Diagnostic Instructions
| • | Perform the Diagnostic Starting Point - Roof prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Folding Top Control Module Battery Voltage | 1 | 1 | -- | -- |
Folding Top Control Module Control | B1420 | B1420 | -- | -- |
Folding Top Control Module Ground | -- | 1, 2 | -- | -- |
Folding Top Control Switch Battery Voltage | 2 | 2 | -- | -- |
Folding Top Control Switch Close Signal | 2 | 2 | B3602 | -- |
Folding Top Control Switch Open Signal | 2 | 2 | B3602 | -- |
Front Tonneau Position Sensor 5-Volt Reference | B3665, B3666, B3971 | B3665 | B3665, B3666, B3670, B3971 | -- |
Front Tonneau Position Sensor Signal | B3665 | B3665 | B3665 | -- |
Front Tonneau Position Sensor Low Reference | -- | B3665 | -- | -- |
Folding Top Position Sensor 5-Volt Reference | B3665, B3666, B3971 | B3971 | B3665, B3666, B3670, B3971 | -- |
Folding Top Position Sensor Signal | B3971 | B3971 | B3971 | -- |
Folding Top Position Sensor Low Reference | -- | B3971 | -- | -- |
Rear Tonneau Position Sensor 5-Volt Reference | B3665, B3666, B3971 | B3666 | B3665, B3666, B3670, B3971 | -- |
Rear Tonneau Position Sensor Signal | B3666 | B3666 | B3666 | -- |
Rear Tonneau Position Sensor Low Reference | -- | B3666 | -- | -- |
Folding Top Pump Motor Thermal Sensor 5-Volt Reference | B3665, B3666, B3971 | 2, 7 | B3665, B3666, B3670, B3971 | -- |
Folding Top Pump Motor Signal | 2, 7 | 2, 7 | B3670 | -- |
Hard Top Connected Signal | B1420 | 4, 7 | B1310 | -- |
Folding Top Closed Switch Control | B1420 | 4, 7 | -- | -- |
Header Latched Switch Signal | B1420, 3, 4, 7 | 3, 4, 7 | B1300 | -- |
Header Latched Switch Control | B1420 | 3, 4, 7 | -- | -- |
Header Unlatched Switch Signal | B1420, 9 | 9 | B1300 | -- |
Header Unlatched Switch Control | B1420 | 9 | -- | -- |
Luggage Barrier Switch Signal | B1420, 2, 7 | 2, 7 | 8 | -- |
Luggage Barrier Switch Control | B1420 | 2, 7 | -- | -- |
Pump Direction A Control | B1011 | 2 | -- | -- |
Pump Direction B Control | B1011 | 2 | -- | -- |
Rear Compartment Lid Open Switch Signal | B1420, 3, 4 | 3, 4 | B3669 | -- |
Rear Compartment Lid Open Switch Control | B1420 | 3, 4 | -- | -- |
Valve 1 Control | 1 | 3 | -- | -- |
Valve 1 - Ground | -- | 3 | -- | -- |
Valve 2 Control | 1 | 4 | -- | -- |
Valve 2 - Ground | -- | 4 | -- | -- |
Valve 3 Control | 1 | 3, 4, 6 | -- | -- |
Valve 3 - Ground | -- | 3, 4, 6 | -- | -- |
Valve 4 Control | 1 | B1297, 3, 4, 5 | -- | -- |
Valve 4 - Ground | -- | B1297, 3, 4, 5 | -- | -- |
Valve 5 Control | 1 | 2 | -- | -- |
Valve 5 - Ground | -- | 2 | -- | -- |
1. No communication with the folding top control module 2. Power folding top is inoperative 3. Power folding top does not open or complete the top opening procedure 4. Power folding top does not close or complete the top closing procedure 5. Rear Compartment lid will not open 6. Rear compartment lid will not close 7. DIC warning message displayed 8. Folding top will operate with the luggage barrier removed 9. No effect on power folding top operation | ||||
Circuit/System Description
The power folding top system uses seven different position or limit switches and three position sensors 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. Then based on these inputs, the module 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.
Diagnostic Aids
| • | 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. |
| - | Luggage barrier is installed and secured, closing the luggage barrier switch. |
| - | Vehicle is in PARK. |
| - | 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. |
| - | Operating temperature is normal. |
| • | 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 folding top module will gradually release the hydraulic pressure allowing the top to gradually settle to a resting position. |
| • | When using the scan tool, the Rear Compartment Lid is referenced as the Deck Lid. |
| • | If a repair is made to a signal circuit for a short to ground, test the component of that circuit for proper operation. |
| • | Using the scan tool to access the History parameters for the folding top module, will display the last status of the items listed. |
Reference Information
Schematic Reference
Connector End View Reference
Power Roof Systems Connector End Views
Description and Operation
Power Folding Top Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for Scan Tool Information
Circuit/System Verification
- Ignition ON, observe the driver information center (DIC) while pressing the appropriate top open or close switch. No warning messages should be displayed as a result of top operation.
- Regardless of the tops position, attempt to open or close the folding top. The top should not move in the commanded direction.
- While pressing the top open and top close control switches, verify the scan tool Top Control Switch parameter toggles between Top Open, Top Closed and Idle.
- Verify the scan tool Driver Door Module Window Normalization parameter is Yes.
- Verify the scan tool Passenger Door Module Window Normalization parameter is Yes.
- If all tests pass, refer to the Folding Top Inoperative Test.
| ⇒ | If the DIC displays Close Cargo Cover, refer to the Luggage Barrier Switch Test. |
| ⇒ | If the DIC displays Valet Active Top Inop, refer to the Valet Switch Test. |
| ⇒ | If the DIC displays Too Cold to Move Top, refer to the Thermal Sensor Test. |
| ⇒ | If the top attempts to open then stops, refer to Power Folding Top Does Not Open. |
| ⇒ | If the top attempts to close then stops, refer to Power Folding Top Does Not Close. |
| ⇒ | If not the specified values, refer to the Folding Top Control Switch Test. |
| ⇒ | If not the specified value, refer to Power Windows Description and Operation. |
| ⇒ | If not the specified value, refer to Power Windows Description and Operation. |
Circuit/System Testing
Luggage Barrier Switch Test
- Ignition OFF, disconnect the harness connector at the luggage barrier switch.
- Ignition ON, verify that a test lamp illuminates between the control circuit terminal A and ground.
- Verify the scan tool Luggage Barrier Limit Switch parameter is Open.
- Install a 3A fused jumper wire between the signal circuit terminal B and the control circuit terminal A. Verify the scan tool Luggage Barrier Limit Switch parameter is Closed.
- If all circuits test normal, test or replace the luggage barrier switch.
| ⇒ | If the test lamp does not illuminate, test the control circuit for short to ground or an open/high resistance. |
| ⇒ | If not the specified value, test the signal circuit terminal B for a short to voltage. If the circuit tests normal, replace the folding top module. |
| ⇒ | If not the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the folding top module. |
Valet Switch Test
- Ignition OFF, disconnect the harness connector at the valet switch.
- Test for less than 1 ohm between the ground circuit terminal A and ground.
- Verify the scan tool HVAC Valet Switch parameter is Inactive.
- Install a 3A fused jumper wire between the signal circuit terminal B and ground. Verify the scan tool HVAC Valet Switch parameter is Active.
- If all circuits test normal, test or replace the valet switch.
| ⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
| ⇒ | If not the specified value, test the signal circuit terminal B for a short to ground. If the circuit tests normal, replace the HVAC control module. |
| ⇒ | If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the HVAC control module. |
Thermal Sensor Test
- Ignition OFF, disconnect the harness connector at the folding top pump motor thermal sensor.
- Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal D and ground.
- Verify the scan tool Pump Motor Temp. Sensor parameter is less than 38 Counts.
