The following is a list of Diagnostic Trouble Codes (DTCs) that are associated with the window wiper delay circuit of the machine.
Machine ECM (MID 299) | |||
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J1939 | DTC | Code Description | System Response |
287-3 | Low Current Digital Output #7 : Voltage Above Normal | The window wiper system will fail to function when requested. | |
287-6 | Low Current Digital Output #7 : Current Above Normal | The window wiper system will fail to function when requested. | |
288-3 | Low Current Digital Output #8 : Voltage Above Normal | The window wiper system will fail to function when requested. | |
288-6 | Low Current Digital Output #8 : Current Above Normal | The window wiper system will fail to function when requested. |
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Illustration 1 | g06575542 |
Window Wiper Control schematic |
Note: The diagram above is a simplified schematic of the Switch Panel connections. The schematic is electrically correct. However, not all the possible harness connectors are shown. Refer to the latest revision of Electrical Schematic, M0116913 for 320D3 GC excavator electrical systems.
Diagnostic Trouble Code Procedure
Required Tools | |||
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Tool | Part Number | Description | Qty |
T1 | 146-4080(1) | Digital Multimeter Group | 1 |
8T-3224 | Needle Tip Group | 1 | |
7X-1710 | Multimeter Probe Group | 1 | |
8T-8726 | Cable Assembly (Three Pin) (3-Pin Breakout) | 1 | |
T2 | JERD2129 | Cat® Electronic Technician (Cat ET) | 1 |
Windows-based PC | 1 | ||
538-5051 | Communication Adapter Gp | 1 | |
T3 | 6V-4148 | Connector Repair Kit (Sure Seal) | 1 |
T4 | 190-8900 | Connector Field Repair Kit (Deutsch) | 1 |
T5 | 175-3700 | Connector Repair Kit Deutsch DT | 1 |
(1) | This multimeter can use an RS232C cable to connect to a Laptop computer or Dataview tool gp for troubleshooting. |
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.
- Identify the active FMI code associated with the faulty component.
- Determine which code is present and use the list below to determine the correct procedure to follow.
- FMI 3 diagnostic code, proceed to "FMI 3".
- FMI 6 diagnostic code, proceed to "FMI 6".
Check The Machine Harness For A Short | ||
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Troubleshooting Test Steps | Values | Results |
1. Turn the key start switch and the disconnect switch OFF. 2. Disconnect all harness connectors from the switch panel. 3. Disconnect the wiper control module from the machine harness. 4. At the switch panel, identify the wiper intermittent pin locations (refer to the schematic above). 5. Measure the resistance between the wiper intermittent connectors on the switch panel and all other contacts of the switch panel. |
Each reading is greater than 5K Ω. | Result: All measurements are greater than 5K Ω. Proceed to "Check If The Diagnostic Code Remains" Table 4. Result: Resistance is less than 5 Ω. A short exists between the signal circuit and the circuit with the low-resistance measurement. Repair: Repair or replace machine harness. Note: A resistance greater than 5 Ω but less than 5K Ω indicates a loose or corroded connection in the circuit. A resistance measurement greater than 5K Ω indicates an open in the circuit. Proceed to "Check If The Diagnostic Code Remains" Table 4. |
Check If The Diagnostic Code Remains | ||
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Troubleshooting Test Steps | Values | Results |
1. Reconnect all harness connectors. Return machine to normal operating condition. 2. Turn the key start switch and the disconnect switch ON. 3. Clear all diagnostic codes. 4. Operate the machine. 5. Stop the machine and engage the safety lock lever. 6. Check if the diagnostic code is active. |
The diagnostic code is no longer present. | Result: 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. Result: 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 AVSpare. This consultation may effect repair time. Follow the steps in Troubleshooting, "ECM - Replace" if the ECM needs to be replaced. STOP. |
Check The Control Module | ||
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Troubleshooting Test Steps | Values | Results |
1. Turn the key start switch and disconnect switch to the ON position. 2. Disconnect the wiper module from the machine harness. 3. At the machine harness for the wiper module, place a jumper wire between one of the intermittent wiper delay signals and ground. |
The diagnostic code is no longer active. | Result: The diagnostic code is no longer active. The wiper module has failed. Repair: Replace the wiper control module. Result: The diagnostic code remains active. Proceed to "Check The Signal Circuit For A Short To Ground" Table 6. |
Check The Signal Circuit For A Short To Ground | ||
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Troubleshooting Test Steps | Values | Results |
1. The key start switch and disconnect switch remain in the OFF position. 2. Remove the jumper wire that was installed in the previous test step. 3. Disconnect all harness connections at switch panel. 4. At the switch panel harness connector, measure the resistance between the signal contacts and all possible sources of ground. |
All resistance values are greater than 5K Ω. | Result: All resistance values are greater than 5K Ω. Proceed to "Check If The Diagnostic Code Remains" Table 7. Result: One or more readings are less than 5 Ω. Repair: The short is between the signal contact and the circuit with the low resistance. Repair or replace the machine harness. Note: A resistance that is greater than 5 Ω but less than 5K Ω would indicate a loose connection or a corroded connection in the circuit. A resistance measurement that is greater than 5K Ω would indicate an open in the circuit. Proceed to "Check If The Diagnostic Code Remains" Table 7. |
Check If The Diagnostic Code Remains | ||
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Troubleshooting Test Steps | Values | Results |
1. Reconnect all harness connectors. Return machine to normal operating condition. 2. Turn the key start switch and the disconnect switch to the ON position. 3. Clear all diagnostic codes. 4. Operate the machine. 5. Stop the machine and engage the safety lock lever. 6. Check if the diagnostic code is active. |
The diagnostic code is no longer present. | Result: 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. Result: 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 AVSpare. This consultation may effect repair time. Follow the steps in Troubleshooting, "ECM - Replace" if the ECM needs to be replaced. STOP. |