Convertible Top Pump: Testing and Inspection

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 Programmable Communications Interface (PCI) data bus is functional, that all of the electronic modules are sending and receiving the proper messages on the PCI data bus, and that the power top motor is being sent the proper hard wired output by the driver window regulator module.

If the power top is completely inoperative and the motor/hydraulic pump assembly is suspect, perform the following:
1. Disconnect and isolate the battery negative cable.
2. Remove the rear seat back.
3. Remove the well liner/carpet from the power top well.
4. Remove the foam pump cover from over the motor/hydraulic pump.

Motor/Hydraulic Pump Assembly:

5. Disconnect the motor/hydraulic pump wire harness connector.
6. Reconnect the battery negative cable.
7. Insert a 12V test light between the two connector terminals of the motor/hydraulic pump wire harness connector.
8. With the ignition in the "RUN" position, operate the power top in both directions while observing the test light. The light should illuminate in both directions. If OK, replace the inoperative motor/hydraulic pump assembly. If not OK, use a scan tool and the proper Diagnostic Procedures Information to complete diagnosis of the power top system.