Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
To diagnose the B3971 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.
The Folding Top Control (FTC) Module supplies accessory voltage to the top open and closed limit switches. It 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: Top Closed Switch-The switch will be closed to voltage and the scan tool parameter should display Active and Top Open Switch-The switch will be open and the scan tool parameter should display Inactive. The FTC module will set B3971 as a current Diagnostic Trouble Code (DTC) if it senses that both the top open and top closed limit switches are active at the same time.
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