PT Cruiser 2006-2007

Convertible Tops

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Power Convertible Top



Diagnosis & Testing

The power top switch status is transmitted over the Local Interface Network (LIN) data bus circuit to the instrument cluster, sometimes referred to as the Cab Compartment Node (CCN). Once the message is received by the CCN, it is then sent to the driver window module via the Controller Area Network (CAN) data bus circuit. When a top operation message is received by the driver window module, it will ground the respective relay control circuit, which in turn will operate the motor. If the convertible top switch is pressed and held to the down position second detent, it will command both window modules to drop all the windows to the fully down position. The windows cannot be raised when the convertible top switch is in the top down position.

When the switch is held in the top up position and all four windows are fully up, the modules will lower the respective front window 1 1 / 2 inches (40mm), lower the respective rear window approximately 2 inches (55mm), and the driver window module will ground the top up relay control circuit. Once the top is back up, the windows will not raise automatically. When the top switch is pressed in either position, the driver window regulator module will ground the respective relay control circuit for a maximum of 20 seconds. The window regulator module monitors vehicle speed and if the speed is over 15 mph, the top will not operate.

The power convertible top hydraulic system consists of:



An electric hydraulic pump and motor (2)
 
Hydraulic lines
 
Two hydraulic cylinders (1)
 
Wire harness assembly (3)
 
Dual up/down relay

Click image to see an enlarged view

Fig. Power convertible top hydraulic system components

 

The hydraulic pump, motor, cylinders, lines, and fluid are serviced only as an assembly. If a leak in the hydraulic system is found, the entire hydraulic pump/motor assembly must be replaced.

The power top system receives battery feed through a 40 amp fuse in the Totally Integrated Power Module (TIPM), only when the ignition switch is in the ON position. In each door there is a window regulator module directly connected to each of the front door window regulator motors. The window regulator module receives battery feed through a 30 amp fuse in the TIPM and then through an in line circuit breaker located on the wiring harness. The modules control window motor operation, smart glass functions, and rear window operations. The driver window module controls the convertible top operations by supplying a ground signal to the motor/hydraulic pump relay. The main components of the power top system are:



The power top framework and bows (1)
 
The motor/hydraulic pump assembly (2)
 
The power top well (3)
 
The power top pivot bracket (4)
 
The latch system (5)
 
The power top switch
 
The window regulator modules
 

The power top motor is part of the motor/hydraulic pump assembly and cannot be serviced separately. If the motor is inoperative, the complete assembly must be replaced.

Click image to see an enlarged view

Fig. Power convertible top main components

Motor

NOTE
The convertible top system is equipped with a hydraulic bypass screw that is used to relieve pressure from the hydraulic system in the event that the top must be manually raised or lowered (such as a low battery or a convertible top operating concern). Always verify that the bypass screw is tight in the pump housing prior to replacing a hydraulic pump/motor assembly.


NOTE
The convertible top will raise slowly or make abnormal noise if the hydraulic fluid level is low.


NOTE
The hydraulic pump, motor, cylinders, lines, and fluid are serviced only as an assembly. If a leak in the hydraulic system is found, the entire hydraulic pump/motor assembly must be replaced.

  1. Using the convertible top switch, apply power to the hydraulic pump motor and listen for operation. If the hydraulic pump motor functions, go to Step 2.
  2.  
  3. Verify the bypass screw is secure in the hydraulic pump housing. If OK, go to Step 3. If not OK, tighten the screw to 18 inch lbs. (2 Nm) and verify proper convertible top operation.
  4.  
  5. Remove the cover from the top of hydraulic pump/motor assembly and inspect the hydraulic pump/motor assembly for damage or leaks.
    1. If damage or leaking is found, replace the hydraulic pump/motor assembly.
    2.  
    3. If OK, go to Step 4.
    4.  

  6.  
  7. Remove the rear quarter panel trim and check the hydraulic cylinders and lines for damage and leaks.
    1. A small amount of oil residue at the cylinder seals is normal.
    2.  
    3. If damage or leaking is found, replace the hydraulic pump/motor assembly.
    4.  

  8.  

Switch

Any diagnosis of the power top system should begin with the use of a scan tool and the proper Diagnostic Procedures Information. The scan tool can provide confirmation that the Controller Area Network (CAN) data bus is functional, that all of the electronic modules are sending and receiving the proper messages on the CAN data bus, and that the power top motor is being sent the proper hard wired output by the driver window regulator module.

If the problem being diagnosed is an inoperative power top switch illumination lamp, but the power top switch operates as designed, replace the inoperative power top switch. Refer to the appropriate diagnostic information.

  1. Check for any Diagnostic Trouble Codes (DTC's).
    1. With a scan tool, record and erase any DTC's.
    2.  
    3. Cycle the ignition switch from On to Off.
    4.  
    5. Operate the Power Top down and up.
    6.  
    7. Wait one minute.
    8.  
    9. With the scan tool, read the DTC-s.
    10.  
    11. Does the scan tool display B18D7 CONVERTIBLE TOP CIRCUIT LOW/OPEN-

      If yes, go to Step 2.
       
      If no, the conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for an intermittent condition. Perform the BODY VERIFICATION TEST-VER 1.

      Click image to see an enlarged view

      Fig. Power convertible top control circuit schematics

       

    12.  

  2.  
  3. Check for the Power Top fuse being open.
    1. Test the Power Top Feed fuse No. 1 in the Totally Integrated Power Module (TIPM).
    2.  
    3. Is the fuse open-

      If yes, replace the fuse and operate the power top several times. If the fuse blows again, use the wiring diagram/schematic as a guide to locate the shorted circuit. Perform the BODY VERIFICATION TEST-VER 1.
       
      If no, go to Step 3.
       

    4.  

  4.  
  5. Check the (A925) Fused Battery positive circuit for an open.
    1. Disconnect the Power Top Relay (at the Pump assembly).
      NOTE
      Ensure the fuse is installed before continuing.

    2.  
    3. Turn the ignition ON.
    4.  
    5. Measure the voltage between (A925) Fused Battery positive circuit and a ground at the Power Top Relay.
    6.  
    7. Is the voltage above 11.0 volts-

      If yes, go to Step 4.
       
      If no, repair the (A925) Fused Battery positive circuit for an open. Perform the BODY VERIFICATION TEST-VER 1.
       

    8.  

  6.  
  7. Check the (P80) Top Down Relay Control wire for a short to a ground.
    1. Turn the ignition OFF.
    2.  
    3. Disconnect the Left Window Regulator Module connector.
    4.  
    5. Measure the resistance between a ground and the (P80) Top Down Relay Control circuit.
    6.  
    7. Is the resistance below 1,000.0 ohms-

      If yes, repair the (P80) Top Down Relay Control circuit for a short to ground. Perform the BODY VERIFICATION TEST-VER 1.
       
      If no, go to Step 5.
       

    8.  

  8.  
  9. Check the (P90) Top Up Relay Control wire for a short to ground.
    1. Measure the resistance between a ground and the (P90) Top Up Relay Control circuit.
    2.  
    3. Is the resistance below 1,000.0 ohms-

      If yes, repair the (P90) Top Up Relay Control circuit for a short to ground. Perform the BODY VERIFICATION TEST-VER 1.
       
      If no, go to Step 6.
       

    4.  

  10.  
  11. Check the (P80) Top Down Relay Control circuit for an open.
    NOTE
    Ensure that the Power Top Relay (at the Pump assembly) is connected before proceeding.

    1. Turn the ignition ON.
    2.  
    3. Measure the voltage between a ground and the (P80) Top Down Relay Control circuit in the Window Regulator Module connector.
    4.  
    5. Is the voltage above 11.0 volts-

      If yes, go to Step 7.
       
      If no, go to Step 9.
       

    6.  

  12.  
  13. Check the (P90) Top Up Relay Control circuit for an open.
    1. Measure the voltage between a ground and the (P90) Top Up Relay Control circuit in the Window Regulator Module connector.
    2.  
    3. Is the voltage above 11.0 volts-

      If yes, replace the Window Regulator Module. Perform the BODY VERIFICATION TEST-VER 1.
       
      If no, go to Step 8.
       

    4.  

  14.  
  15. Check the (P90) To Up Relay Control wire for an open.
    1. Turn the ignition OFF.
    2.  
    3. Measure the resistance of the (P90) Top Up Relay Control circuit between the relay connector and the module connector.
    4.  
    5. Is the resistance below 5.0 ohms-

      If yes, replace the Power Top Relay. Perform the BODY VERIFICATION TEST-VER 1.
       
      If no, repair the (P90) Top Up Relay Control circuit for an open. Perform the BODY VERIFICATION TEST-VER 1.
       

    6.  

  16.  
  17. Check the (P80) Top Down Relay Control wire for an open.
    1. Turn the ignition OFF.
    2.  
    3. Measure the resistance of the (P80) Top Down Relay Control circuit between the relay connector and the module connector.
    4.  
    5. Is the resistance below 5.0 ohms-

      If yes, replace the Power Top Relay. Perform the BODY VERIFICATION TEST-VER 1.
       
