938G Wheel Loader, 938G Series II Wheel Loader, IT38G Integrated Toolcarrier and IT38G Series II Integrated Toolcarrier Traction Control System Diagnostic Capabilities Caterpillar


Diagnostic Capabilities
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938G Wheel Loader, 938G Series II <BR>Wheel Loader, IT38G <BR>Integrated Toolcarrier and IT38G Series II <BR>Integrated Toolcarrier Traction Control System [SENR6719]
ELECTRICAL AND STARTING SYSTEM
ELECTRONICS GP-MACHINE
1.1. Diagnostic Indicator
2.1. The Caterpillar Electronic Technician (ET)
3.1. Event Codes
4.2. Active Event Codes
5.2. Logged Event Codes
6.1. Status Groups For The Electronic Technician

Diagnostic Indicator




Illustration 1g00842166

The diagnostic indicator is used to get basic fault information from the control module. The various modes of displaying diagnostics are controlled by the termination of the harness code connector. The harness code connector is a connector with eight pins. The female end of the DT connector accepts the termination plug. During normal operation, this plug is installed in the connector. If a system problem is detected by the ECM, the diagnostic indicator will turn on. The indicator will remain on if the problem is active.

When the termination plug is removed from the connector, the ECM will display the first problem. The problem is displayed by flashing the diagnostic indicator. A valid diagnostic code will consist of a series of flashes for the first digit. A short pause immediately follows the first series of flashes. Then, a second series of flashes will represent the second digit. Then, a third series of flashes will represent the third digit. If no diagnostic codes are present or logged, the ECM will broadcast code 222. See Troubleshooting, "Using the Diagnostic Indicator to Determine Diagnostic Codes".

The AVSpare Electronic Technician (ET)




Illustration 2g00777826

The AVSpare Electronic Technician (ET) is a software program that is used to access data. The service technician can use the AVSpare Electronic Technician in order to perform maintenance work on the machine. Some of the options that are available with the AVSpare Electronic Technician are listed below:

  • Diagnosis of problems

  • Viewing diagnostic codes

  • Viewing active event codes and logged event codes

  • View the status of parameters.

  • Clear active diagnostic codes and clear logged diagnostic codes

  • Perform calibration of machine systems. See Testing and Adjusting, "Calibrations".

  • Program the ECM (Flash). This is done with the "WINflash" program. See Testing and Adjusting, "Electronic Control Module (ECM) - Flash Program".

  • Print reports.

See Troubleshooting, "Using the AVSpare Electronic Technician to Determine Diagnostic Codes". Diagnostic information is accessed with the following drop down menus:

  • Active diagnostic codes

  • Logged diagnostic codes

Event Codes

Active Event Codes




Illustration 3g00788686

An active event indicator is provided in order to monitor events that are currently flagged as a system problem. The information that is provided for an active event is an event identifier (EID) and a text description of the problem.

Logged Event Codes




Illustration 4g00789603

A logged event indicator is provided in order to monitor events that are intermittent or recurring. The data for the logged event will include the following information:

  • An event identifier (EID)

  • A text description of the problem

  • The number of occurrences of the problem

  • Time stamped information for the first occurrence of the problem

  • Time stamped information for the last occurrence of the problem

Status Groups For The Electronic Technician




Illustration 5g00843218

ET Screen That Shows the Available Groups

The Status groups are lists of machine parameters. The status of the parameters are shown in real time.

Information System:

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