not the specified value, refer to the «5 Bow Raised Switch Test»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
7. The scan tool Power Pull Down Ajar Status parameter should be Active If not the specified value, refer to the «Folding Top Cover Pull Down Ajar Test»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
8. After the folding top cover closed and latched, the folding top cover pull down actuator should retract to the down position. If the folding top cover pull down actuator did not retract, refer to «Folding Top Stowage Compartment Lid Release Inoperative»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
9. After the pull down actuator retracts to the down position, the 1 bow should lower down onto the windshield. If the 1 bow did not lower down onto the windshield, refer to the «Valve 3 Test»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system__valve-3-test) .
10. With the 5 bow lowered, an audible chime should be heard indicating the top closing operation is complete. If the audible chime could not be heard, refer to the «5 Bow Lowered Switch Test»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .

1. Ignition OFF, disconnect the harness connector at the folding top cover open switch.
2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal B and ground. If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, test all switch signal circuits associated to the fuse for a short to ground.
3. Verify the scan tool Tonneau Open Limit Switch parameter is Inactive. If not the specified value, test the signal circuit terminal A for a short to voltage. If the circuit tests normal, replace the FTC module.
4. Install a 3A fused jumper wire between the signal circuit terminal A and the ignition circuit terminal B. Verify the scan tool Tonneau Open Limit Switch parameter is Active. If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the FTC module.
5. If all circuits test normal, test or replace the folding top cover open switch.

1. Ignition OFF, disconnect the harness connector at the top closed switch.
2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal B and ground. If the test lamp does not illuminate, test the ignition circuit for an open/high resistance.
3. Verify the scan tool Top Closed Limit Switch parameter is Inactive. If not the specified value, test the signal circuit terminal A for a short to voltage. If the circuit tests normal, replace the FTC module.
4. Install a 3A fused jumper wire between the signal circuit terminal A and the ignition circuit terminal B. Verify the scan tool Top Closed Limit Switch parameter is Active. If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the FTC module.
5. If all circuits test normal, test or replace the top closed switch.

1. Ignition OFF, disconnect the harness connector at the 5 bow raised switch.
2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal B and ground. If the test lamp does not illuminate, test the ignition circuit for an open/high resistance.
3. Verify the scan tool 5 Bow Raised Pos. Switch parameter is Inactive. If not the specified value, test the signal circuit terminal A for a short to voltage. If the circuit tests normal, replace the FTC module.
4. Install a 3A fused jumper wire between the signal circuit terminal A and the ignition circuit terminal B. Verify the scan tool 5 Bow Raised Pos. Switch parameter is Active. If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the FTC module.
5. If all circuits test normal, test or replace the 5 bow raised switch.

1. Open the folding top cover. If needed use manual operation.
2. Ignition OFF, disconnect the harness connector at the folding top cover pull down actuator.
3. Test for less than 5 ohms between the ground circuit terminal D and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
4. Ignition ON, verify the scan tool Power Pull Down Ajar Status parameter is Closed. If not the specified value, test the signal circuit terminal E for a short to ground. If the circuit tests normal, replace the BCM.
5. Install a 3A fused jumper wire between the signal circuit terminal E and the ground circuit terminal D. Verify the scan tool Power Pull Down Ajar Status parameter is Ajar. If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the BCM.
6. If all circuits test normal, replace the folding top cover pull down actuator.

Valve 3 Test

1. Ignition OFF, wait four minutes for the module to release the pressure in the hydraulic system.
2. Turn the hydraulic fluid by-pass valve counterclockwise to inhibit folding top movement.
3. Ignition OFF, disconnect the X431 inline harness connector at the folding top motor assembly.
4. Test for less than 5 ohms between the ground circuit terminal A3 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
5. Connect a test lamp between the control circuit terminal A6 and the ground circuit terminal A3.
6. Ignition ON, command the Valve 3 ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the module. If the test lamp is always OFF, test the control circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the FTC module.
7. If all circuits test normal, test or replace the folding top motor assembly.

1. Ignition OFF, disconnect the harness connector at the 5 bow lowered switch.
2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal B and ground. If the test lamp does not illuminate, test the ignition circuit for an open/high resistance.
3. Verify the scan tool 5 Bow Lowered Pos. Switch parameter is Inactive. If not the specified value, test the signal circuit terminal A for a short to voltage. If the circuit tests normal, replace the FTC module.
4. Install a 3A fused jumper wire between the signal circuit terminal A and the ignition circuit terminal B. Verify the scan tool 5 Bow Lowered Pos. Switch parameter is Active. If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the FTC module.
5. If all circuits test normal, test or replace the 5 bow lowered switch.

Top Closed Switch, 5 Bow Raised Switch, or 5 Bow Lowered Switch

1. Ignition OFF, disconnect the harness connector at the appropriate switch.
2. Test for infinite resistance between the signal terminal A and the ignition terminal B with the switch in the open position. If not the specified value, replace the top open switch.
3. Test for less than 1 ohm between the signal terminal A and the ignition terminal B with the switch in the closed position. If not the specified value, replace the inoperative switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Folding Top Pump with Motor Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system)
2. «Folding Top Stowage Compartment Lid Latch Striker Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system)
3. «Folding Top Cylinder Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system)
4. «Folding Top Position Switch Replacement - Number 5 Bow»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system)
5. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for FTC module and BCM replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The power folding top system uses seven different position or limit switches that provide input information to the FTC module. The FTC module uses this input information to determine the state and position of the folding top components. Then based on this input, the module then applies battery voltage to the appropriate control circuits to the folding top pump motor and the appropriate valves in order to control the hydraulic system used to operate the folding top.

1. Complete the check list, prior to performing the diagnosis: When the folding top control switch is pressed, check for driver information center (DIC) warning messages. Windows are normalized. Refer to «Power Window Reinitialization»(/chevrolet/corvette/c6-2004-2014/remont/heated-glassdefoggers/#fixed-and-moveable-window-system__power-window-reinitialization) . Luggage barrier is installed and secured, closing the luggage barrier switch. Vehicle is in PARK or the park brake is applied with manual transmission. Press the ignition to ACCY or RUN, with the engine OFF. Hydraulic fluid bypass valve in the operating position, turned clockwise, located above the pump motor. Pump operating temperature is between 18°C (0°F) and 95°C (199°F).
2. Whenever the open/close control switch is released or the top becomes inoperative in a suspended state, pressure will be maintained in the hydraulic system to avoid drifting and damage of components. After 4 minutes, the FTC module will gradually release the hydraulic pressure allowing the top to gradually settle to a resting position.
3. When using the scan tool, the folding top cover is referenced as the tonneau.
4. If a repair is made to a signal circuit for a short to ground, test the component of that circuit for proper operation.
5. 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.

Schematic Reference

Folding Top Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Power Folding Top Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON, observe the driver information center (DIC) while pressing and continuing to hold the folding top open switch. No warning messages should be displayed as a result of top operation. If warning messages are displayed, refer to «DIC Warning Messages - Roof»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system__dic-warning-messages-roof) .
2. Press and continue to hold the folding top open switch. After the 5 bow raised to the up position, observe the scan tool 5 Bow Raised Pos. Switch parameter, the reading should be Active. If not the specified value, refer to the «5 Bow Raised Switch Test»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
3. Observe the scan tool Top Closed Limit Switch parameter, the reading should be Active. If not the specified value, refer to the «Top Closed Switch Test»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
4. With the 5 bow in the raised position, the folding top cover should unlatch and rise to the open position. If the folding top cover did not unlatch, refer to «Folding Top Stowage Compartment Lid Release Inoperative»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) . If the folding top cover unlatched but did not rise to the open position, refer to the Valve 1 Test «Valve 1 Test»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system__valve-1-test)
5. With the folding top cover in the open position, observe the scan tool Tonneau Open Limit Switch parameter, the reading should be Active. If not the specified value, refer to the «Folding Top Cover Open Switch Test»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
6. After the folding top cover opened, the folding top cover pull down actuator should extend to the up position. If the pull down actuator did not extend to the up position, refer to «Folding Top Stowage Compartment Lid Release Inoperative»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
7. With the folding top in the stowed position observe the scan tool Top Open Limit Switch parameter, the reading should be Active. If not the specified value, refer to the «Top Open Switch Test»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
8. Observe the scan tool Power Pull Down Ajar Status parameter, the reading should be Ajar. If not the specified value, refer to the «Folding Top Cover Pull Down Ajar Test»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
9. After the folding top cover has closed and latched, the folding top cover pull down actuator should retract to the down position. If the folding top cover pull down actuator did not retract, refer to «Folding Top Stowage Compartment Lid Release Inoperative»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .

