Usage:
The ECM provides output pins that are dedicated to the communication data links. The data links are available to share data between the ECM, electronic service tools, and electronic display modules.
Optional Remote Electronic Service Tool Connector
The optional electronic service tool connector is installed by the customer or the Original Equipment Manufacturer (OEM).
Table 22: Parts for Optional Electronic Service Tool Connector
The Electronic Service Tool will operate when the engine is running. The Electronic Service Tool will also operate when the engine is not running, but with the ignition switch in the ON position.
Figure 38 - Schematic of Data Link Connections for the Remote Service Tool
The Negative Battery Bus Bar circuit on the Remote Electronic Service Tool Connector pin B must be connected directly to the Negative Battery Bus Bar. This circuit must not be connected to the negative battery terminal through any other path.
The wires for the CDL and ATA data links should be 143-5018 Cable (Twisted Pair). The wire pair should have a minimum of one twist per 25 mm (1 inch). The length of the wire between the remote electronic service tool and the Customer Connector J3 should not exceed 30 mm (98.4 ft).
NOTE: Refer to "J1939 (CAN) Data Link" for the correct installation procedure for this circuit.
ATA Data Link
The electronic control system has a standard data link available. This data link is supported by the American Trucking Association (ATA). The ATA Data Link conforms to SAE J1587 and SAE J1708.
Table 23: SAE J1587 Data Link Broadcast Parameters
J1939 (CAN) Data Link
The Controller Area Network (CAN) Data Link complies with SAE J1939. This data link is used to communicate engine information to a J1939 receiving device (display module).
Table 24: Required Parts for a Single Module.
Table 25: Required Parts for Additional Modules.
Figure 39 - CAN Data Link Modules
The following requirements must be met for installation of modules on the CAN data link:
- * 153-2707 Cable (Shielded Twisted Pair) must be used for all CAN data link runs.
- * The total length of the data link run must not exceed 40 m (130 ft).
- * All splices into the data link require a 133-0970 Receptacle As (Tee).
- * A 174-3016 Receptacle As (Termination Resistor) must be installed at the end of the data link in order to ensure proper operation.
- * The total length of the data link run must not exceed 40 m (130 ft).
NOTE: A termination resistor for the CAN data link is included in the Caterpillar supplied wiring harness to the J61 customer connector for current engines. One additional termination resistor must be installed at the end of the data link run. Older engines do not have a factory installed termination resistor in the wiring harness. A termination resistor must be installed on both ends of the data link in order to ensure proper operation.
Use the following procedure to connect modules to the CAN data link:
Figure 40 - CAN Connection to P3 Connector
Figure 41 - Socket for CAN Data Link
1. Run the CAN data link from the P3 Customer connector to a module.
NOTE: Older engines do not have a factory installed termination resistor in the wiring harness. A termination resistor must be installed on both ends of the data link in order to ensure proper operation.
NOTE: The end of the data link must be within approximately 150 mm (6 inch) of the module. The total length of the data link run must not exceed 40 m (130 ft).
a. Run 153-2707 Cable (Shielded Twisted Pair) from the P3 customer connector to the location of the first module. Cut the cable to length.
b. Remove 25 mm (1.0 inch) of insulation from both ends of the cable.
c. Remove 7 mm (0.28 inch) of insulation from each end of the green wire and the yellow wire.
d. Crimp a 186-3736 Connector Socket on each end of the green wire and the yellow wire with a 1U-5804 Crimp Tool.
e. Crimp a 133-0969 Connector Socket (Extended) on each end of the shield with a 1U-5804 Crimp Tool.
f. Cut two 30 mm (1.2 inch) pieces of 5P-6001 Heat Shrink Tubing. Slide a piece of the heat shrink tubing over the shield at each end of the cable. Position the heat shrink tubing so that 1 cm (0.4 inch) of the socket is covered and the remaining tubing is covering the shield. Apply heat until a complete seal is formed around the shield and the socket. Be careful to avoid skin contact with any hot glue that may seep from the heat shrink tubing.
g. Cut two 50 mm (2 inch) pieces of 125-7876 Heat Shrink Tubing. Slide a piece of the heat shrink tubing over each end of the cable.
h. Insert the wires from one end of the data link into the P3 Customer connector.
Table 26: Terminal Locations in P3
i. Position the 125-7876 Heat Shrink Tubing so that 20 mm (0.8 inch) of the exposed wires are covered and the rest of the heat shrink tubing is over the cable. Apply heat until a complete seal is formed. Be careful to avoid skin contact with any hot glue that may seep from the heat shrink tubing.
j. Insert the sockets at the opposite end of the CAN data link into a 174-0503 Connecting Plug Kit. Insert the blue wedge into the connector in order to secure the terminals in place.
Table 27: Terminal Locations in the Plug
k. Position the 125-7876 Heat Shrink Tubing so that 10 mm (0.4 inch) of the plug is covered and the rest of the heat shrink tubing is over the cable. Apply heat until a complete seal is formed around both the plug and the cable. Be careful to avoid skin contact with any hot glue that may seep from the heat shrink tubing.
l. Plug the end of the data link into the single end of a 133-0970 Receptacle As (Tee).
Figure 42 - Tee to Tee Connection
2. Run the data link from the tee to another tee for an additional module.
NOTE: For single module installations, proceed to Step 3.
NOTE: The end of the data link must be within approximately 150 mm (6 inch) of the module. The total length of the data link run must not exceed 40 m (130 ft).
a. Run 153-2707 Cable (Shielded Twisted Pair) from the tee to the location of the next module. Cut the cable to length.
b. Remove 25 mm (1.0 inch) of insulation from both ends of the cable.
c. Remove 7 mm (0.28 inch) of insulation from each end of the green wire and the yellow wire.
d. Crimp a 186-3736 Connector Socket on each end of the green wire and the yellow wire with a 1U-5804 Crimp Tool.
e. Crimp a 133-0969 Connector Socket (Extended) on each end of the shield with a 1U-5804 Crimp Tool.
f. Cut two 30 mm (1.2 inch) pieces of 5P-6001 Heat Shrink Tubing. Slide a piece of the heat shrink tubing over the shield at each end of the cable. Position the heat shrink tubing so that 10 mm (0.4 inch) of the socket is covered and the remaining tubing is covering the shield. Apply heat until a complete seal is formed around the shield and the socket. Be careful to avoid skin contact with any hot glue that may seep from the heat shrink tubing.
g. Cut two 50 mm (2 inch) pieces of 125-7876 Heat Shrink Tubing. Slide a piece of the heat shrink tubing over each end of the cable.
h. Install a 174-0503 Connecting Plug Kit on each end of the cable. Insert the blue wedge into the connector in order to secure the terminals in place.
Table 28: Terminal Locations in the Plug
i. Position the 125-7876 Heat Shrink Tubing so that 10 mm (0.4 inch) of the plug is covered and the rest of the heat shrink tubing is over the cable. Apply heat until a complete seal is formed around both the plug and the cable. Be careful to avoid skin contact with any hot glue that may seep from the heat shrink tubing. Perform this process on both ends of the cable.
j. Plug one end of the new cable into one of the openings in the existing tee. Plug the other end of the new cable into the single end of a 133-0970 Receptacle As (Tee) for the additional module.
k. If you are installing additional modules, repeat Step 2 for each module.
Figure 43 - Tee to Module Connection
3. Connect a receiving module to the tee.
b. Cut a 50 mm (2 inch) piece of 125-7876 Heat Shrink Tubing. Slide the heat shrink tubing over the module end of the cable assembly.
NOTE: Do not connect the shield to the receiving module.
c. Connect the green wire J1939 Data- and connect the yellow wire J1939 Data+ from the end of the cable assembly to the appropriate terminals on the plug for the module.
d. Trim the shield back to the existing heat shrink tubing on the cable assembly. Position the 125-7876 Heat Shrink Tubing so that the shield is completely insulated and a proper seal can be obtained. Apply heat until a complete seal is formed. Be careful to avoid skin contact with any hot glue that may seep from the heat shrink tubing.
e. Repeat Step 3 for each module.
4. Connect the J42 Service Tool connector.
a. Run 153-2707 Cable (Shielded Twisted Pair) from the last 133-0970 Receptacle As (Tee) to the J42 Service Tool connector. Cut the cable to length.
NOTE: The total length from the 133-0970 Receptacle As (Tee) to the Communications Adapter should be no more than 1.00 m (3.25 ft).
b. Remove 25 mm (1.0 inch) of insulation from both ends of the cable.
c. Remove 7 mm (0.28 inch) of insulation from each end of the green wire and the yellow wire.
d. Crimp a 186-3736 Connector Socket on each end of the green wire and the yellow wire with a 1U-5804 Crimp Tool.
e. Crimp a 133-0969 Connector Socket (Extended) on each end of the shield with a 1U-5804 Crimp Tool.
f. Cut two 30 mm (1.2 inch) pieces of 5P-6001 Heat Shrink Tubing. Slide a piece of the heat shrink tubing over the shield at each end of the cable. Position the heat shrink tubing so that 1 cm (0.4 inch) of the socket is covered and the remaining tubing is covering the shield. Apply heat until a complete seal is formed around the shield and the socket. Be careful to avoid skin contact with any hot glue that may seep from the heat shrink tubing.
g. Cut two 50 mm (2 inch) pieces of 125-7876 Heat Shrink Tubing. Slide a piece of the heat shrink tubing over each end of the cable.
h. Insert the wires from one end of the data link into the J42 Service Tool connector.
Table 29: Terminal Locations in J42
i. Position the 125-7876 Heat Shrink Tubing so that 20 mm (0.8 inch) of the exposed wires are covered and the rest of the heat shrink tubing is over the cable. Apply heat until a complete seal is formed. Be careful to avoid skin contact with any hot glue that may seep from the heat shrink tubing.
j. Insert the sockets at the opposite end of the CAN data link into a 174-0503 Connecting Plug Kit. Insert the blue wedge into the connector in order to secure the terminals in place.
Table 30: Terminal Locations in the Plug
k. Position the 125-7876 Heat Shrink Tubing so that 10 mm (0.4 inch) of the plug is covered and the rest of the heat shrink tubing is over the cable. Apply heat until a complete seal is formed around both the plug and the cable. Be careful to avoid skin contact with any hot glue that may seep from the heat shrink tubing.
5. Connect a termination resistor to the tee at the end of the data link.
Table 31: CAN Data Link Parameters
CAT Data Link
The CAT Data Link is a proprietary communication medium. The CAT Data Link is for communication with other Caterpillar microprocessor based devices such as the Electronic Control Module, Engine Monitoring System (EMS), Global Positioning System (GPS), Engine Vision Interface Module (EVIM), Cat ET, etc.
Data Loops
A device that is incorrectly wired or incorrectly connected to the CAT Data Link will result in a data loop that will cause the CAT Data Link to function improperly.
The following precautions will help prevent data loops and improve reliability of the data link system:
- * Use 143-5018 Cable (Twisted Pair) for connecting components to the data link.
- * Use a dedicated terminal strip for data link connections.
- * Terminate all wires at terminal strips.
- * Locate the terminal strip so that the length of the wire between data link connections is minimized.
- * The total length of data link wires should not exceed 30 m (100 ft).
- * Only one set of twisted pair data wires should be installed to the bridge displays.
- * The data link wires should be installed from the terminal strip in the engine room to the first station. Only one set of twisted pair data link wires should be run to the bridge displays.
- * If a second station utilizes a Caterpillar display group, the data link wires should be installed from the engine room terminal strip to the first stations and continued from the first station to the second station.
- * Do not splice wires.
- * Do not solder wires.
- * Use a dedicated terminal strip for data link connections.
CAT Data Link Installation
Figure 44 - Schematic of CAT Data Link Connections
