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

N1:

N1-N2:

N3-N4:

Normal Operation
The power running board 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 power running board module. The power running board module shares the MS-CAN network with the instrument cluster, the smart junction box (SJB), the electronic automatic temperature control (EATC) module (if equipped), the audio unit, the digital versatile disc (DVD) player (if equipped), the driver seat module (DSM) (if equipped), the satellite radio receiver (if equipped), and the parking aid module (if equipped). Voltage for the power running board module is provided by circuit SBB19 (BU/RD). Circuit GD151 (BK/GN) provides ground.

Possible Causes
- Fuse
- Circuit GD151 (BK/GN) open
- Circuit SBB19 (BU/RD) open
- Circuit VDB06 (GY/OG) open (MS-CAN +)
- Circuit VDB07 (VT/OG) open (MS-CAN -)
- Power running board module