Power Folding Top Malfunction
Power Folding Top Malfunction
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
Diagnostic Fault Information
Circuit/System Description
The operation of the convertible top is semi-automatic. The user of the vehicle manually latches and unlatches the convertible top while hydraulic power actuation provides the force to raise and lower the top. The folding top control switch is a rocker type switch that controls open and close functions of the power folding top. The folding top control module commands the folding top to move in response to the switch signal. Based on the switch input, the module applies voltage to the appropriate controls circuits of the folding top pump motor in order to control the hydraulic system used to operate the folding top.
Diagnostic Aids
Complete the check list, prior to performing the diagnosis:
* Scan tool must remain connected and turned on to keep K23 folding top module active during diagnostics.
* Vehicle is in PARK or the park brake is applied with manual transmission.
* Hydraulic fluid bypass valve in the operating position, turned clockwise, located above the pump motor.
* Pump operating temperature is between 0°C (32°F) and 70°C (158°F).
* Luggage barrier is installed and secured, activating the folding top luggage barrier sensor.
* 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.
Reference Information
Schematic Reference
Folding Top Schematics [1][2]Convertible Top
Connector End View Reference
Component Connector End Views Fuel Pump and Level Sensor Assembly
Description and Operation
Power Folding Top Description and Operation Power Folding Top
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
Scan Tool Reference
Control Module References Control Module References for scan tool information
Circuit/System Verification
1. Ignition ON, observe the scan tool Folding Top Open Switch Signal and Folding Top Close Switch Signal parameters while operating the folding top control switch to the open and close positions. The parameters should change between Active and Inactive.
• If the parameters do not change between the commanded states, refer to Folding Top Control Switch Malfunction.
2. Observe the scan tool Header Latch Switch parameter while unlatching and latching the power folding top. The parameter should change between Latched and Unlatched.
• If the parameter does not change between the commanded states, refer to Header Latch Switch Malfunction.
3. Observe the scan tool Luggage Barrier Sensor Signal parameter while connecting and removing the luggage barrier bar. The parameter should change between Active and Inactive.
• If the parameter does not change between the commanded states, refer to Luggage Barrier Sensor Malfunction.
4. Observe the scan tool Folding Top Stowed Sensor Signal parameter while fully opening and closing the power folding top. The parameter should change between Active and Inactive.
• If the parameter does not change between the commanded states, refer to Folding Top Position Sensor Malfunction.
5. Command the power folding top open and close with the folding top control switch. The power folding top should fully open and close when commanded.
• If the power folding top does not fully open and close when commanded, refer to Power Folding Top Motor Malfunction.
Circuit/System Testing
Folding Top Control Switch Malfunction
1. Ignition OFF, disconnect the harness connector at the S22B folding top control switch.
2. Ignition OFF, test for less than 10 ohms between the low reference circuit terminal 3 and ground.
• If greater than the specified range, test the low reference circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K23 folding top control module.
3. Ignition ON, test for B+ between the signal circuit terminal 1 and ground.
• 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 K23 folding top control module.
4. Test for B+ between the signal circuit terminal 4 and ground.
• 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 K23 folding top control module.
5. Ignition ON, verify that a test lamp does not illuminate between the signal circuit terminal 1 and ground.
• If the test lamp illuminates, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K23 folding top control module.
6. Verify that a test lamp does not illuminate between the signal circuit terminal 4 and ground.
• If the test lamp illuminates, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K23 folding top control module.
7. If all circuits test normal, replace the S22B folding top control switch.
Header Latch Switch Malfunction
1. Ignition OFF, disconnect the harness connector at the B140 folding top header latch position switch.
2. Ignition OFF, test for less than 10 ohms between the low reference circuit terminal B and ground.
• If greater than the specified range, test the low reference circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K23 folding top control module.
3. Ignition ON, test for B+ between the signal circuit terminal A and ground.
• 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 K23 folding top control module.
