Pinpoint Test F : C1008:93, C1009:93, C1B14:11, C1B14:12: Notes

WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.

Refer to Wiring Diagram Power Liftgate/Retractable Running Boards for schematic and connector information.

Normal operation and Fault Conditions

The RBM monitors the movement, position and current draw of each PRB with a hall-effect switch that is integral to each PRB motor. The RBM supplies a shared 10 volt controlled voltage and a shared ground circuit to the PRB motor hall-effect sensors, and receives separate sensor signals from the RH and LH hall-effect sensors. Voltage varies on the LEFT or RIGHT RB hall-effect signal circuit as the motor moves the PRB. An open or shorted circuit will set these DTC.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
C1008:93	Left Power Running Board Position/Motion Sensor: No Operation	This DTC sets if the system voltage is between 9.5 - 16 volts, the LH PRB motion is commanded and the left RB hall effect signal circuit at the RBM does not change.
C1009:93	Right Power Running Board Position/Motion Sensor: No Operation	This DTC sets if the system voltage is between 9.5 - 16 volts, the RH PRB motion is commanded and the right RB hall effect signal circuit at the RBM does not change.
C1B14:11	Sensor Supply Voltage A: Circuit Short To Ground	This DTC sets if the system voltage is between 9.5 - 16 volts, any PRB motion is commanded and the hall effect power circuit at the RBM is less than 7.5 volts.
C1B14:12	Sensor Supply Voltage A: Circuit Short To Battery	This DTC sets if the system voltage is between 9.5 - 16 volts, any PRB motion is commanded and the hall effect power circuit at the RBM is greater than 10 volts.

Possible Sources

Wiring, terminals or connectors
RH or LH PRB motor
RBM

Visual Inspection and Diagnostic Pre-checks

RH and LH PRB motor harness connections and wiring.