320D3 GC Excavators Machine Electronic Control System Diagnostic Capabilities Caterpillar


Diagnostic Capabilities
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1.1. Cat ET
2.2. Status Groups For Electronic Technician

Diagnostic information for the electronic control modules (ECM) can be accessed using the Cat® Electronic Technician (ET) service tool.

Cat ET



Illustration 1g03846497
Components of the Communication Adapter 3 Gp (538-5051) are listed:
(1) Current version of Cat ET software for use with a Windows-based personal computer
(2) 478-0235 Control Gp-Electronic (Com Adapter 3)
(3) 457-6114 Cable As. (CA3 - Ethernet FLASH Cable)
(4) 370-4617 Cable As. (CA3 PC USB Cable)

When using Cat ET to diagnose machines covered in this manual, cable assembly 457-6114 is required. The cable allows connections between a 9-pin port connector or a 14-pin port connector and the Communication Adapter 3 module.

The new 14-Pin harness includes an Ethernet port connector which allows for flashing software using Ethernet.



Illustration 2g03845540
This harness supports both 9-Pin and 14-Pin SAE J1939 Comm Adapter connections
(3) CA3 Ethernet FLASH Cable ( 457-6114)

Cat ET is a software program used to access, view, monitor, and sometimes change data used by an ECM. The service technician can use Cat ET to perform maintenance on the machine. Some of the options that are available with Cat ET are listed below:

  • View the active and logged diagnostic codes. See Troubleshooting, "Using Cat ET to Determine Diagnostic Codes".

  • Viewing the active event codes and logged event codes.

  • View the status of parameters.

  • Clear active diagnostic codes and clear logged diagnostic codes.

  • Perform calibrations of machine systems.

  • Program (Flash) the ECM with the "WINflash" program. See Troubleshooting, "ECM Software - Install".

  • Print reports.

The following list contains some of the diagnostic functions and programming functions performed by the Cat ET service tool.

  • The failures of the ECM system are displayed.

  • The status of most of the inputs and the outputs are displayed.

  • The settings for the ECM are displayed.

  • Display the status of the input and output parameters in real time.

  • Display the clock hour of the internal diagnostic clock.

  • The number of occurrences.

  • The clock hour of the first occurrence and the last occurrence are displayed for each logged diagnostic code.

  • The definition for each logged diagnostic code and each event is displayed.

  • Load (Flash) new software.

  • Active and logged diagnostic codes.

  • Active and logged event codes.

See Troubleshooting, "Diagnostic Code List" for the list of diagnostic codes activated by the ECM.

Status Groups For Electronic Technician

The Status groups list the machine parameters. The status of the parameters is shown in real time.



Illustration 3g02734437
Typical Cat ET Status Screen.

Information System:

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M314, M315, M316, M318, M319, and M320 Wheeled Excavator Machine System Ride Control - Test - Ride Control / Smart Boom Valve
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M314, M315, M316, M318, M319, and M320 Wheeled Excavator Machine System Pressure Cutoff (Travel Motor) - Test and Adjust
M314, M315, M316, M318, M319, and M320 Wheeled Excavator Machine System Brake Accumulator - Test and Charge
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