AccuGrade® Laser (CB420) Caterpillar

Determining Detected Faults (Electronic Service Tool)

Usage:

120H ALZ

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Illustration 1	g00719115
Connections for the Communication Adapter II and the CAT ET. The components that are needed in order to use the Communication Adapter II and the CAT ET in order to determine diagnostic codes are listed: (1) Current version of CAT ET software and an IBM-COMPATIBLE personal computer (2) Service diagnostic cable. (3) 171-4400 Communication Adapter II Group and the software (4) Cable

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Illustration 2	g00738951
Connections for the Communication Adapter II and the Cat ET. (2) cable assembly (machine control to the Communication Adapter II) (3) 171-4400 Communication Adapter II Group (4) cable assembly (serial cable to DB-9 connector)

Note: The Cat ET is a software program that is used with an IBM compatible personal computer.

In order to use the Cat ET, order the following materials: Special Publication, JERD2124, "ET Single Use Program License", Special Publication, JEHP1026, "Information and Requirements Sheet", 196-0055 Data Link Cable and the Data Subscription and Special Publication, JERD2142, "Data Subscription". The Special Publication, JEHP1026, "Information and Requirements Sheet" lists the required hardware and the features of the ET.

The Cat ET is not required in order to determine the diagnostic codes and the Cat ET is not required in order to clear the diagnostic codes. However, the process of determining the diagnostic codes is easier and faster by using the Cat ET. The Cat ET can also display information on the history of a diagnostic code and the parameter status of diagnostic codes. These features allow the Cat ET to be a useful tool for troubleshooting.

The Cat ET connects to the machine diagnostic connector and the Cat ET communicates with the electronic control modules over the data link. The diagnostic connector is located by the fuse panel. For more information and the locations of the connectors, see Troubleshooting, "Electrical Components and Connector Locations" and the Electrical System Schematic in your machine's Service Manual.

Connect the Cat ET to the machine. Turn the key start switch to the RUN position. Start the Cat ET. The Cat ET will initiate communications with the electronic control modules on the machine. The Cat ET will list the available electronic control modules on the machine after communication has been established.

Note: Cat ET can only view diagnostic information for the implement/control valve.

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