- Install a 3A fused jumper wire between the signal circuit terminal C and the 5-volt reference circuit terminal D. Verify the scan tool Pump Motor. Sensor parameter is greater than 242 Counts.
- If all circuits test normal, test or replace the pump and valve assembly.
| ⇒ | 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 folding top 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 folding top module. |
| ⇒ | If greater than the specified range, test the signal circuit terminal C for a short to voltage. If the circuit tests normal, replace the folding top module. |
| ⇒ | 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 folding top module. |
Folding Top Control Switch Test
- Ignition OFF, disconnect the harness connector at the folding top control switch.
- Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 4 and ground.
- Verify the scan tool Top Control Switches parameter is Idle.
- Connect a 3A fused jumper wire between the signal circuit terminal 1 and the B+ circuit terminal 4. Verify the scan tool Top Control Switches parameter is Top Open
- Connect a 3A fused jumper wire between the signal circuit terminal 2 and the B+ circuit terminal 4. Verify the scan tool Top Control Switches parameter is Top Closed
- If all circuits test normal, test or replace the folding top control switch.
| ⇒ | If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. |
| ⇒ | If not the specified value, test the signal circuits terminal 1 and terminal 2 for a short to voltage. If the circuits test normal, replace the folding top module. |
| ⇒ | If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the folding top module. |
| ⇒ | If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the folding top module. |
Folding Top Inoperative Test
- Ignition OFF, disconnect the C1 harness connector at the folding top module.
- Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal A and ground.
- Verify that a test lamp illuminates between the ground circuit terminal B and B+.
- Ignition OFF, connect the C1 harness connector at the folding top module and disconnect the harness connector at the folding top pump motor.
- Connect a test lamp between control circuit terminal A and control circuit terminal B.
- Ignition ON, command 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 in the A and B directions.
- Ignition OFF, disconnect the harness connector at valve 3.
- Verify that a test lamp illuminates between the ground circuit terminal 2 and B+.
- Connect a test lamp between the control circuit terminal 1 and ground.
- 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.
- Ignition OFF, disconnect the harness connector at valve 4.
- Verify that a test lamp illuminates between the ground circuit terminal 2 and B+.
- Connect a test lamp between the control circuit terminal 1 and ground.
- Ignition ON, command Valve 4 ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
- Ignition OFF, disconnect the harness connector at valve 5.
- Verify that a test lamp illuminates between the ground circuit terminal 2 and B+.
- Connect a test lamp between the control circuit terminal 1 and ground.
- Ignition ON, command Valve 5 ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
- If all circuits test normal, test or replace the pump and valve assembly.
| ⇒ | If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. |
| ⇒ | If the test lamp does not illuminate, test the ground circuit for an open/high resistance. |
| ⇒ | If the test lamp remains OFF during either of the commands, test the control circuits for a short to ground or an open/high resistance. If the circuits test normal, replace the folding top module. |
| ⇒ | If the test lamp does not illuminate, test the ground circuit for an open/high resistance. |
| ⇒ | 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 folding top module. |
| ⇒ | If the test lamp does not illuminate, test the ground circuit for an open/high resistance. |
| ⇒ | 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 folding top module. |
| ⇒ | If the test lamp does not illuminate, test the ground circuit for an open/high resistance. |
| ⇒ | 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 folding top module. |
Component Testing
Folding Top Control Switch
- Ignition OFF, disconnect the harness connector at the folding top control switch.
- Test for infinite resistance between the signal terminal 1 and the B+ terminal 4 with the switch in the open position.
- Test for less than 1 ohm between the signal terminal 1 and the B+ terminal 4 with the switch in the closed position.
- Test for infinite resistance between the signal terminal 2 and the B+ terminal 4 with the switch in the open position.
- 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. |
| ⇒ | If not the specified value, replace the folding top control switch. |
| ⇒ | If not the specified value, replace the folding top control switch. |
| ⇒ | If not the specified value, replace the folding top control switch. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Important: Perform the Power Folding Top Learn after component replacement.
| • | Control Module References for folding top module and HVAC control module replacement, setup, and programming |