      If no, repair the Top Down Relay Control wire for an open. Perform the BODY VERIFICATION TEST-VER 1.
       

    6.  

  18.  

Body Verification Test-Ver 1

NOTE
PT27 ONLY: If a Window Regulator Module was replaced, close both doors, raise both door windows fully up and hold the switch in the up position for 2 additional seconds, then use the scan tool to "Initialize Module."

  1. Disconnect all jumper wires and reconnect all previously disconnected components and connectors.
  2.  
  3. Ensure that all accessories are turned OFF.
  4.  
  5. Ensure that the battery is fully charged.
  6.  
  7. Turn the ignition ON.
  8.  
  9. With the scan tool, record and erase any Diagnostic Trouble Codes (DTC's) from all modules.
  10.  
  11. If an electronic control module was replaced, select the applicable module from the scan tool menu and press -Misc. Functions.- If the module has programmable features, program as necessary.
  12.  
  13. (Export only) If the Intrusion Transceiver Module (ITM) and/or Siren was replaced, select ITM from the scan tool ECU View menu then -Misc. Functions- and perform the applicable replacement procedure.
  14.  
  15. Turn the ignition OFF, wait 10 seconds, and then turn the ignition ON.
  16.  
  17. Operate all functions of the system that caused the original concern. If a repair or module replacement was done to the front power windows on a PT27, operate the motor fully down and then to the full up position and stall it for 2 seconds.
  18.  
  19. With the scan tool, select ECU View and check for DTC's in the modules.
  20.  
  21. Are any DTC-s present in any of the modules or is the original condition still present-
    1. If yes, the repair is not complete. Refer to the related category for the DTC or symptom that is still present.
    2.  
    3. If no, the repair is complete.
    4.  

  22.  

Removal & Installation
Motor
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Position the convertible top in the raised position.
  4.  
  5. Disconnect and isolate the negative battery cable.
  6.  
  7. Remove the rear seat cushion.
  8.  
  9. Remove the interior quarter trim panels.
  10.  
  11. Remove the rear seat back.
  12.  
  13. Remove the push-pins (1) that secure the convertible top well (2) to the rear seat back panel (3) and body (4) and remove the well liner.

    Click image to see an enlarged view

    Fig. Remove the push-pins that secure the convertible top well to the rear seat back panel and body and remove the well liner

  14.  
  15. Remove the protective cover (3) from the top of the hydraulic pump/motor assembly (4) located on the shelf panel (2).

    Click image to see an enlarged view

    Fig. Remove the protective cover from the top of the hydraulic pump/motor assembly located on the shelf panel

  16.  
  17. Disconnect the convertible top wire harness from the main body harness.
  18.  
  19. Remove the nuts (1) that secure the hydraulic pump/motor assembly to the top of the shelf panel.

    Click image to see an enlarged view

    Fig. Remove the 2 nuts that secure the hydraulic pump/motor assembly to the top of the shelf panel

  20.  
  21. Remove the 6 retaining clips (3 per side) that secure the hydraulic hoses and convertible top wire harness to the body.
    NOTE
    Place a reference mark along the outer edge of the shelf seat brackets to ensure they are installed back to the original position.

  22.  
  23. Remove the 3 bolts and 2 nuts that secure each rear seat back support bracket (2) and remove both brackets.
  24.  
  25. Remove the 2 bolts (1) that secure each hydraulic cylinder to the main pivot brackets.

    Click image to see an enlarged view

    Fig. Remove the 3 bolts and 2 nuts that secure each rear seat back support bracket and remove both brackets. Remove the 2 bolts that secure each hydraulic cylinder to the main pivot brackets

  26.  
  27. Remove each hydraulic cylinder (1) from the main pivot brackets and remove the hydraulic pump/motor assembly from the vehicle.

    Click image to see an enlarged view

    Fig. Remove each hydraulic cylinder from the main pivot brackets

  28.  

To install:

  1. Position the hydraulic pump/motor assembly into the vehicle.
  2.  
  3. Install the hydraulic cylinders (1) onto the main pivot brackets.

    Click image to see an enlarged view

    Fig. Install the hydraulic cylinders onto the main pivot brackets

  4.  
  5. Install the 2 bolts (1) that secure each hydraulic cylinder to the main pivot brackets. Tighten the bolts securely.
  6.  
  7. Align each rear seat back support bracket (2) to the previously marked bracket locations.
  8.  
  9. Install the 3 bolts and 2 nuts one at a time that secure each rear seat back support bracket. Make sure the position of the bracket aligns with each previously marked location. Tighten the fasteners securely.