1. Ignition OFF, disconnect the harness connector at the 5 bow raised switch.
2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal B and ground. If the test lamp does not illuminate, test the ignition circuit for an open/high resistance.
3. Verify the scan tool 5 Bow Raised Pos. Switch parameter is Inactive. If not the specified value, test the signal circuit terminal A for a short to voltage. If the circuit tests normal, replace the FTC module.
4. Install a 3A fused jumper wire between the signal circuit terminal A and the ignition circuit terminal B. Verify the scan tool 5 Bow Raised Pos. Switch parameter is Active. If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the FTC module.
5. If all circuits test normal, test or replace the 5 bow raised switch.

1. Ignition OFF, disconnect the harness connector at the top closed switch.
2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal B and ground. If the test lamp does not illuminate, test the ignition circuit for an open/high resistance.
3. Verify the scan tool Top Closed Limit Switch parameter is Inactive. If not the specified value, test the signal circuit terminal A for a short to voltage. If the circuit tests normal, replace the FTC module.
4. Install a 3A fused jumper wire between the signal circuit terminal A and the ignition circuit terminal B. Verify the scan tool Top Closed Limit Switch parameter is Active. If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the FTC module.
5. If all circuits test normal, test or replace the top closed switch.

Valve 1 Test

1. Ignition OFF, wait four minutes for the module to release the pressure in the hydraulic system.
2. Turn the hydraulic fluid by-pass valve counterclockwise to inhibit folding top movement.
3. Ignition OFF, disconnect the X431 inline harness connector at the folding top motor assembly.
4. Test for less than 5 ohms between the ground circuit terminal A2 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
5. Connect a test lamp between the control circuit terminal A5 and the ground circuit terminal A2.
6. Ignition ON, command the Valve 1 ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the module. If the test lamp is always OFF, test the control circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the FTC module.
7. If all circuits test normal, replace the folding top motor assembly.

1. Ignition OFF, disconnect the harness connector at the folding top cover open switch.
2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal B and ground. If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, test all switch signal circuits associated to the fuse for a short to ground.
3. Verify the scan tool Tonneau Open Limit Switch parameter is Inactive. If not the specified value, test the signal circuit terminal A for a short to voltage. If the circuit tests normal, replace the FTC module.
4. Install a 3A fused jumper wire between the signal circuit terminal A and the ignition circuit terminal B. Verify the scan tool Tonneau Open Limit Switch parameter is Active. If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the FTC module.
5. If all circuits test normal, test or replace the folding top cover open switch.

1. Ignition OFF, disconnect the harness connector at the top open switch.
2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal B and ground. If the test lamp does not illuminate, test the ignition circuit for an open/high resistance.
3. Verify the scan tool Top Open Limit Switch parameter is Inactive. If not the specified value, test the signal circuit terminal A for a short to voltage. If the circuit tests normal, replace the FTC module.
4. Install a 3A fused jumper wire between the signal circuit terminal A and the ignition circuit terminal B. Verify the scan tool Top Open Limit Switch parameter is Active. If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the FTC module.
5. If all circuits test normal, test or replace the top open switch.

1. Open the folding top cover. If needed use manual operation.
2. Ignition OFF, disconnect the harness connector at the folding top cover pull down actuator.
3. Test for less than 5 ohms between the ground circuit terminal D and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
4. Ignition ON, verify the scan tool Power Pull Down Ajar Status parameter is Closed. If not the specified value, test the signal circuit terminal E for a short to ground. If the circuit tests normal, replace the BCM.
5. Install a 3A fused jumper wire between the signal circuit terminal E and the ground circuit terminal D. Verify the scan tool Power Pull Down Ajar Status parameter is Ajar. If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the BCM.
6. If all circuits test normal, replace the folding top cover pull down actuator.

Top Open Switch, Top Closed Switch, or 5 Bow Raised Switch

1. Ignition OFF, disconnect the harness connector at the appropriate switch.
2. Test for infinite resistance between the signal terminal A and the ignition terminal B with the switch in the open position. If not the specified value, replace the top open switch.
3. Test for less than 1 ohm between the signal terminal A and the ignition terminal B with the switch in the closed position. If not the specified value, replace the inoperative switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Folding Top Pump with Motor Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system)
2. «Folding Top Stowage Compartment Lid Latch Striker Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system)
3. «Folding Top Cylinder Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system)
4. «Folding Top Position Switch Replacement - Number 5 Bow»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system)
5. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for FTC module and BCM replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The folding top control switch is a rocker type switch that controls open and close functions of the power folding top. Battery positive voltage is supplied at all times to the switch from the REAR FOG/ALDL TOP SW fuse located in the body control module (BCM) fuse block. When the folding top switches are pressed, they send a 12 volt signal through the switch signal circuit to the folding top control (FTC) module indicating the top open or top close request. The FTC module then commands the folding top to move in response to the switch signal.

The power folding top system uses seven different position or limit switches that provide input information to the FTC module. The FTC module uses this input information to determine the state and position of the folding top components. Then based on this input, the module then applies battery voltage to the appropriate control circuits to the folding top pump motor and the appropriate valves in order to control the hydraulic system used to operate the folding top.

1. Complete the check list, prior to performing the diagnosis: When the folding top control switch is pressed, check for driver information center (DIC) warning messages. Windows are normalized. Refer to «Power Window Reinitialization»(/chevrolet/corvette/c6-2004-2014/remont/heated-glassdefoggers/#fixed-and-moveable-window-system__power-window-reinitialization) . Luggage barrier is installed and secured, closing the luggage barrier switch. Vehicle is in PARK or the park brake is applied with manual transmission. Press the ignition to ACCY or RUN, with the engine OFF. Hydraulic fluid bypass valve in the operating position, turned clockwise, located above the pump motor. Pump operating temperature is between 18°C (0°F) and 95°C (199°F). Whenever the open/close control switch is released or the top becomes inoperative in a suspended state, pressure will be maintained in the hydraulic system to avoid drifting and damage of components. After 4 minutes, the FTC module will gradually release the hydraulic pressure allowing the top to gradually settle to a resting position.
2. When using the scan tool, the folding top cover is referenced as the tonneau.
3. If a repair is made to a signal circuit for a short to ground, test the component of that circuit for proper operation.
4. 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.

Schematic Reference

Folding Top Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Power Folding Top Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON, verify the folding top cover pull down actuator is not continuously moving up and down. If the pull down actuator continuously moves up and down, refer to «Folding Top Stowage Compartment Lid Release Inoperative»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
2. Unlatch the header latch and verify the scan tool Header Latch Switch parameter is Unlatched. If not the specified value, refer to the «Header Latch Switch Test»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system__header-latch-switch-test) .
3. Ignition ON, observe the driver information center (DIC) while pressing the appropriate folding top open or close switch. No warning messages should be displayed as a result of top operation. If warning messages are displayed, refer to «DIC Warning Messages - Roof»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system__dic-warning-messages-roof) .
4. Attempt to open and close the folding top in either direction. If the top attempts to open, refer to «Power Folding Top Does Not Open»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) . If the top attempts to close, refer to «Power Folding Top Does Not Close»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
5. Verify the scan tool Driver Door Module Window Normalization parameter is Yes. If not the specified value, refer to «Power Window Reinitialization»(/chevrolet/corvette/c6-2004-2014/remont/heated-glassdefoggers/#fixed-and-moveable-window-system__power-window-reinitialization) .
6. Verify the scan tool Passenger Door Module Window Normalization parameter is Yes. If not the specified value, refer to «Power Window Reinitialization»(/chevrolet/corvette/c6-2004-2014/remont/heated-glassdefoggers/#fixed-and-moveable-window-system__power-window-reinitialization) .
7. While pressing either the open or close top control switch, verify the scan tool Top Control Switch parameter reading toggles between Open and Close. If not the specified value, refer to the «Folding Top Control Switch Test»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system__folding-top-control-switch-test) .
8. If the top is in the open position, the folding top cover should unlatch when the top close control switch is pressed. If the folding top cover did not unlatch, refer to «Folding Top Stowage Compartment Lid Release Inoperative»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
9. If all tests pass, refer to the «Folding Top Inoperative Test»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system__folding-top-inoperative-test) .

Header Latch Switch Test

1. Ignition OFF, disconnect the harness connector at the header latch switch.
2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal B and ground. If the test lamp does not illuminate, test the ignition circuit for an open/high resistance.
3. Verify the scan tool Header Latch Switch parameter is Unlatched. If not the specified value, test the signal circuit terminal A for a short to voltage. If the circuit tests normal, replace the BCM.
4. Install a 3A fused jumper wire between the signal circuit terminal A and the ignition circuit terminal B. Verify the scan tool Header Latch Switch parameter is parameter is Latched. If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the BCM.
5. If all circuits test normal, test or replace the header latch switch.

Folding Top Control Switch Test

1. Ignition OFF, disconnect the harness connector at the folding top control switch.
2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 4 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the B+ circuit fuse is open, test all components associated to the fuse for a short to ground.
3. Verify the scan tool Top Control Switch parameter is Inactive. If not the specified value, test the appropriate signal circuit terminal 2 or 5 for a short to voltage. If the circuit tests normal, replace the FTC module.
4. Install a 3A fused jumper wire between the signal circuit terminal 2 and the B+ circuit terminal 4. Verify the scan tool Top Control Switch parameter is Open. If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the FTC module.
5. Install a 3A fused jumper wire between the signal circuit terminal 5 and the B+ circuit terminal 4. Verify the scan tool Top Control Switch parameter is Close. If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the FTC module.
6. If all circuits test normal, test or replace the folding top control switch.

Folding Top Inoperative Test

1. Ignition OFF, wait four minutes for the module to release the pressure in the hydraulic system.
2. Manually open the folding top cover to access the hydraulic fluid bypass valve.
3. Turn the hydraulic fluid by-pass valve counterclockwise to inhibit folding top movement.
4. Disconnect the X431 inline harness connector at the folding top motor assembly.
5. Test for less than 5 ohms between the ground circuit terminals listed below and ground. A2 A3 B3 If greater than the specified range, test the ground circuit for an open/high resistance.
6. Ignition ON, test for less than 5 ohms between the control circuit terminals listed below and ground. A4 B4 If greater than the specified range, test the control circuit for an open/high resistance. If circuits test normal, replace the FTC module.
7. Connect a test lamp between control circuit terminal B4 and control circuit terminal A4.
8. Ignition ON, command Pump Motor A Direction and Pump Motor B Direction with a scan tool. The test lamp should turn ON when commanding the Pump Motor A Direction and Pump Motor B Direction states. If the test lamp remains OFF during either of the commands, test for a short to ground on either control circuit. If the circuits test normal, replace the FTC module.
9. Connect a test lamp between the control circuit terminal B6 and the ground circuit terminal B3.
10. Ignition ON, command Valve 3 ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the module. If the test lamp is always OFF, test the control circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the FTC module.
11. If all circuits test normal, test or replace the folding top motor assembly.

Header Latch Switch

1. Ignition OFF, disconnect the harness connector at the header latch switch.
2. Test for infinite resistance between the signal terminal A and the ignition terminal B with the switch in the open position. If not the specified value, replace the header latch switch.
3. Test for less than 1 ohm between the signal terminal A and the ignition terminal B with the switch in the closed position. If not the specified value, replace the header latch switch.

1. Ignition OFF, disconnect the harness connector at the folding top control switch.
2. Test for infinite resistance between the signal terminal 2 and the B+ terminal 4 with the switch in the open position. If not the specified value, replace the folding top control switch.
3. Test for less than 1 ohm between the signal terminal 2 and the B+ terminal 4 with the switch in the closed position. If not the specified value, replace the folding top control switch.
4. Test for infinite resistance between the signal terminal 5 and the B+ terminal 4 with the switch in the open position. If not the specified value, replace the folding top control switch.
5. Test for less than 1 ohm between the signal terminal 5 and the B+ terminal 4 with the switch in the closed position. If not the specified value, replace the folding top control switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Folding Top Pump with Motor Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system)
2. «Folding Top Switch Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system)
3. «Folding Top Front Locating Pin Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system)
4. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for FTC module replacement, setup, and programming

Scheme 7

Scheme 8

Scheme 9

Scheme 10

Scheme 11

Scheme 12

Scheme 13

Scheme 14

Removal Procedure

1. Remove the weatherstrip and the retainer from the rear side rail. Refer to «Folding Top Side Front Weatherstrip Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) and «Folding Top Side Front Weatherstrip Retainer Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
2. Raise the top cover flap and remove the screw (1) attaching tension cable to the rear side rail.
3. Position the top with the #1 bow and the #5 bow up.
4. Remove the headliner screws (1) from the #1 bow.
5. Remove the tension cable end from the #1 bow.
6. Attach approximately 5 feet of 16-gauge wire to aid in the installation.
7. From the rear of the top remove the tension cable, leaving the wire in the top pocket.
8. Disconnect the tension cable from the wire.

Installation Procedure

1. Pull the wire forward until the cable is in the proper position. Remove the wire.
2. Attach the tension cable end to the #1 bow.
3. Install the headliner screws (1) to the #1 bow Tighten: Tighten the screw to 2 N.m (18 lb in).
4. Install the tension cable screw to the rear side rail. Tighten: Tighten the screw to 2 N.m (18 lb in).
5. Fold the top cover flap over the rear side rail.
6. Install the rear side weatherstrip retainer and the weatherstrip to the rear side rail. Refer to «Folding Top Side Front Weatherstrip Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) and «Folding Top Side Front Weatherstrip Retainer Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .

1. Remove the screws (1) from the top retainer.
2. Remove the compression seal panel from the number 1 bow. Refer to «Folding Top Seal Compression Panel Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
3. Remove both side rail weatherstrips and retainers.
4. Remove the tension cable. Refer to «Folding Top Cover Side Tension Cable Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
5. Remove the top material from the number 5 bow.
6. Disconnect rear window heated glass electrical connection.
7. Pull top material out of the number 2, 3 and 4 bows.

1. Slide the top cover through the roof bows (2, 3, 4).
2. Attach the rear window electrical connector.
3. Attach the top cover to the number 5 (5) bow by pressing seam into the number 5 bow groove.
4. Install tension cable. Refer to «Folding Top Cover Side Tension Cable Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
5. Install both side rail weatherstrips and retainers.
6. Install the screws (1) to the top retainer. Tighten: Tighten the screw to 2 N.m (18 lb in).
7. Install compression seal panel. Refer to «Folding Top Seal Compression Panel Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .

1. Position the folding top with the #1 and #5 bow up.
2. Remove the screws (1) securing the end of the string fasteners to the headliner retainer bracket (2) on both sides of the vehicle.
3. Remove the screws (1) located at the end of the glare cover at the #5 bow.
4. Remove the push in fasteners (2) securing the glare cover to the #5 bow.
5. Remove the cover from the vehicle.

1. Position the glare cover to the #5 Bow.
2. Install the push in fasteners (2) in order to secure the glare cover to the #5 bow.
3. Install the screws (1) to secure the ends of the glare cover to the #5 bow. Tighten: Tighten the screws to 2 N.m (18 lb in).
4. Route the string fasteners as noted in the removal procedure.
5. Install a screw (1) to secure the end of the string fastener to the headliner retainer bracket on both sides of the vehicle. Tighten: Tighten the screws to 2 N.m (18 lb in).
6. Ensure proper operation of the folding top.

