B1311
DTC B1311
CIRCUIT DESCRIPTION
The roof door module (RDM) monitors the folding top cylinder position sensor extended signal circuit. The RDM supplies all of the hall effect switches with a 12-volt reference voltage and when the folding top cylinder position extended sensor is activated, a signal voltage of between 0.35 and 1.33 volts is sent on the folding top cylinder position sensor extended signal circuit to the RDM. This signal will indicate that the cylinder has fully extended.
DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC B1311 Convertible Top/Moveable Roof Main Movement Down Sensor Circuit
CONDITIONS FOR RUNNING THE DTC
- The battery voltage is between 9-16 volts.
- Ignition is in the Run or Accessory position or retained accessory power (RAP) is active.
CONDITIONS FOR SETTING THE DTC
- The RDM detects a short to ground, short to battery voltage, or an open in the folding top cylinder position sensor extended signal circuit of the folding top cylinder position sensor.
- The RDM detects the folding top cylinder position extended sensor active and the folding top cylinder position retracted sensor active at the same time.
ACTION TAKEN WHEN THE DTC SETS
- Stores a current and history DTC B1311 in the RDM.
- The top operation is suspended.
- Message displayed on the Driver Information Display-ROOF HALL SWITCH FAULT.
CONDITIONS FOR CLEARING THE DTC
- This DTC will clear on the current status after the condition for setting the fault is corrected.
- A history DTC will clear after 50 consecutive ignition cycles without a fault present.
- History and current DTC can be cleared using the scan tool.
DIAGNOSTIC AIDS
If the DTC does not reset after the code is cleared, then the switch may be the intermittent fault.
TEST
