Electronic Control Analyzer Programmer (ECAP)
The Electronic Control Analyzer Programmer (ECAP) is available for use with later and current machines with the ARC system. The ECAP performs most of the troubleshooting and programming functions. These functions are usually performed by the display and the service switches of the ARC. In addition, the ECAP shows the tattletale and histogram information which is not accessible by using the service switches. The ECAP connects to the connector for the service tools that is located near the EPTC II. Refer to the Tool Operating Manual, SEHS9343, "Using the ECAP" for any further information or required materials.
Note: Service tools are required on current machines in order to access any mode rather than the normal mode. A service tool must be used to perform the functions of the service switches and the functions of accessing the diagnostic information.
Using the Caterpillar Electronic Technician (ET) to Determine the Diagnostic Codes
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| Illustration 1 | g00719115 |
Connections for the Communication Adapter II and the Electronic Technician (ET) (1) Caterpillar Electronic Technician software (2) Cable assembly (machine control to the Communication Adapter II) (3) 171-4400 Communication Adapter Group 2 (4) Cable assembly (serial cable to "DB-9" connector) | |
Note: Caterpillar Electronic Technician (ET) is a software program that can be used on an IBM compatible personal computer.
In order to use the Caterpillar Electronic Technician (ET), order the following materials: Special Publication, JERD2124, "ET Single Use Program License", Special Publication, JEHP1026, "Information and Requirements Sheet", 7X-1425 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 ET can be used to view diagnostic codes and the ET can be used to clear diagnostic codes. The process of determining the diagnostic codes is easier and faster by using the ET. The ET can also display information on the history of a diagnostic code and the parameter status of diagnostic codes. These features allow the ET to be a useful tool for troubleshooting.
The ET will communicate with the electronic control modules over the CAT data link. The service connector is located on the panel of the circuit breaker behind the seat of the operator. For more information and the locations of the connectors, see Testing and Adjusting, "Electrical Component and Connector Locations" and the Electrical System Schematic in your machine's Service Manual.
Connect the ET to the machine. Turn the key start switch to the RUN position. Start the ET. The ET will initiate communications with the electronic control modules on the machine. The ET will list the available electronic control modules on the machine after communication has been established. Choose the menu item "Brake". Use the ET in order to determine the diagnostic codes. Follow the troubleshooting procedures that correspond to the diagnostic codes. See Testing And Adjusting, "Troubleshooting Diagnostic Codes".
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| Illustration 2 | g00537931 |
Electronic Technician screen for available electronic control modules | |
Status Groups For ET
The ET will use status groups in order to display information about the status of the parameters. Select one of the status groups.
Control Service Tool
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| Illustration 3 | g00838438 |
(1) Mode switch (2) Clear switch (3) Scroll switch | |
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| Illustration 4 | g00834934 |
The 4C-8195 Control Service Tool with the 139-5210 Extension Cable is helpful for the service person to use on current machines. Current machines do not have the set and clear switches. The service tool has three cables with different connectors so that the service tool is usable on the different types of machine harnesses. The correct connector is connected to the service tool harness and to the extension cable. The extension cable is connected to the ARC control and to the ARC harness connector. Actuating the mode switch scrolls through the display modes. Actuating the scroll switch will cause the display to scroll while the control is in the service mode or numeric readout mode. Clear the service code by actuating the clear switch while the control is in the service mode. Actuate the clear switch when the ARC is in detected fault mode. This will clear all the extreme values.
Additional Tools
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| Illustration 5 | g00834917 |
(1) 9U-7330 Digital Multimeter (2) 7X-1710 Multimeter Probe | |
The following service tools should be used to make troubleshooting the electrical system easier.
- 9U-7330 Digital Multimeter
- 8T-3224 Needle Tip
- 7X-1710 Multimeter Probe
- 8T-8726 Adapter Cable As
- 6V-3000 Connector repair kit
- 190-8900 Connector repair kit
Use the 9U-7330 Digital Multimeter for making continuity checks or voltage measurements. The 7X-1710 Multimeter Probe is used to make measurements at the connector without disconnecting the connector. The probes are pushed in the back of the connector alongside the wire. The 8T-8726 Adapter Cable As is a three pin breakout cable that is used to make measurements in sensor circuits.
Note: Except for harness tests, using continuity testers such as the 8T-0500 Continuity Tester or voltage testers such as the 5P-7277 Voltage Tester is not recommended for today's Caterpillar electrical circuits.