4. Ignition ON, verify that a test lamp does not illuminate between the signal circuit terminal A and ground.
• If the test lamp illuminates, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K23 folding top control module.
5. If all circuits test normal, replace the B140 folding top header latch position switch.
Luggage Barrier Sensor Malfunction
Note: A test lamp connected between terminals A and B of the B43 folding top luggage barrier sensor will illuminate at low intensity.
1. Ignition OFF, disconnect the harness connector at the B43 folding top luggage barrier sensor.
2. Place the M40 rear compartment lid latch in the closed position simulating a closed trunk.
3. Connect a test lamp between the B+ circuit terminal A and ground.
4. Ignition ON, command the power folding top to open and close with the power folding top switch. The test lamp should illuminate when the power folding top switch is activated.
• If the test lamp is always ON, test the B+ circuit for a short to voltage. If the circuit tests normal, replace the K23 folding top control module.
• If the test lamp is always OFF, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K23 folding top control module.
5. Ignition OFF, connect a test lamp between the B+ circuit terminal A and the signal circuit terminal B.
6. Ignition ON, command the power folding top to open and close with the power folding top switch. The test lamp should illuminate when the power folding top switch is activated.
• If the test lamp does not illuminate, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K23 folding top control module.
7. Ignition OFF, disconnect the X1 harness connector at the K23 folding top control module.
8. Test for infinite resistance between the signal circuit terminal 13 and ground.
• If not the specified value, test the signal circuit for a short to ground.
9. If all circuits test normal, replace the B43 folding top luggage barrier sensor.
Folding Top Position Sensor Malfunction
1. Ignition OFF, disconnect the harness connector at the B45 folding top position sensor.
2. Connect a test lamp between the B+ circuit terminal 1 and ground.
3. Ignition ON, trunk closed, command the power folding top to open and close with the power folding top switch. The test lamp should illuminate when the power folding top switch is activated.
• If the test lamp is always ON, test the B+ circuit for a short to voltage. If the circuit tests normal, replace the K23 folding top control module.
• If the test lamp is always OFF, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K23 folding top control module.
4. Ignition OFF, connect a test lamp between the B+ circuit terminal 1 and the signal circuit terminal 2.
5. Ignition ON, command the power folding top to open and close with the power folding top switch. The test lamp should illuminate when the power folding top switch is activated.
• If the test lamp does not illuminate, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K23 folding top control module.
6. Ignition OFF, disconnect the X1 harness connector at the K23 folding top control module.
7. Test for infinite resistance between the signal circuit terminal 9 and ground.
• If not the specified value, test the signal circuit for a short to ground.
8. If all circuits test normal, replace the B45 folding top position sensor.
Power Folding Top Motor Malfunction
1. Ignition OFF, disconnect the X404 harness connector at the M23 folding top pump motor.
2. Ignition ON, test for B+ between the control circuit terminal D and ground while holding the folding top switch in the up/close position.
• If less than the specified value, test the control circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the K23 folding top control module.
3. Verify that a test lamp does not illuminate between the control circuit terminal D and ground.
• If the test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal, replace the K23 folding top control module.
4. Ignition ON, test for B+ between the control circuit terminal C and ground while holding the folding top switch in the down/open position.
• If less than the specified value, test the control circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the K23 folding top control module.
5. Verify that a test lamp does not illuminate between the control circuit terminal C and ground.
• If the test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal, replace the K23 folding top control module.
6. If all circuits test normal, replace the M23 folding top pump motor.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Roof Retractable Position Sensor Replacement Roof Retractable Position Sensor Replacement
* Folding Top Pump with Motor Replacement Service and Repair
* Roof Retractable Opening Position Switch Replacement Roof Retractable Opening Position Switch Replacement
* Folding Top Front Latch Striker Replacement Service and Repair
* Roof Retractable Luggage Shade Detection Sensor Replacement Roof Retractable Luggage Shade Detection Sensor Replacement
* Control Module References Control Module References for FTC module replacement, programming and setup