Scheme 15

1. Open the folding top stowage compartment lid.
2. Remove the screws attaching the lower sides of the extension panel.
3. Remove the screws attaching the top of the extension panel.
4. Remove the panel upward from the bracket.

1. Position the extension panel to the bracket with the latch manual release cable extending out from under the panel.
2. Install the bolts attaching the extension panel to the bracket. Tighten: Tighten the extension panel bolts to 4 N.m (35 lb in).
3. Closed the folding top stowage compartment lid.

Scheme 16

Scheme 17

Note. The stowage lid and the rear compartment lid will contact if they are opened at the same time. Be sure that one lid is latched at all times.

1. Open the rear compartment.
2. Remove the rear nut attaching the folding top stowage lid hinge.
3. Disconnect the right and left folding top stowage lid struts from the rear of the hinges.
4. Close the rear compartment.
5. Open the folding top stowage lid and support the lid.
6. Place a protective cover between the stowage lid and the rear compartment lid, and over the top of the quarter panels.
7. Using a grease pencil mark the location of the hinge on the lid to aid in installation.
8. Remove the nuts attaching the front of the hinge to the body.
9. Remove the hinge bolts from the lid.
10. Remove the hinge.

1. Position the hinge to the stud plate on the body.
2. Install the nut attaching the hinge to the front of the body stud plate. Tighten: Tighten the folding top stowage lid hinge to body nut to 32 N.m (23 lb ft).
3. Install the hinge bolts to the lid. Tighten: Tighten the folding top stowage lid hinge to lid bolts to 25 N.m (18 lb ft).
4. Install the strut to the front ball stud on the hinge.
5. Remove the protective covering and the temporary support.
6. Lower and latch the folding top stowage lid.
7. Open the rear compartment.
8. Install the nut attaching the hinge to the rear of the body stud plate. Tighten: Tighten the folding top stowage lid hinge to body nut to 32 N.m (23 lb ft).
9. Install the folding top stowage lid struts to the hinges.
10. Inspect the operation of the rear compartment lid.

Special Tools

BO-47666 Hose Retainer Ring Installer. See Special Tools .

Replacement Procedure

1. Place the folding top in the #1 and #5 bow in the up position.
2. Open the rear compartment.
3. Disconnect the battery. Refer to «Battery Negative Cable Disconnection and Connection (LS7 or LS9)»(/chevrolet/corvette/c6-2004-2014/remont/charging-system/#battery-charging-system-starting-system) or «Battery Negative Cable Disconnection and Connection (LS3)»(/chevrolet/corvette/c6-2004-2014/remont/charging-system/#battery-charging-system-starting-system) .
4. Locate the hydraulic pump beneath the carpet in the storage compartment on the passenger side of the rear compartment.
5. Turn the hydraulic pump bypass valve (1) counterclockwise until the valve stops.
6. Support the rear compartment lid.
7. Place a protective cover over the rear compartment interior and the adjacent body panels.
8. Remove the side compartment trim carpet. Refer to «Rear Compartment Rear Center Trim Panel Carpet Replacement»(/chevrolet/corvette/c6-2004-2014/remont/exteriorinterior-trim/#floor-coverings-and-headlinings) .
9. Disconnect the electrical connectors (1) from the folding top control module (2).
10. Remove the nuts from the hydraulic pump bracket.
11. Lift the pump up and out of the storage compartment and set the pump on the protective covering.
12. Remove the hydraulic cylinder from the mounting location. Do NOT remove the hoses from the cylinder at this time.
13. Remove the reservoir filler plug (1).
14. Identify the hose numbers to be replaced.
15. Remove the bolts (1) from the pump manifold plate.
16. Carefully lift up on the manifold plate (1).
17. Locate the pair of cylinder hoses that need replacement. Refer to «Folding Top Hydraulic Cylinder Hose Identification»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
18. For each set of hoses being replaced, remove one hose by pulling straight up from the pump. Use a clean shop towel to control any hydraulic fluid leakage.
19. Push the hose back through the manifold plate.
20. Remove the hose retaining ring (1).
21. Remove the hose (1) from the manifold plate (2).
22. Push the manifold end of the new hose (1) through the manifold plate (2).
23. Using the BO-47666 , install a new hose-retaining ring onto the hoses. See «Special Tools»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
24. Push the assembly cone (2) over the end of the hose (1) until the cone is fully seated.
25. Install the retaining ring (2) onto the assembly cone (1).
26. Using the BO-47666 (2), push the retaining ring (1) into place. See «Special Tools»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
27. Remove the assembly cone (1).
28. Repeat the replacement procedure for the second hose.
29. Install a new O-ring (1) on each cylinder hose that you removed from the pump manifold.
30. Align the manifold plate bolt holes to the holes on the pump. This will ensure that the cylinder hoses are placed in the correct port.
31. Align the cylinder hoses into each port and push down until the hoses are seated properly in the hydraulic pump manifold.
32. Install the manifold plate bolts (1). Do NOT tighten.
33. Push down on the manifold plate (1) and verify that all of the cylinder hoses are seated properly. Tighten: Tighten the bolts to 10 N.m (89 lb in).
34. Route the new hose set to the cylinder in the same way as the set being replaced.
35. Depending on the hose set, you may have to remove and replace the following components: The tie wraps The P-clips The wire loom The conduit
36. Use a small flat-bladed tool to release the retainer clip (1) from one of the cylinder hoses.
37. Remove the retainer clip (1).
38. Remove the cylinder hose (1). Use a clean shop towel to control any hydraulic fluid leakage.
39. Remove the cylinder hose O-ring (1) from the cylinder.
40. Install a new O-ring (1) onto the cylinder hose (2).
41. Install the hose into the cylinder port (3). Press straight down on the hose until the hose is fully seated in the cylinder.
42. Install a new cylinder hose retainer clip (1). Inspect the retainer clip to ensure that the clip is fully seated around the hose (2).
43. Repeat the replacement procedure for the second hose.
44. Install the appropriate hydraulic cylinder to the mounting location.
45. Install the reservoir filler plug (1).
46. Position the hydraulic pump to the correct mounting location.
47. Apply LOCTITE™ Blue, GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the bracket bolts. Tighten: Tighten the bolts to 18 N.m (13 lb ft).
48. Connect the electrical connectors (1) to the folding top control module (2).
49. Install the electrical connectors (1) to the hydraulic pump bracket.
50. Install the rear compartment carpet. Refer to «Rear Compartment Rear Center Trim Panel Carpet Replacement»(/chevrolet/corvette/c6-2004-2014/remont/exteriorinterior-trim/#floor-coverings-and-headlinings) .
51. Remove the protective covering.
52. Turn the pump bypass valve (1) clockwise until the valve stops.
53. Connect the battery. Refer to «Battery Negative Cable Disconnection and Connection (LS7 or LS9)»(/chevrolet/corvette/c6-2004-2014/remont/charging-system/#battery-charging-system-starting-system) or «Battery Negative Cable Disconnection and Connection (LS3)»(/chevrolet/corvette/c6-2004-2014/remont/charging-system/#battery-charging-system-starting-system) .
54. Remove the rear compartment lid support.
55. Close the rear compartment.
56. Bleed the hydraulic system. Refer to «Folding Top Hydraulic System Bleeding Procedure»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system__folding-top-hydraulic-system-bleeding-procedure) .
57. Inspect the hydraulic system for fluid leaks.
58. Inspect the hydraulic system fluid level and add fluid as needed. Refer to «Folding Top Fluid Addition»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system__folding-top-fluid-addition) .
59. Inspect the folding top for proper operation. Refer to «Power Folding Top Description and Operation»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .

1. Open the folding top to fully open position.
2. Place a protective covering over the interior of the vehicle and the adjacent body panels.
3. Using a grease pencil, mark the location of the striker.
4. Remove the upper garnish molding. Refer to «Windshield Upper Garnish Molding Replacement»(/chevrolet/corvette/c6-2004-2014/remont/exteriorinterior-trim/#interior-trim-and-paneling) .
5. Remove the locating striker screws (1). Note the location and the amount of any shims that may be present.
6. If doing the left side striker, disconnect the electrical connector.
7. Remove the striker from the windshield header.

1. Install the same shims in the original locations.
2. Position the striker to the windshield header (3).
3. Install the striker screws. Do NOT tighten.
4. Install the electrical connector to the striker on the left only.
5. Position the folding top panel so that the panel is resting unlatched on the windshield header, with the locating pins in the strikers.
6. Manually latch the folding top. Apply pressure to the locating pin so that the rubber bumper is contacting the striker.
7. Open the folding top. Tighten: Tighten the bolts to 8 N.m (71 lb in).
8. Close the folding top while inspecting the alignment of the locating pin to the striker. Close and latch the folding top.
9. Remove the protective covering.
10. Cycle the folding top one complete cycle in both directions.
11. Inspect the folding top for proper operation.

Scheme 18

Scheme 19

1. Place the folding top with the #1 bow and #5 bow in the up position.
2. Open the stowage compartment lid (1).
3. Turn the ignition key to the OFF position.
4. Remove the folding top stowage compartment lower carpet (2) to expose the control module. Refer to «Rear Compartment Floor Panel Carpet Replacement (Convertible)»(/chevrolet/corvette/c6-2004-2014/remont/exteriorinterior-trim/#floor-coverings-and-headlinings) or «Rear Compartment Floor Panel Carpet Replacement (Coupe)»(/chevrolet/corvette/c6-2004-2014/remont/exteriorinterior-trim/#floor-coverings-and-headlinings) in Interior Trim. Disconnect the electrical connectors (3) from the folding top control module (2).
5. Remove the control module (4) by lifting up to release the hook and loop fastener.

1. Connect the electrical connectors (3) to the folding top control module (4).
2. Install the folding top stowage compartment carpet (2). Refer to «Rear Compartment Floor Panel Carpet Replacement (Convertible)»(/chevrolet/corvette/c6-2004-2014/remont/exteriorinterior-trim/#floor-coverings-and-headlinings) or «Rear Compartment Floor Panel Carpet Replacement (Coupe)»(/chevrolet/corvette/c6-2004-2014/remont/exteriorinterior-trim/#floor-coverings-and-headlinings) in interior Trim.
3. Close the stowage compartment lid (1).
4. Inspect the folding top for proper operation. Refer to «Power Folding Top Description and Operation»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
5. Refer to «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for programming and setup information.

Scheme 20

Scheme 21

1. Using a heat gun heat the protector/molding to soften the adhesive.
2. Lift upward to remove the protector.
3. Remove all old adhesive from the lid depression by using 3M™ adhesive remover P/N 8984 or equivalent.
4. Clean the surface with a 50/50 mixture of isopropyl alcohol and water.
5. Dry the surface with a clean cloth.

1. Using a heat gun preheat the adhesive on the new protector.
2. Peel the backing from the protector.
3. Position the protector inside the lid depression with the ends of the protector flush with the forward edge of the lid.
4. Press the protector firmly into the lid depression.

1. Place the folding top with the #1 and #5 bow in the up position.
2. Folding top will bleed down pressure after approximately four minutes of non use.
3. Open the rear compartment.
4. Disconnect the battery. Refer to «Battery Negative Cable Disconnection and Connection (LS7 or LS9)»(/chevrolet/corvette/c6-2004-2014/remont/charging-system/#battery-charging-system-starting-system) or «Battery Negative Cable Disconnection and Connection (LS3)»(/chevrolet/corvette/c6-2004-2014/remont/charging-system/#battery-charging-system-starting-system) .
5. Place a protective covering over the rear compartment interior and the adjacent body panels.
6. Remove the rear compartment side carpet. Refer to «Rear Compartment Rear Center Trim Panel Carpet Replacement»(/chevrolet/corvette/c6-2004-2014/remont/exteriorinterior-trim/#floor-coverings-and-headlinings) .
7. Locate the hydraulic pump beneath the carpet in the storage compartment on the passenger side of the rear compartment.
8. Support the rear compartment lid.
9. Remove the electrical connector (1) from the hydraulic pump bracket.
10. Disconnect the 2 electrical connectors (1) from the folding top control module (2).
11. Remove the nuts (1) from the hydraulic pump bracket.
12. Lift the pump up and out of the storage compartment and set the pump on the protective covering.
13. Remove the reservoir filler plug (1).
14. Remove the bolts (1) from the pump manifold plate.
15. Disengage the cylinder hoses by pulling straight up on the hoses.
16. Carefully lift up on the manifold plate (1).
17. Remove the hoses by pulling the hoses straight up from the pump. Use a clean shop towel to control any hydraulic fluid leakage.
18. Remove the hydraulic pump from the vehicle.
19. Remove the O-ring (1) from each hose.

1. Install a new O-ring (1) on each cylinder hose.
2. Align the manifold plate bolt holes to the holes on the new pump. This will ensure that the cylinder hoses are placed in the correct port.
3. Align the cylinder hoses into each port and push down until the hoses are seated properly in the hydraulic pump manifold.
4. Install the manifold plate bolts (1). Do NOT tighten.
5. Push down on the manifold plate (1) and verify that all of the cylinder hoses are seated properly. Tighten: Tighten the bolts to 10 N.m (89 lb in)
6. Install the reservoir filler plug (1).
7. Position the hydraulic pump to the mounting location.
8. Apply Loctite® Blue, GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the bolts.
9. Install the nuts (1) to the hydraulic pump bracket. Tighten: Tighten the nuts to 18 N.m (13 lb ft).
10. Connect the electrical connectors (1) to the folding top control module.
11. Install the 3 electrical connectors (1) to the hydraulic pump bracket (2).
12. Add fluid as needed. Refer to «Folding Top Fluid Addition»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system__folding-top-fluid-addition) .
13. Install the rear compartment carpet. Refer to «Rear Compartment Rear Center Trim Panel Carpet Replacement»(/chevrolet/corvette/c6-2004-2014/remont/exteriorinterior-trim/#floor-coverings-and-headlinings) .
14. Remove the protective covering.
15. Connect the battery. Refer to «Battery Negative Cable Disconnection and Connection (LS7 or LS9)»(/chevrolet/corvette/c6-2004-2014/remont/charging-system/#battery-charging-system-starting-system) or «Battery Negative Cable Disconnection and Connection (LS3)»(/chevrolet/corvette/c6-2004-2014/remont/charging-system/#battery-charging-system-starting-system) .
16. Remove the rear compartment lid support.
17. Close the rear compartment.
18. Bleed the hydraulic system. Refer to «Folding Top Hydraulic System Bleeding Procedure»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system__folding-top-hydraulic-system-bleeding-procedure) .
19. Inspect the hydraulic system for fluid leaks.
20. Inspect the hydraulic system fluid level and add fluid as needed. Refer to «Folding Top Fluid Addition»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system__folding-top-fluid-addition) .
21. Inspect the folding top for proper operation. Refer to «Power Folding Top Description and Operation»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .

Scheme 22

Scheme 23

Scheme 24

Scheme 25

1. Roll back the front and rear corners of the top cover. Refer to «Folding Top Cover Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
2. Position the folding top with the number one bow and the number five bow up, to access fasteners and minimize tension on pins and linkage.
3. Remove the number two and three link spring flex clips (1).
4. Remove the number two and three link pins (2).
5. Remove the number two and three link.

1. Install the number two and three link.
2. Install the number two and three link pins (2).
3. Install the number two and three link spring flex clips (1).
4. Install the front and rear corners of the top cover. Refer to «Folding Top Cover Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
5. Ensure that the folding top is in alignment with the door windows.

1. Roll back the front and rear corners of the top cover. Refer to «Folding Top Cover Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
2. Position the folding top with the number one bow and the number five bow up, to access fasteners and minimize tension on pins and linkage.
3. Remove the number three and four link spring flex clips (1).
4. Remove the number three and four link pins (2).
5. Remove the clip from the three and four link (3).
6. Remove the number three and four link (4).

1. Install the number three and four link (4).
2. Install the clip to the three and four link (3).
3. Install the number three and four link pins (1).
4. Install the three and four link spring flex clips (2).
5. Install the front and rear corners of the top cover. Refer to «Folding Top Cover Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
6. Ensure that the folding top is in alignment with door windows.

1. Roll back the front and rear corners of the top cover. Refer to «Folding Top Cover Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
2. Position the folding top with the number one bow and the number five bow up, to access fasteners and minimize tension on pins and linkage.
3. Remove the number five link spring flex clip (1).
4. Remove the number five link pin (2).
5. Disconnect the pivot ball from the five link (3).
6. Remove the number five link (4).

1. Install the number five link (4).
2. connect the pivot ball to the five link (3).
3. Install the number five pin (2).
4. Install the five spring flex clip (1).
5. Install the front and rear corners of the top cover. Refer to «Folding Top Cover Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
6. Ensure that the folding top is in alignment with door windows.

Scheme 26

1. Position the top with the #1 bow and the #5 bow up, and open the stowage compartment.
2. Grasp the clock spring with vice grips or pliers, and remove the spring end from the roof link pin.
3. Remove the nut.
4. Remove the clock spring and the pin.

1. Install the flat washer, the bushing, and the gripper washer to the clock spring pin.
2. Install the clock spring with pin to the arm.
3. Install the clock spring nut. Tighten: Tighten the nut to 4 N.m (35 lb in).
4. Grasp the end of the clock spring with vice grips or pliers.
5. Wind the clock spring and insert the end of the spring into the roof link pin.
6. Reposition the folding top to the original position.

Scheme 27

1. Open the folding top stowage compartment.
2. Remove the forward end of the strut from the hinge ball stud.
3. Close the folding top stowage compartment lid.
4. Open the rear stowage compartment lid.
5. Remove the strut from the rear ball stud.

1. Open the rear stowage compartment lid.
2. Position the rod end of the strut through the access hole between the quarter panel and the support.
3. Install the strut to the rear ball stud.
4. Close the rear stowage compartment.
5. Open the folding top stowage compartment.
6. Install the rod end of the strut to the front of the hinge.
7. Close the folding top stowage compartment.

Scheme 28

1. Position the folding top with the number 1 bow and the number 5 bow up.
2. Open the folding top stowage lid. If necessary, you can open the stowage lid manually by pulling on the manual release cable.
3. Remove the lid release switch (1) with a flat-bladed tool.
4. Disconnect the harness (2) from the switch.

1. Connect the harness (2) to the lid release switch.
2. Align the electrical harness to the slot in the rear compartment lid.
3. Install the lid release switch to the rear compartment lid, pressing until fully seated.
4. Check for the proper operation of the lid switch.
5. Position the folding top to the original position.

Scheme 29

Scheme 30

Folding Top Fluid Addition

1. Park the vehicle on a level surface.
2. Place the folding top in the up position.
3. Open the rear compartment.
4. Locate the hydraulic pump beneath the carpet in the storage compartment on the passengers side of the rear compartment.
5. Place a protective covering over the rear compartment interior and the adjacent body panels.
6. Place a shop towel around the pump motor to control any hydraulic fluid spillage.
7. Remove the reservoir filler plug (1)
8. Add fluid P/N 89022748 until the fluid level is between the MAXIMUM and the MINIMUM indicator lines on the reservoir.
9. Install the reservoir filler plug (1). Tighten: Tighten the plug to 2 N.m (18 lb in).
10. Remove the shop towel.
11. Remove the protective covering.
12. Close the rear compartment.
13. Cycle the folding top under power through one complete cycle in both directions.
14. Place the folding top in the up position.
15. Open the rear compartment.
16. Inspect the fluid level and add fluid as necessary.
17. Install the carpet over the hydraulic pump.
18. Remove the protective covering.
19. Close the rear compartment.
20. Inspect the folding top for proper operation. Refer to «Power Folding Top Description and Operation»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .

Pressure Link- Five Bow Pressure on Stowage Lid

Note. If working on a power top, locate the hydraulic pump bypass valve bolt on the front side turn it counterclockwise one revolution.

Adjust the lower pressure link to change the #5 bow pressure to the stowage compartment lid.

1. Decrease the pressure if the top material is contacting and marring the lid.
2. Increase the pressure if water is leaking between the top and the lid.

1. Position the folding top with the #1 bow and the #5 bow up.
2. Loosen the jamb nut (1) on the pressure link where the adjuster attaches to the #5 bow.
3. Mark the pressure link large adjustment nut (2) to aid in determining the amount of adjustment.
4. Adjust the pressure link by rotating the large adjustment nut (2) one turn at a time.
5. Rotate the large adjustment nut (2) clockwise to increase the downward pressure of the #5 bow on the stowage lid. Turn the jamb nut (1) counter clockwise to decrease the downward pressure.
6. Raise the top.
7. Check the gap between the lid (2) and the #5 bow top cover material (1). The gap between the lid and the top material should be 5 mm (0.2 in). The gap between the five bow top material and the lid should be the same all the way across.
8. Check the alignment of the front latch pins with their receivers. The front latch pins should be aligned so that when the top is raised the pins drop into the receivers.
9. Lower the top and re-adjust the pressure link as necessary.
10. Position the folding top with the #1 bow and the #5 bow up.
11. Tighten the jamb nut (1). Tighten: Tighten the nut to 14 N.m (10 lb ft).
12. Raise and close the folding top to ensure proper alignment.
13. Water test the folding top. Refer to «Waterleak Test Preparation»(/chevrolet/corvette/c6-2004-2014/remont/exterior-body-panels/#waterleaks__waterleak-test-preparation) .

Stopper Adjustment

Adjust top parallel side to side.

1. Lower the folding top.
2. Remove the body lock pillar upper trim to grain access the stopper.
3. Loosen the adjuster jamb nut (2).
4. Mark the adjuster nut to aid in determining the amount of adjustment.
5. Loosen the adjustment stopper (1), turn the nut one turn at a time.
6. Raise and check the top for proper adjustment, readjust as needed.
7. Check the alignment of the front latch pins with their receivers. The front latch pins should be aligned so that when the top is raised the pins drop into the receivers.
8. Lower and re-adjust the top using the adjuster as necessary.
9. Tighten the jamb nut. Tighten: Tighten the nut to 12 N.m (9 lb ft).
10. Ensure that all the top adjustments are tighten and the power top works properly.
11. Water test the folding top. Refer to «Waterleak Test Preparation»(/chevrolet/corvette/c6-2004-2014/remont/exterior-body-panels/#waterleaks__waterleak-test-preparation) .

1. Position the number 1 bow and the number 5 bow in an up position.
2. Open top stowage compartment lid.
3. Remove the lock pillar upper trim panel. Refer to «Body Lock Pillar Trim Panel Replacement»(/chevrolet/corvette/c6-2004-2014/remont/exteriorinterior-trim/#interior-trim-and-paneling)
4. Disconnect the rear defogger electrical connections at the seat belt tower.
5. Remove pivot bracket brace.
6. Remove the folding top pivot bracket bolts with an assistant.
7. With an assistant, slide the top slightly up and then rearward and out of the pillar bracket pin.

1. With an assistant, position the folded top to the vehicle with the top pivot bracket resting on the pillar bracket pin.
2. Ailing bolt holes by inserting a drift pin in the alignment hole (1).
3. Install pivot bracket brace.
4. Install the pivot bracket bolts.
5. Install the folding top bolts to the body in the mandatory sequence 1, 2, 3. Tighten: Tighten the bolts to 25 N.m (18 lb ft).
6. Connect the rear defogger electrical connections.
7. Close and latch the top.
8. Install the lock pillar trim panel. Refer to «Body Lock Pillar Trim Panel Replacement»(/chevrolet/corvette/c6-2004-2014/remont/exteriorinterior-trim/#interior-trim-and-paneling) .
9. Check top for proper operation.
10. Water test the folding top.

Note. The power folding top is serviced as a complete assembly. Folding top cover, frame, hydraulic pump and folding top control module are all included in the service part assembly.

1. Position the #1 bow and the #5 bow in an up position.
2. Open the folding top stowage lid.
3. Disconnect the battery. Refer to «Battery Negative Cable Disconnection and Connection (LS7 or LS9)»(/chevrolet/corvette/c6-2004-2014/remont/charging-system/#battery-charging-system-starting-system) or «Battery Negative Cable Disconnection and Connection (LS3)»(/chevrolet/corvette/c6-2004-2014/remont/charging-system/#battery-charging-system-starting-system) .
4. Remove the stowage compartment carpet. Refer to «Rear Compartment Rear Center Trim Panel Carpet Replacement»(/chevrolet/corvette/c6-2004-2014/remont/exteriorinterior-trim/#floor-coverings-and-headlinings) .
5. Disconnect the rear defogger electrical connections at the seat belt tower.
6. Disconnect the electrical connector from the hydraulic pump bracket.
7. Disconnect the stowage lid hydraulic cylinders from the hinge. Refer to «Folding Top Cylinder Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
8. Open the fold-over clips (1) that retain the electrical harness and hydraulic hoses to the floor.
9. Remove folding top control module. Refer to «Folding Top Control Module Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
10. Remove the hydraulic pump nuts (1).
11. Remove the folding top pillar bracket bolts with an assistant.
12. With an assistant, slide the top slightly up and then rearward and out of the pivot bracket.
13. Remove the folding top assembly.

1. With an assistant, position the folded top to the vehicle with the top resting on the pivot bracket pin.
2. Insert a drift pin into the alignment hole (1) to align bolt holes.
3. Remove the drift pin.
4. Install the folding top bolts to the body in the mandatory sequence 1,2,3. Tighten: Tighten the bolts to 25 N.m (18 lb ft).
5. Install the hydraulic pump nuts (1). Tighten: Tighten the nuts to 10 N.m (89 lb in).
6. Install the folding top control module. Refer to «Folding Top Control Module Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
7. Install the folding top stowage lid hydraulic cylinders. Refer to «Folding Top Cylinder Replacement»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
8. Install the electrical harness and hydraulic hose fold-over clips (1) to the floor. Fold the clips over to retain the electrical harness and hydraulic hoses.
9. Connect the electrical connector to the hydraulic pump.
10. Connect the rear defogger electrical connections.
11. Install the rear compartment carpet. Refer to «Rear Compartment Rear Center Trim Panel Carpet Replacement»(/chevrolet/corvette/c6-2004-2014/remont/exteriorinterior-trim/#floor-coverings-and-headlinings) .
12. Connect the battery. Refer to «Battery Negative Cable Disconnection and Connection (LS7 or LS9)»(/chevrolet/corvette/c6-2004-2014/remont/charging-system/#battery-charging-system-starting-system) or «Battery Negative Cable Disconnection and Connection (LS3)»(/chevrolet/corvette/c6-2004-2014/remont/charging-system/#battery-charging-system-starting-system) .
13. Close and latch the top.
14. Inspect the top for proper operation. Refer to «Power Folding Top Description and Operation»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .
15. Water test the folding top.

1. Position the #1 bow and the #5 bow up.
2. Open the folding top stowage compartment lid.
3. Remove the retainer from the lock pillar end of the seal.
4. Pull the molded end of the seal from the lock pillar.
5. Pull the weatherstrip from the stowage compartment flange.

1. Apply a bead of sealer, GM P/N 12345739 or Canadian P/N 10953472, or equivalent to the front seal surface of the lock pillar stowage compartment and to the surround flange.
2. Remove the paper backing from the adhesive on the bottom of the molded ends of the weatherstrip.
3. Position the molded ends of the weatherstrip to the lock pillars.
4. Tuck the outboard lip of the seal underneath the flange of the quarter panels.
5. Secure the molded ends of the weatherstrip with the retainers.
6. Firmly secure the weatherstrip to the stowage compartment flange.
7. Close the folding top stowage compartment.
8. Reposition the folding top to the original position.

Folding Top Hydraulic System Bleeding Procedure

1. Inspect the fluid level and add fluid as necessary. Refer to «Folding Top Fluid Addition»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system__folding-top-fluid-addition) .
2. Start the vehicle.
3. Cycle the folding top under power through one complete cycle in both directions.
4. Inspect the fluid level again and add more fluid as necessary. Refer to «Folding Top Fluid Addition»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system__folding-top-fluid-addition) .
5. Cycle the folding top under power through 5 complete cycles in both directions. Allow 5 minutes between each cycle.
6. Inspect the folding top for proper operation. Refer to «Power Folding Top Description and Operation»(/chevrolet/corvette/c6-2004-2014/remont/sun-rooft-topconvertible-top/#folding-top-system) .

Manually Moving the Folding Top from the Down Position

1. Manually release the folding top cover latch using the emergency release cable.
2. Raise the folding top stowage cover.
3. Manually raise the folding top, holding the 5 bow up.
4. Manually lower and latch the folding top stowage cover.
5. Manually unfold the top and latch per normal procedure.

Manually Moving the Folding Top from the Up Position

1. Manually release header latch per normal operation.
2. Manually lift front of roof off of the header and raise the #5 bow at the same time.
3. Manually release the Folding Top Cover latch using the emergency release cable.
4. Fold the roof down into the well.
5. Manually close and latch the folding top stowage cover.

The power folding top system consists of the following components

1. Folding top control (FTC) module
2. Body control module (BCM)
3. Folding top control switch
4. Serial data communication
5. Folding top cover latch actuator
6. Folding top cover pull down actuator
7. Folding top pump motor with valve manifold
8. 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
9. Tonneau release relay
10. TONNEAU PULL DOWN ACTUATOR Fuse 20 A
11. TONNEAU RELEASE Fuse 10 A
12. BATT 2 Fuse 40 A
13. REAR FOG/ALDL TOP SW Fuse 10 A
14. 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

Power and Grounds

Battery positive voltage is supplied at all times to the folding top control (FTC) module through the battery positive voltage circuit from the BATT 2 fuse located in the under hood fuse block. Ground is provided to the FTC module through the module ground circuit and G302.

Battery positive voltage is supplied at all times to the tonneau release relay through the battery positive voltage circuit and the TONNEAU RELEASE fuse located in the body control module (BCM). Ground is provided to the relay through the ground circuit and G202.

The folding top cover latch actuator has 2 separate ground circuits from G301. One provides a ground for latch actuator operation and the other provides a ground for the latch ajar signal and the folding top cover pull down control.

Battery positive voltage is supplied at all times to the folding top cover pull down actuator through the battery positive voltage circuit and the TONNEAU PULL DOWN ACTUATOR fuse located in the BCM. Ground is provided to the pull down actuator through the ground circuit and G302.

The folding top control switch is a rocker type switch that controls open and close functions of the power folding top. Battery positive voltage is supplied at all times to the switch from the REAR FOG/ALDL TOP SW fuse located in the body control module (BCM) fuse block. When the folding top switches are pressed they send a 12 volt signal through the switch signal circuit to the folding top control (FTC) module. The FTC module then commands the folding top to move in response to the switch signal.

Folding Top Control Module

The folding top control (FTC) module when commanded controls the opening and closing of the power folding top through input information from folding top position switches, top limit switches and class 2 messages from the door control modules and body control module. The FTC module is capable of determining the state of all moving components of the folding top system at any time during an open or close operation. Also through input information, the module can make corrections in the position of components when necessary while continuing in the direction indicated by the folding top control switch.

The FTC module can stop operation or reverse direction during any point of operation when you change the direction of the control switch. To avoid an inadvertent operation of the folding top system when the top is fully open or closed, a 0.75 second delay occurs after the activation of the control switch before the FTC module activates the pump motor and the folding top valves. When the system is activated from a suspended state, the response time is less than 60 ms.

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.

Folding Top Cover Pull Down Actuator

The purpose of the folding top cover pull down actuator is to compress the folding top when it is in the down position while the cover is being closed.

Battery positive voltage is supplied at all times to the folding top cover pull down actuator from the TONNEAU RELEASE Fuse located in the BCM fuse block. The pull down actuator is also provided with a control circuit, an ajar status circuit, and a ground circuit.

