System Operation Description:
This section contains steps that can be used to help determine the possible cause of erratic reports of interval. Check for active diagnostic codes for the PL522 or 523. Correct any diagnostic codes before proceeding. Visually inspect the following items for damage: PL522 or 523 module, antenna and cables. Verify that there are no loose connections.
The PL522 or 523 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 network for cellular communications is operational in the geographic area of concern. The network is operational when messages can travel to the satellite and the messages can be sent VisionLink.
- The PL522 or 523 system is correctly configured to communicate on the network for cellular communications. Correct configuration was verified during manufacturing tests.
- VisionLink is configured properly and the software is functioning.
The PL522 or 523 module should not be replaced without verifying that these issues have been investigated. Contact the AVSpare Technical Communicator for aid in resolving these issues.
Refer to the PL522 or 523 device configuration and status information in Systems Operation, Troubleshooting, Testing and Adjusting, RENR8143, "Diagnostic Capabilities" in order to ensure that the lack of reporting is not due to the power mode. The unit is likely to have been configured correctly if the SMH report is received.
There is a probability that the system GPS has failed. Proceed with the following steps in order to determine the cause.
Test Step 1. ACCESS THE PL522 or 523 THROUGH AVSpare ELECTRONIC TECHNICIAN (AVS ET ).
- Connect the Cat ET service tool to the machine.
- Verify that the ECM (VIMS Main Module) is present.
Expected Result:
The ECM (VIMS Main Module) is present.
Results:
- OK - The ECM (VIMS Main Module) is present. Proceed to Test Step 3.
- NOT OK - The ECM (VIMS Main Module) is not present in the Cat ET screen.
Repair: Verify that the wiring for the PL522 or 523 has been installed correctly. Check the wiring with a multimeter. If the ECM ( VIMS Main Module) is not present, refer to Systems Operation, Troubleshooting, Testing and Adjusting, "Electronic Service Tool Does Not Communicate with ECM".
STOP
Test Step 2. VERIFY IF THE MACHINE HAS MOVED
Verify if the machine has moved more than the configured minimum distance since the last known position report.
Expected Result:
The machine has not moved.
Results:
- OK - The machine has moved less than the configured minimum distance since the last known position report. Therefore, the machine has not sent any position reports.
STOP
- NOT OK - The machine movement is unknown. Proceed to Test Step 3.
Test Step 3. VERIFY THAT THE PRODUCT LINK MODULE IS IN POWER MODE 1.
- Select "Status Parameters" for Cat ET.
- 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 display "Power Mode 1". Proceed to Test Step 4.
- NOT OK - Cat ET screens are not correct. Proceed to Test Step 4.
Test Step 4. VERIFY THAT THE GPS RECEIVER FUNCTIONS.
- Select "GPS Information" for Cat ET.
- Verify that the "GPS Position Status" is "Valid".
- Verify that the GPS has calculated a location within the configured amount of time ("GPS Fix Validity Time Duration"). The "GPS Time Stamp" can be compared to the "PC Current Date/Time" in order to calculate the time since the last calculation of the position.
- Select "Status Parameters". Verify "GPS Receiver" states "Functional".
Expected Result:
The "GPS Position Status" is "Valid". The last calculation (GPS) of the position was within the configured amount of time ("GPS Fix Validity Time Duration") in "Power Mode 1".
Results:
- OK - The indications on the Cat ET screen are correct. The GPS Receiver is functioning properly. Proceed to Test Step 6.
- NOT OK - The indications on the "GPS Information" are incorrect. Proceed to Test Step 5.
- NOT OK - The indications on the "GPS Receiver" are not "Functional". Proceed to Test Step 5.
Test Step 5. VERIFY THAT THE CENTER CONDUCTOR OF THE ANTENNA HAS NOT SHORTED TO THE SHIELD OR BECOME AN OPEN CIRCUIT.
- Disconnect the connection of the GPS antenna at the module.
- Measure the resistance from the shield of the antenna cable to the conductor at the center of the cable. The shield is the threaded part of the connector.
Refer to Systems Operation, Troubleshooting, Testing and Adjusting, "Reports and Messages Not Available" for the following information:
- Illustrations that show the resistance checks
- Listing of resistance checks for the antenna
- Listing of resistance values
Expected Result:
The resistance for the GPS antenna meets the specifications that are defined in Systems Operation, Troubleshooting, Testing and Adjusting, "Reports and Messages Not Available".
Results:
- OK - The resistance is correct. Proceed to Test Step 6.
- NOT OK - The resistance is incorrect.
Repair: The antenna cable or the antenna has a short or open from the center conductor to the outer shield. Disconnect the cable from the antenna in order to isolate the problem. Replace the antenna assembly. Verify that the module is operating correctly.
STOP
Test Step 6. VERIFY TRANSMISSION OF A MESSAGE.
- Verify that the "Message Transmission Timestamp" is recent. If the time stamp indicates 1984, the module has never transmitted a message.
- Verify the "Cellular Network Coverage Status" within "GSM Information" of Cat ET.
- Go to the drop-down menu in the Cat ET and select "Service". Then select "PLM Commands" and "Fuel Report". Fuel report will provide a location update.
Results:
- OK - The PL522 or 523 appears to be operating properly. Verify that the message was successfully received at the office. Remember that the delay time is dependent on the configuration of the software at the office.
STOP
- NOT OK - There is a problem with the antenna or with the module. Do not replace the module until the antenna and cable are verified.
Repair: Refer to Troubleshooting, "Reports and Messages Not Available".
STOP