320D3 GC Excavators Machine Electronic Control System Window Wiper Delay - Test Caterpillar


Window Wiper Delay - Test
`
1.1. Machine ECM
2.1. Diagnostic Trouble Code Procedure
3.1. FMI 3
4.1. FMI 6

Machine ECM

The following is a list of Diagnostic Trouble Codes (DTCs) that are associated with the window wiper delay circuit of the machine.

Table 1
Machine ECM (MID 299) 
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. 


Illustration 1g06575542
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

Table 2
Required Tools 
Tool  Part Number  Description  Qty 
T1  146-4080(1)  Digital Multimeter Group 
8T-3224 Needle Tip Group 
7X-1710 Multimeter Probe Group 
8T-8726 Cable Assembly (Three Pin) (3-Pin Breakout) 
T2  JERD2129  Cat® Electronic Technician (Cat ET) 
Windows-based PC 
538-5051 Communication Adapter Gp 
T3  6V-4148  Connector Repair Kit (Sure Seal) 
T4  190-8900  Connector Field Repair Kit (Deutsch) 
T5  175-3700  Connector Repair Kit Deutsch DT 
(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.

  1. Identify the active FMI code associated with the faulty component.

  2. 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".

FMI 3

Table 3
Check The Machine Harness For A Short 
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. 

Table 4
Check If The Diagnostic Code Remains 
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

FMI 6

Table 5
Check The Control Module 
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. 

Table 6
Check The Signal Circuit For A Short To Ground 
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. 

Table 7
Check If The Diagnostic Code Remains 
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

Information System:

320D3 GC Excavators Machine Electronic Control System Switch Circuits - Test
320D3 GC Excavators Machine Electronic Control System Solenoid Valve - Test
3512E Locomotive Engines Catalyst (SCR) - Install
320D3 GC Excavators Machine Electronic Control System Sensor Supply - Test
320D3 GC Excavators Machine Electronic Control System Sensor Signal (PWM) - Test
320D3 GC Excavators Machine Electronic Control System Sensor Signal (Analog, Passive) - Test
320D3 GC Excavators Machine Electronic Control System Sensor Signal (Analog, Active) - Test
320D3 GC Excavators Machine Electronic Control System Relay - Test
320D3 GC Excavators Machine Electronic Control System Engine Speed Control - Test
Loader Calibration may Fail on Certain 432 and 444 Back Hoe Loaders {7000, 7490, 7610, 7620}
374 Hydraulic Excavator Machine Systems Cab - Remove and Install
910, 914 and 920 Compact Wheel Loader Power Train Axle (Rear) - Assemble
320D3 GC Excavators Machine Electronic Control System Connector Contact Description
320D3 GC Excavators Machine Systems Specifications Stick Cylinder
320D3 GC Machine System Swing Motor - Disassemble
320D3 GC Machine System Swing Motor - Assemble
335 Hydraulic Excavator Machine Systems Blade - Remove and Install
335 Hydraulic Excavator Machine Systems Recoil Spring - Disassemble
335 Hydraulic Excavator Machine Systems Recoil Spring - Assemble
M314, M315, M316, M318, M319, and M320 Wheeled Excavator Machine System Calibrations (Cat ET)
Improved Push Button Switch Group (HORN) Is Now Used on Certain Cat Products {1435, 7332}
New EC520 Controller Software is Now Available for Cat GRADE System {7620}
320D3 and 323D3 Excavators Machine System Specifications Hydraulic Tank and Filter
320D3 GC Machine System Pressure Switch (Refrigerant Pressure Cutoff) - Remove and Install