Component - Test
Remote Control Transceiver - Test
The following is a list of codes that are associated with the Remote Control Transceiver of the Command for Dozing Operator Console system.
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| Remote Control ECM (MID 126) | ||
|---|---|---|
| DTC | Code Description | System Response |
| 3264-03 | Primary Remote Control Transceiver - Voltage Above Normal | When the condition to cause 3264-3 occurs, E1912 shall also be raised. Machine Shutdown. |
| 3264-04 | Primary Remote Control Transceiver - Voltage Below Normal | Machine Shutdown May occur. Machine stop and low idle will occur. RC Operation is not allowed. |
| 3264-06 | Primary Remote Control Transceiver - Current Above Normal | Machine Shutdown May occur. Machine stop and low idle will occur. RC Operation is not allowed. |
The 3264 is the CID related to the Remote Control Operator Console Transceiver. When a diagnostic FMI, 3, 4 or 6 occurs a mismatch has occurred between the CAN message (on RC CAN) between the console transceiver and the diagnostic wire from Transceiver (Tx) to RCM (Rx). Proper Operation of the diagnostic wire will deliver 24V from the Transceiver (Tx) to RCM (Rx) when E-Stop is not pressed, and 0V when E-Stop is pressed.
Possible causes for an FMI 3 diagnostic code are:
- The Diagnostic wire from Transceiver (Tx) to RCM (Rx) is sensed (at the RCM) as high or receiving 16V when the CAN message is reporting E-Stop (when the Circuit should be at 0V)
Possible causes for an FMI 4 diagnostic code are:
- The Diagnostic wire from Transceiver (Tx) to RCM (Rx) is sensed (at the RCM) as low or receiving 0V when the CAN message is not reporting E-Stop (when the Circuit should be at 16V)
Possible causes for an FMI 6 diagnostic code are:
- The Diagnostic wire from Transceiver (Tx) to RCM (Rx) is sensed (at the Transceiver) as Shorted at any time. This is sensed at the Transceiver then raised at the RCM via CAN message
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| Illustration 1 | g06272305 |
|
RC transceiver mini schematic | |
Note: The diagram above is a simplified schematic of the Transceiver to RCM diagnostic wire. The schematic is electrically correct. However, not all the possible harness connectors are shown. Refer to the latest revision for the complete schematic:
Diagnostic Trouble Code Procedure
Note: Prior to beginning this procedure, inspect the harness connectors that are involved in this circuit. Poor connections can often be the cause of a problem in an electrical circuit. Verify that all connections in the circuit are clean, secure, and in good condition. If a problem with a connection is found, correct the problem and verify that the diagnostic code is active before performing a troubleshooting procedure.
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| FMI 03 Troubleshooting | ||
|---|---|---|
| Troubleshooting Test Steps | Values | Results |
| 1. Check The Harness For A Short To Battery A. Turn the key start switch and disconnect switch OFF. B. Disconnect the machine harness connector from the transceiver. C. Disconnect the machine harness connectors from the ECM. D. At the ECM machine harness connector, measure the resistance between all the other contacts that are used in the ECM and Battery+. |
Each resistance measurements are greater than 5KΩ. |
OK - All resistance measurements are greater than 5K Ω. Proceed to Test Step 2. NOT OK - The resistance is less than 5K Ω. There is a short between the diagnostic circuit and another circuit. Repair: Repair or replace the machine harness. Proceed to Test Step 3. |
| 2. Check The Transceiver A. Turn the key start switch and disconnect switch OFF. B. Disconnect the machine harness connector from the transceiver. C. On the Transceiver, measure the resistance between the Pin C (L906) and all other Pins. |
Each resistance measurements are greater than 5KΩ. |
OK - All resistance measurements are greater than 5K Ω. Proceed to Test Step 3. NOT OK - The resistance is less than 5K Ω. One or more of the measurements was incorrect. Repair: Replace the Transceiver. Proceed to Test Step 3. |
| 3. Check If The Diagnostic Code Remains A. Reconnect all harness connectors. Return machine to normal operating condition. B. Turn the key start switch and the disconnect switch ON. C. Clear all diagnostic codes. D. Operate the machine. E. Stop the machine and engage the safety lock lever. F. Check if the diagnostic code is active. |
The diagnostic code is no longer present. |
