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

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

R1:

R1-R2:

R3-R4:

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 manual temperature control module (if equipped), the electronic automatic temperature control (EATC) module (if equipped), the audio unit, the THX(R) amplifier (if equipped), the satellite radio receiver (if equipped), the parking aid module (if equipped), the power liftgate module (if equipped) and the climate controlled seat module (if equipped). Voltage for the power running board module is provided by circuit SBB07 (WH/RD). Circuit GD143 (BK/VT) provides ground.

DTC U0244 - sets in a module which had attempted to communicate with the power running board module and failed.

Possible Causes
- Fuse
- Circuit GD143 (BK/VT) open
- Circuit SBB07 (WH/RD) open
- Circuit VDB06 (GY/OG) open (MS-CAN +)
- Circuit VDB07 (VT/OG) open (MS-CAN -)
- Power running board module