Test I: The Smart Junction Box (SJB) Does Not Respond To The Scan Tool

PINPOINT TEST I: THE SMART JUNCTION BOX (SJB) DOES NOT RESPOND TO THE SCAN TOOL

I1-I2:

I3-I4:

Normal Operation
The SJB 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 SJB. The SJB shares the MS-CAN network with the instrument cluster, 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 driver seat module (DSM) (if equipped), the climate controlled seat module (if equipped), the power liftgate module (if equipped), the parking aid module (if equipped) and the digital versatile disc (DVD) player (if equipped). Voltage for the SJB is provided by circuit CDC33 (VT/GN). Circuit GD133 (BK) provides ground.

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