PLUG 6Y0789 - Caterpillar

The Caterpillar Electronic Service Tools are designed to help the service technician analyze and locate faults or problems within the system. They are required to perform calibrations, and to read or change engine parameters.Caterpillar ET (Electronic Technician) is a software program that runs on a personal computer and requires a Caterpillar Communication Adapter or MPSI Pro-Link with Caterpillar Cartridge to translate information from the ATA Data Link to the computer RS-232 port. Caterpillar ET is the recommended Service Tool.ET (Electronic Technician) can be used to display the following information: * Programmble Parameter Settings* Active and Logged Diagnostic Codes* Logged Events* Current Totals* Maintenance IntervalsET (Electronic Technician) can also be used to perform the following functions: * Diagnostic Tests* Sensor Calibrations* Flash Programming* Parameter Programming* Copy Configuration (ECM Replacement)* Data Logging* Real Time GraphingThe Electronic Control Analyzer Programmer (ECAP) service tool can also be used in a limited capacity but it is no longer supported. ECAP uses small plug-in modules, called Service Program Modules (SPM), to adapt the basic tool to the specific Caterpillar electronic control application.There are several adapter cables, breakout T cables, probes, etc, that are used in order to access measurements of signals. A heavy duty multimeter is suitable for making the necessary measurements, a multimeter that is capable of measuring Duty Cycle may also be required. Other Special Tools include those needed to measure pressure or temperature. 3126B Service Tools Optional 3126B Service Tools Connecting ET (Electronic Technician)
The communications Adapter is powered by 12 volts DC from the vehicle battery. This permits operation beside the engine or in the cab of a truck, to allow use during vehicle operation.Use the following procedures to connect the service tool to the engine.1. Turn ignition key to the OFF position.2. The PC (with ET software installed) should be connected to the engine system through the Cab Diagnostics Connector. There are several types of cab connectors used. Determine the necessary Adapter Harness Assembly from the tool list for the vehicle you are working with. Connect the appropriate adapter to the Service Tool Harness Cable.3. Connect the opposite end of the Service Tool Harness Cable to the Communication Adapter (refer to diagrams for specific type).4. Connect the Communication Adapter to the PC using the appropriate cable as shown.5. Turn ignition key to the ON position to begin testing. The Service Tool will operate with the engine running, or with the engine OFF, ignition key ON. If the Tool does not communicate with the ECM, disconnect and reconnect the Cab Diagnostic Connector cable. Check communication, if the problem is still present refer to "PB-21: SAE J1587/1708 (ATA) Data Link Circuit Test" on page 194. The Service Tool may restart during engine cranking due to a voltage dip on the battery line. ET must be configured to communicate with the specific type of Communication Adapter used. Go to the "Preferences" menu located under "Settings" to select the appropriate communications device. Passwords
Factory Passwords
Factory passwords are required to perform each of the following