S15/T15 Sonoma P/U 2WD L4-2.2L VIN 5 Flex Fuel (2001)
Information Bus: Description and Operation
DATA LINK COMMUNICATIONS DESCRIPTION AND OPERATION
CLASS 2 SERIAL DATA
The Class 2 serial data link allows modules to transmit, receive, or exchange data:
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Electronic Climate Control Module (ECCM)
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Transfer Case Shift Control Module (TCSCM)
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Electronic Brake Control Module (EBCM)
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Powertrain Control Module (PCM)
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Vehicle Interface Unit (VIU)
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Body Control Module (BCM)
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Instrument Panel Cluster (IPC)
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Driver Information Center (DIC)
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Memory Seat Module (MSM)
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Inflatable Restraint Sensing And Diagnostic Module (SDM)
The Class 2 serial data link allows a scan tool to communicate with these modules for testing purposes, checking for DTCs, and to
activate/enable/disable functions. These communication circuits are bussed together via SP201 which ensures a connection between the Class 2
communication circuits.
The data link connector has a signal return circuit for the serial data signal exiting the scan tool.
The scan tool is also supplied battery positive voltage and ground at the DLC.
