299D and 299D XHP Compact Track Loaders and 272D and 272D XHP Skid Steer Loaders Monitoring System Caterpillar


Data Link

Usage:

272D GSL


CAN A (J1939) Data Link

The CAN A (J1939) data link is an input and an output of the Electronic Control Module (ECM). The CAN A (J1939) data link communicates with the ECM, both Instrument Clusters, and the service tools. The ECM can input information and the ECM can output information with the CAN A (J1939) data link.

The CAN A (J1939) data link has the following properties:

  • Serial data link

  • High speed link

  • Bidirectional link

The data link is not a visible component. The CAN A (J1939) data link consists of the following components:

  • Internal ECM circuits

  • Related harness wiring

  • Service tool connector

Much information is available on the CAN A (J1939) Data Link. The ECM requires the use of certain data that is sent back and forth on the CAN A (J1939) data link. Some of the shared information is described below:

  • The ECM receives commands from the CAN A (J1939) data link in order to change operating modes.

  • The ECM receives commands from the CAN A (J1939) data link in order to read service codes that are stored in the ECM memory. The service codes can also be cleared.

  • The ECM sends the following information to the CAN A (J1939) data link: engine speed, direction, status of operator error and fault information of the ECM.

  • The CAN A (J1939) data link shows this information to the operator. The information is shown on gauges, on alert indicators, and on the display area of the Instrument Cluster.

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