After the folding top cover latch actuator releases the cover, an internal switch in the actuator opens the control circuit to the pull down actuator commanding it to raise the striker. The pull down actuator will turn itself off once the striker is fully extended. Then with the striker in the extended position, the folding top cover pull down ajar signal circuit is pulled low signaling the BCM the ajar status of the pull down actuator. After the folding top is in the desired position, and the folding top cover is closed and latched, the internal switch in the latch actuator closes pulling the control circuit of the pull down actuator to ground, commanding it to retract the striker. The pull down actuator then reverses polarity of its motor to retract the striker in order to finish closing the cover.

Folding Top Position or Limit Switches

The power folding top system uses seven different position or limit switches that provide input information to the folding top control (FTC) module. The FTC module uses this input information to determine the state and position of the folding top components. When the switches are closed, battery voltage is applied through the switch signal circuit to the FTC module indicating the position of the component. The following is a list of the position switches and their defined state with the power folding top in the CLOSED position

1. Pin receiver switch: closed
2. Top open switch: open
3. Top closed switch: closed
4. 5 Bow raised switch: open
5. 5 Bow lowered switch: closed
6. Luggage barrier switch: open or closed, must be closed for the top to operate.
7. Folding top cover open switch: open, this switch is an internal part of the stowage lid hydraulic cylinder.

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

1. Unlatch the header. The FTC module reads the pin receiver switch is Inactive.
2. The windows must be normalized. Refer to «Power Window Reinitialization»(/chevrolet/corvette/c6-2004-2014/remont/heated-glassdefoggers/#fixed-and-moveable-window-system__power-window-reinitialization) .
3. The ignition must be placed in Accessory or RUN.
4. The transmission must be placed in PARK, or with manual transmission, the park brake must be applied.
5. Trunk status must not be ajar.
6. The luggage barrier must be in place.
7. The pump motor temperature must be within the operating range.

The sequence for opening the folding top is as follows

1. Manually unlatch the header. The FTC module reads the pin receiver switch is Inactive.
2. Hold the open/close control switch to the OPEN request position.
3. The folding top status changes to opening.
4. A message is sent to disable the windows from operating using the door switches.
5. The windows open using the express open mode.
6. The 1 bow and 5 bow are raised.
7. A message is sent to the body control module (BCM) to unlatch the folding top cover.
8. The BCM sends folding top cover latch ajar message via class 2 serial data line.
9. The folding top cover opens.
10. The folding top cover pull down striker is extended.
11. The BCM sends folding top cover pull down ajar message via class 2 serial data line.
12. The top retracts to the open position and is stowed in the rear compartment.
13. The folding top cover closes.
14. The BCM sends folding top cover latch not ajar message via class 2 serial data line.
15. The windows are enabled and an audible chime is heard.
16. The folding top cover pull down retracts.
17. The top status changes from CLOSED to OPEN.

The sequence for closing the folding top is as follows

1. Hold the open/close control switch in the CLOSE request position.
2. The folding top status changes to closing.
3. A message is sent to disable the windows from operating using the door switches.
4. The windows open using the express open mode.
5. A class 2 message is sent to the BCM to unlatch the folding top cover.
6. The BCM sends folding top cover latch ajar message via class 2 serial data line.
7. The folding top cover opens.
8. The folding top cover pull down striker is extended.
9. The BCM sends folding top cover pull down ajar message via class 2 serial data line.
10. The top closes.
11. The 1 bow and 5 bow are raised.
12. The folding top cover closes.
13. The folding top cover pull down retracts.
14. The 1 bow and 5 bow are lowered.
15. Manually latch the header. The FTC module reads that the pin receiver switch is Active.
16. The top status changes from Open to Closed and a chime tone is heard.
17. The windows are enabled.
18. 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.

Hydraulic Control

The folding top control (FTC) module also controls the hydraulic system used to operate the folding top by controlling the On/Off state and direction of the hydraulic pump motor, and the open/closed state of each of the valves in the system. The FTC module has the ability to operate the hydraulic pump and all three folding top valves simultaneously and independently. The three folding top valves controlled by the FTC module move the following components

1. Folding top cover
2. Folding top
3. 1 bow
4. 5 bow

The folding top cover is controlled by the pump by-pass 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 FTC module will release the hydraulic pressure by cycling the folding top valves ON and OFF. This allows the top to gradually settle to a resting position.

Pump Motor and Temperature Sensor

The folding top control (FTC) module continuously monitors the state of health of the pump motor through the temperature sensor signal circuit and the temperature sensor (thermistor) that is attached to the pump motor. The module supplies a 5-volt reference to the temperature sensor only after initial FTC module wake up and during top operation. The temperature sensor is a variable resistor and it's resistance changes as the temperature of the motor changes. If the FTC module senses a temperature between the pump motor pre-alarm setting and pump motor alarm setting, the current open or close operation shall be completed, but new top operation will not be allowed until the pump motor cools below the pre-alarm setting. If the temperature reaches the pump motor alarm value, the FTC module will allow the top to be closed but not opened until the condition is cleared. If the FTC module detects a low temperature value, top operation will not be allowed, and the module will send a warning message to the driver information center (DIC) indicating that the temperature is too cold for top operation. The pump motor temperature settings are

1. Too high pre-alarm of 105°C (221°F)
2. Too high alarm of 115°C (239°F)
3. Too cold for folding top operation of 20°C (-4°F)

Driver Notification

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

1. TOP MOTOR OVER TEMPERATURE: If the pump motor temperature is above the set operating range.
2. TOO COLD FOR TOP OPERATION: If the pump motor temperature is below the set operating range.
3. ATTACH TRUNK PARTITION: If the luggage barrier is not in place and top operation is attempted.
4. SHIFT TO PARK TO MOVE TOP or SET PARK BRAKE TO MOVE TOP: If the power mode is in RUN, but the transmission is not in PARK or the park brake is not applied and top operation is attempted.
5. TONNEAU AJAR: If the folding top cover is not latched and the transmission is not in PARK or the park brake is not applied.
6. TOP NOT SECURE: If the top open/close switch is released before an open or close operation is complete, or if the gear selector is taken out of PARK or the park brake is released.
7. UNLATCH HEADER TO MOVE TOP: If the top control switch is activated in the top open direction and the header is latched.
8. CLOSE TRUNK TO MOVE TOP: If the top control switch is activated and the trunk is not in the closed position.

Default Operation

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 module 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 module will then operate the system as requested.

Power Folding Top Manual Operation

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. Refer to Folding Top Manual Operation .

Illustration Tool Number/Description BO-47666 Hose Retainer Ring Installer

Scheme 31

See also:
• Diagnostic System Check - Vehicle
• Strategy Based Diagnosis
• Diagnostic Procedure Instructions
• Component Connector End Views
• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs
• Control Module References
• Diagnostic Repair Verification
• Relay Replacement (Attached to Wire Harness)
• Checking Aftermarket Accessories
• Trunk Ajar Indicator Malfunction (Coupe)
• Brake Warning Indicator Malfunction
• Starter Solenoid Does Not Click
• Power Window Reinitialization
• Folding Top Headlining Trim Panel Replacement
• Fastener Caution
• Eye Protection Warning
• Folding Top Hydraulic Pressure Warning
• Servicing Electrical Components Warning
• Cylinder Hoses Caution
• Rear Compartment Rear Center Trim Panel Carpet Replacement
• Windshield Upper Garnish Molding Replacement
• Waterleak Test Preparation
• DTC B1011
• 5 Bow Raised Switch Test
• 5 Bow Lowered Switch Test
• Folding Top Cover Open Switch Test
• Folding Top Cover Latch Test
• Top Open Switch Test
• Top Closed Switch Test
• DIC Warning Messages - Roof
• Folding Top Cover Pull Down Ajar Test
• Folding Top Cover Latch Ajar Switch Test
• Folding Top Cover Latch Actuator and Relay Test
• Folding Top Cover Pull Down Actuator Test
• Valve 3 Test
• Valve 1 Test
• Header Latch Switch Test
• Folding Top Control Switch Test
• Folding Top Inoperative Test
• Folding Top Fluid Addition
• Folding Top Hydraulic System Bleeding Procedure