    Click image to see an enlarged view

    Fig. Install the 3 bolts and 2 nuts that secure each rear seat back support bracket. Make sure the position of the bracket aligns with each previously marked location

  10.  
  11. Install the 2 nuts (1) that secure the hydraulic pump/motor assembly to the top of the shelf panel. Tighten the nuts securely.
  12.  
  13. Install the six retaining clips (3 per side) that secure the hydraulic hoses and wire harness to the body.
  14.  
  15. Connect the convertible top wire harness to the main body harness.

    Click image to see an enlarged view

    Fig. Install the 2 nuts that secure the hydraulic pump/motor assembly to the top of the shelf panel

  16.  
  17. Install the protective cover (3) to the top of the hydraulic pump/motor assembly (4) located on the shelf panel (2).

    Click image to see an enlarged view

    Fig. Install the protective cover to the top of the hydraulic pump/motor assembly located on the shelf panel

  18.  
  19. Position the convertible top well liner (2) into the vehicle and install the push-pins (1) that secure the liner to the rear seat back panel (3) and body (4).
  20.  
  21. Install the rear seat back.
  22.  
  23. Install the interior quarter trim panels.
  24.  
  25. Install the rear seat cushion.
  26.  
  27. Connect the negative battery cable.

    Click image to see an enlarged view

    Fig. Position the convertible top well liner into the vehicle and install the push-pins that secure the liner to the rear seat back panel and body

  28.  

Switch

The power top switch is located in the Instrument Panel (IP) center stack (2) as an integral part of the accessory switch bezel. The power top switch is a unit that transmits commands over the Controller Area Network (CAN) data bus to the power window regulator module. The power top switch performs the following functions:



Power top up (switch pushed upward)
 
Power top down (switch pushed downward to the first position)
 
Power top express down/all windows down (switch pushed downward to the second position and held in place)
 

The power top switch cannot be adjusted or repaired. If the switch is damaged or inoperative, the accessory switch bezel must be replaced.

Click image to see an enlarged view

Fig. The power top switch is located in the Instrument Panel (IP) center stack


WARNING
On vehicles equipped with airbags, disable the airbag system before attempting any steering wheel, steering column, or instrument panel component diagnosis or service. Disconnect and isolate the negative battery (ground) cable, then wait 2 minutes for the airbag system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the airbag system. Failure to take the proper precautions could result in accidental airbag deployment and possible personal injury or death.

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Disconnect and isolate the negative battery cable.
  4.  
  5. Remove the 2 center Instrument Panel (IP) bezel attaching screws (4) accessible through each air duct.
  6.  
  7. Using a trim stick C-4755 or equivalent (1), remove the center bezel (2) from the instrument panel (3) by releasing the snap retainers from the instrument panel.
    NOTE
    To aid in reinstallation, note the installed positions of the control cables prior to removal.



    Click image to see an enlarged view

    Fig. Remove the 2 center Instrument Panel (IP) bezel attaching screws accessible through each air duct and remove the center bezel from the instrument panel by releasing the snap retainers from the instrument panel

  8.  
  9. Disconnect the control cables and the wire harness connectors from the back of the A/C-heater control.
  10.  
  11. Disconnect the wire harness connectors from the accessory switches, clock and power window switches (as equipped) and place the center bezel on a work bench.
  12.  
  13. Remove the screws that secure the accessory switch bezel and the A/C-heater control to the back of the center bezel and remove the bezel and control.
  14.  
  15. If required, remove the clock from the center bezel.
  16.  
  17. If required, remove the power window switches from the center bezel.
  18.  
  19. If required, remove the instrument panel air outlets from the center bezel.
  20.  

To install:

  1. If removed, install the instrument panel air outlets onto the back of the center bezel.
  2.  
  3. If removed, install the power window switches onto the back of the center bezel.
  4.  
  5. If removed, install the clock onto the back of the center bezel.
  6.  
  7. If removed, install the A/C-heater control and the accessory switch bezel onto the back of the center bezel. Install and tighten the retaining screws to 18 inch lbs. (2 Nm).
  8.  
  9. Position the center bezel to the instrument panel and connect the control cables and wire harness connectors to the back of the A/C-heater control.
  10.  
  11. Connect the wire harness connectors to the accessory switches, clock and power window switches (as equipped).
  12.  
  13. Install the center bezel onto the instrument panel. Make sure the snap retainers are fully engaged to the instrument panel.
  14.  
  15. Install the center bezel attaching screws located inside each air duct.
  16.  
  17. Connect the negative battery cable.
  18.  

 
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