Pinpoint Test C: The Power Running Board (PRB) Does Not Operate Correctly - Right Running Board

Power Running Board (PRB)

Pinpoint Test C: The Power Running Board (PRB) Does Not Operate Correctly - Right Running Board

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

Normal Operation

During self-test, the Power Running Board (PRB) module monitors the length of time it takes to deploy and stow the LH and RH PRBs. If the time exceeds 4 seconds, B2816 or B2817 will be generated.

The PRB module receives door ajar and vehicle speed status over the Controller Area Network (CAN). During RH PRB deployment, the PRB module supplies power to the RH PRB motor through circuit CPR44 (BN/WH) and ground through circuit CPR45 (VT/GY). The PRB module stows the RH PRB by supplying power to the RH PRB motor through circuit CPR45 (VT/GY) and ground through circuit CPR44 (BN/WH). The PRB module provides a regulated 10-volt power supply to the Hall-effect sensor (internal to the PRB motor) through circuit CPR47 (GY/BN). The Hall-effect ground is provided by the PRB module through circuit RPR47 (BU/GN). The PRB module monitors the RH PRB Hall-effect signal through circuit VPR46 (GY/OG). If the PRB module does not receive any signal from the Hall-effect sensor during operation, the PRB will stop.

- B2816 (RH Power Running Board Stow Time Fail) - Right running board takes greater than 4 seconds to stow.
- B2817 (RH Power Running Board Deploy Time Fail) - Right running board takes greater than 4 seconds to deploy.

This pinpoint test is intended to diagnose the following:
- Mechanical resistance due to foreign material
- Wiring, terminals or connectors
- Door ajar switch
- PRB module
- RH PRB motor



PINPOINT TEST C: THE POWER RUNNING BOARD (PRB) DOES NOT OPERATE CORRECTLY - RIGHT RUNNING BOARD

C1-C6:

C6-C8:

C8-C10:

C10-C12: