Pinpoint Test 1: Smart Junction Box (SJB) Does Not Respond to the Diagnostic Tool
PINPOINT TEST 1: SMART JUNCTION BOX (SJB) DOES NOT RESPOND TO THE DIAGNOSTIC TOOLNormal Operation
The SJB communicates with the scan tool through the high speed controller area network (HS-CAN). Circuits (W/L) (HS-CAN +) and (W) (HS-CAN -) provide the network connection to the SJB. The SJB shares the HS-CAN with the powertrain control module (PCM), the restraints control module (RCM), the occupant classification sensor module (OSCM), the four wheel drive (4WD) control module, and the instrument cluster. Voltage is supplied through circuit (GY/R), and ground is provided through circuit (B/W).
This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- SJB
CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
