Test N: The Power Running Board Module Does Not Respond To The Scan Tool

PINPOINT TEST N: THE POWER RUNNING BOARD MODULE DOES NOT RESPOND TO THE SCAN TOOL

Normal Operation
The power running board (PRB) module communicates with the scan tool through the medium speed controller area network (MS-CAN). Circuits VDB06 (GY/OG) (MS-CAN +) and VDB07 (VT/OG) (MS-CAN -) provide the network connection to the PRB module. The PRB module shares the MS-CAN with the instrument cluster (IC), the smart junction box (SJB), the heating ventilation air conditioning (HVAC) module (if equipped), the audio control module (ACM), the rear entertainment module (RETM) (if equipped), the driver seat module (DSM) (if equipped), the satellite digital audio receiver system (SDARS) module (if equipped), and the parking aid module (PAM) (if equipped). Voltage for the PRB module is provided by circuit SBB19 (BU/RD). Circuit GD151 (BK/GN) provides ground.

This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- PRB module

N1-N2:

N3-N4: