Pinpoint Test A: The Power Running Board (PRB) Does Not Operate Correctly - Both Running Boards

Power Running Board (PRB)

Pinpoint Test A: The Power Running Board (PRB) Does Not Operate Correctly - Both Running Boards

Refer to Wiring Diagram Set 109, Power Liftgate/Retractable Running Boards for schematic and connector information. Diagrams By Number

NOTE: The Power Running Board (PRB) module will stop functionality when battery voltage drops below 9.5 volts (early build) or 9.0 volts (late build). The PRB system will recover at the next door ajar transition provided that the battery voltage remains above 9.0 volts (late build only).

Normal Operation

The PRB module receives power through circuit SBB11 (BU/RD) and ground through circuit GD134 (BK/VT). The LH and RH PRB motor Hall-effect sensors receive a regulated 10-volt power supply from the PRB module through circuit CPR47 (GY/BN). The Hall-effect ground is provided by the PRB module through circuit RPR47 (BU/GN). The PRB module receives door ajar and vehicle speed status over the Controller Area Network (CAN).

This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- PCM
- Instrument Cluster (IC)
- PRB module



PINPOINT TEST A: THE POWER RUNNING BOARD (PRB) DOES NOT OPERATE CORRECTLY - BOTH RUNNING BOARDS

A1-A6:

A6-A8:

A8-A11:

A11-A13: