26SI Series Alternator – Reporting Interval Erratic

System Operation Description:

There are problems that could be reported with the Product Link system but the problems are not caused by the Product Link system. The problem can be described as the intervals between reports are erratic. This section contains steps that are used to determine the possible cause. Check for active diagnostic codes for the Product Link. Correct any diagnostic codes before proceeding. The following items should be visually inspected for damage: PL121SR radio, module, antenna and cables. Verify that there are no loose connections.

The Product Link system depends on several communication links in order to transfer data from the machine to the office. The following procedures assume that these communication links are operating properly. The proper communication links are listed below:

  • The satellite network for VHF communications is operational in the geographic area of concern. The network is operational when messages can travel to the satellite and the messages can travel to the earth and Caterpillar.

  • The Product Link system is correctly configured to communicate on the network for VHF communications.

  • The worldwide network of Caterpillar’s computers is passing messages to software for the Caterpillar Equipmentmanager (EM).

  • The Caterpillar Electronic Technician (Cat ET) is configured properly and the software is functioning.

The PL300 module or the PL121SR radio should not be replaced without verifying that these issues have been investigated. Contact your Caterpillar Technical Communicator for aid in resolving these issues.

Test Step 1. ACCESS THE PRODUCT LINK THROUGH THE CAT ET SERVICE TOOL.

  1. Connect the Cat ET service tool to the machine.
  1. Verify that the ECM (Product Link) is available.

Expected Result:

The ECM (Product Link) is available.

Results:

  • OK – The ECM (Product Link) is available. Proceed to Test Step 2.

  • NOT OK – The ECM (Product Link) is not present in the screen for the Cat ET service tool.

    Repair: Verify that the wiring for the Product Link has been installed correctly. Check the wiring with a multimeter. If the ECM (Product Link) is not available, refer to Systems Operation, Troubleshooting, Testing and Adjusting, “Electronic Service Tool Does Not Communicate with ECM”.

    STOP

Test Step 2. VERIFY THAT THE PRODUCT LINK HAS NOT BEEN TURNED OFF.

  1. Select “Status Parameters” for Cat ET.
  1. Verify that the ” Possible Device Power Disconnection” is labeled as “No”.

Expected Result:

“Possible Device Power Disconnection” is labeled as “No”.

Results:

  • OK – The “Possible Device Power Disconnection” is labeled as “No”. The Product Link has operated since successfully transmitting the last report. Proceed to Test Step 3.

  • NOT OK – “Possible Device Power Disconnection” is labeled as “Yes”. The Product Link has been disconnected from power and transmissions have been prevented. This could explain the failure to get any messages. Proceed to Test Step 3 in order to verify proper operation.

Test Step 3. DETERMINE IF THE PRODUCT LINK SYSTEM HAS BEEN IN AN AREA OF BLOCKED COMMUNICATIONS.

  1. Select “Status Parameters” for Cat ET.
  1. Verify that the “Possible Periods of Communications Blockage” is “No”.

Expected Result:

“Possible Periods of Communications Blockage” is “No”.

Results:

  • OK – The Product Link has seen satellites since the transmission of the last report. Verify that the machine has a clear view of the sky. Proceed to Test Step 5.

  • NOT OK – Product Link has experienced blocked communications. Transmissions have been prevented. This could explain the failure to get any messages. Verify that the machine has a clear view of the sky. Proceed to Test Step 4.

Test Step 4. VERIFY THAT THE PRODUCT LINK IS IN POWER MODE 1.

  1. Select “Status Parameters” for Cat ET.
  1. Verify that the “Power Mode Status” is “Power Mode 1”. Verify that the “Key Switch Status” is “On”.

Expected Result:

The machine is in “Power Mode 1” and “Key Switch On”.

Results:

  • OK – The screens for Cat ET are correct. Proceed to Test Step 5.

  • NOT OK – The screens for Cat ET are not correct. A report of the position is sent in “Power Mode 2” and in “Power Mode 3” when the machine moves more than the “Position Report Minimum Location Change”. Even if this explains the current reports that are arriving at the office, proceed to 5.

Test Step 5. VERIFY THAT THE PRODUCT LINK MODULE MONITORS THE “MACHINE RUN STATUS” PROPERLY.

  1. Go to “Status Parameters” for Cat ET.
  1. Start the machine.
  1. Verify that the “Power Mode Status” changes to ” Power Mode 1″.
  1. Verify the “Alternator Running Input” switches to “Engine Running”.
  1. Verify that the “Key Switch Status” is “On”.

Expected Result:

The status screen for Cat ET changes to “Power Mode 1” and “Engine Running”. The “Key Switch Status” should be “On”.

Results:

  • OK – The screens for Cat ET are correct. The Product Link should send four position reports and one Standard Report daily until the Power Mode changes to “Power Mode 2”. The power mode can be viewed in CPLS. Proceed to Test Step 6.

  • NOT OK – The screen for Cat ET shows “Engine Off”.

    Repair: Verify that the Alternator R-Terminal wiring has not been damaged. It is likely that the machine SMU and Product Link SMH no longer match. Refer to Systems Operation, Troubleshooting, Testing and Adjusting, “Operating Hours Discrepancy”.

    STOP

  • NOT OK – The screen Cat ET shows “Power Mode 2” or “Power Mode 3”.

    Repair: Verify that the wiring for the switched power (308-YL) is correct. Repair the wiring.

    STOP

Test Step 6. CHECK THE INSTALLATION OF THE ANTENNA.

Observe installation of the antenna for the Product Link. Verify that the antenna is installed with a clear view of the sky. The antenna must be in a location that is free from interference. Examples of interference include the following items: devices on the roof of the machine that emit power, other antennas that are close to the antenna for the Product Link, indoor machine, machine under large signs that are lighted and machine under power lines.

Expected Result:

The antenna is installed on the highest point on the machine. There is a clear view of the sky.

Results:

  • OK – The antenna for the Product Link is installed properly. Verify that all of the connections for the antenna are tight. A test message can be sent in order to verify communications. Monitor the performance of the communication in order to verify that reports are not erratic.STOP

  • NOT OK – Installation of the antenna is not optimal. Accept the current performance of the communication or reinstall the antenna at a superior location.STOP
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