OK - The diagnostic code does not exist currently. The initial diagnostic code may have been caused by poor electrical connection or short at one of the harness connections. Resume machine operation. STOP. NOT OK - The diagnostic trouble code has not been corrected. If the diagnostic code has not been corrected after performing the procedure a second time, the ECM may require replacement. Prior to replacing the ECM, always contact the Technical Communicator at your dealership for possible consultation with Caterpillar. This consultation may effect repair time. Follow the steps in Troubleshooting, "ECM - Replace" if the ECM needs to be replaced. STOP. |
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| FMI 04 Troubleshooting | ||
|---|---|---|
| Troubleshooting Test Steps | Values | Results |
| 1. Check The Harness For A Open A. Turn the key start switch and the disconnect switch to the OFF position. B. Disconnect the machine harness connectors from the RCM. C. Disconnect the machine harness connectors from the Transceiver. D. Perform a continuity test at the harness connector for the transceiver to the Remote control ECM Connect on L906 |
The resistance measurements are less than 5Ω. |
OK - The resistance measurements are less than 5Ω. Proceed to Test Step 2. NOT OK - The resistance reading for the (N/O) and (N/C) circuits greater than 5 Ω. There is an open in one of the circuit. Repair: Repair or replace the machine harness for an open circuit or high resistance in the circuit. Proceed to Test Step 5. |
| 2. Check The Transceiver for Incorrect Battery Voltage A. The harness connectors for the RCM and are connected and the Transceiver is disconnected. Battery Switch and Remote Control Enable is on. B. Check Remote Control Battery Voltages at the Transceiver (R131). |
Remote Control Battery Voltage at the Transceiver matches Battery Voltage at the rest of the machine (24V). |
OK -The Remote Control Battery voltage measurements are within 2V of the machine voltage . Proceed to Test Step 3. NOT OK - The difference in voltage is greater than 2V. There is a poor connection between the Battery Voltage and Remote Control Battery Voltage. Remote Control Voltage is supplied through the Remote Control Enable Switch. Repair: Troubleshoot the poor connection, Repair, or replace the machine harness. Proceed to Test Step 5. |
| 3. Check The Transceiver Ground Circuit A. The Remote Control Enable switch and disconnect switch remain in the OFF position. B. The Transceiver remains disconnected from the harness . C. Measure the resistance between the ground on the harness to frame ground and battery. D. Perform a continuity test at the harness connector for the transceiver to the Remote control ECM Connect on L906 |
The resistance measurement is less than 5Ω. |
OK - The resistance measurement is less than 5Ω. Proceed to Test Step 4. NOT OK - The resistance is greater than 5K Ω. The ground circuit is open. Repair: Troubleshoot the poor connection, Repair, or replace the machine harness. Proceed to Test Step 5. |
| 4. Check The Transceiver A. Transceiver is connected. B. The Remote Control switch and the battery disconnect switch remain in the ON position. C. Remote Control Console is powered up but machine is not in control of the machine. D. Measure the output voltage of the diagnostic wire on the Transceiver. |
Diagnostic Voltage at the Transceiver is 16V +/- 2V. |
OK - The measurements are correct. Proceed to Test Step 5. NOT OK - The measurement was incorrect. Repair: Replace the Transceiver. Proceed to Test Step 5. |
| 5. Check If The Diagnostic Code Remains A. Reconnect all harness connectors. Return machine to normal operating condition. B. Turn the key start switch and the disconnect switch ON. C. Clear all diagnostic codes. D. Operate the machine. E. Stop the machine and engage the safety lock lever. F. Check if the diagnostic code is active. |
The diagnostic code is no longer present. |
OK - The diagnostic code does not exist currently. The initial diagnostic code may have been caused by poor electrical connection or short at one of the harness connections. Resume machine operation. STOP. NOT OK - The diagnostic trouble code has not been corrected. If the diagnostic code has not been corrected after performing the procedure a second time, the ECM may require replacement. Prior to replacing the ECM, always contact the Technical Communicator at your dealership for possible consultation with Caterpillar. This consultation may effect repair time. Follow the steps in Troubleshooting, "ECM - Replace" if the ECM needs to be replaced. STOP. |
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| FMI 06 Troubleshooting | ||
|---|---|---|
| Troubleshooting Test Steps | Values | Results |
| 1. Check The Harness For A Short To Battery A. Turn the key start switch and disconnect switch OFF. B. Disconnect the machine harness connector from the transceiver. C. Disconnect the machine harness connectors from the ECM. D. At the RCM harness connector, measure the resistance between all the other contacts that are used in the RCM and Battery+. E. At the Transceiver harness, measure the resistance between all the other contacts used in the Transceiver and Battery +. |
Each resistance measurements are greater than 5KΩ. |
OK - All resistance measurements are greater than 5K Ω. Proceed to Test Step 2. NOT OK - The resistance is less than 5K Ω. There is a short between the diagnostic circuit and another circuit. Repair: Repair or replace the machine harness. Proceed to Test Step 3. |
| 2. Check The Transceiver A. Turn the key start switch and disconnect switch OFF. B. Disconnect the machine harness connector from the transceiver. C. On the Transceiver, measure the resistance between the Pin C (L906) and all other Pins. |
Each resistance measurements are greater than 5KΩ. |
OK - All resistance measurements are greater than 5K Ω. Proceed to Test Step 3. NOT OK - The resistance is less than 5K Ω. One or more of the measurements was incorrect. Repair: Repair or replace the Transceiver. Proceed to Test Step 3. |
| 3. Check If The Diagnostic Code Remains A. Reconnect all harness connectors. Return machine to normal operating condition. B. Turn the key start switch and the disconnect switch ON. C. Clear all diagnostic codes. D. Operate the machine. E. Stop the machine and engage the safety lock lever. F. Check if the diagnostic code is active. |
The diagnostic code is no longer present. |
OK - The diagnostic code does not exist currently. The initial diagnostic code may have been caused by poor electrical connection or short at one of the harness connections. Resume machine operation. STOP. NOT OK - The diagnostic trouble code has not been corrected. If the diagnostic code has not been corrected after performing the procedure a second time, the ECM may require replacement. Prior to replacing the ECM, always contact the Technical Communicator at your dealership for possible consultation with Caterpillar. This consultation may effect repair time. Follow the steps in Troubleshooting, "ECM - Replace" if the ECM needs to be replaced. STOP. |
All Stop (ASTOP) Transceiver - Test
The following is a list of codes that are associated with the All Stop (ASTOP) Transceiver of the Command for Dozing Operator Console system.
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| Remote Control ECM (MID 126) | ||
|---|---|---|
| DTC | Code Description | System Response |
| 4701 - 12 | All Stop Transceiver - Bad Device or Component | Machine Shutdown May occur. Machine stop and low idle will occur. RC Operation is not allowed. |
Diagnostic Trouble Code Procedure
Note: Prior to beginning this procedure, inspect the harness connectors that are involved in this circuit. Poor connections can often be the cause of a problem in an electrical circuit. Verify that all connections in the circuit are clean, secure, and in good condition. If a problem with a connection is found, correct the problem and verify that the diagnostic code is active before performing a troubleshooting procedure.
This diagnostic code is recorded when the Remote Control ECM is unable to communicate properly with the ASTOP Transceiver through the Remote Control CAN link.
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| FMI 12 Troubleshooting | ||
|---|---|---|
| Troubleshooting Test Steps | Values | Results |
| 1. VERIFY THAT THE DIAGNOSTIC CODE IS PRESENT A. Check whether MID 126 CID 4701 FMI 12 is present. |
The diagnostic code is not present. |
OK - The diagnostic code is NOT present. Repair: The initial diagnostic code was probably caused by a poor electrical connection. There could have been a short at one of the harness connectors that was disconnected and then reconnected. Check the connectors and harness for any visual damage. Stop NOT OK - The diagnostic code is present. Repair: The receiver may have failed. Inspect the harness and connectors. If the cause of the diagnostic code is not found, replace the receiver. Stop |
Caterpillar Information System:
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