CAP 5469226 - Caterpillar

Machine ECM
The following is a list of Diagnostic Trouble Codes (DTCs) that are associated with the window washer switch of the machine.
Table 1
Machine ECM (MID 299)
DTC Code Description System Response
2913-3 Window Washer Switch : Voltage Above Normal Switch will not function.
2913-6 Window Washer Switch : Current Above Normal Switch will not function. The Window Washer Switch has one input to the switch panel. The input is normally open. When a circuit is measured with a voltmeter, an open circuit will measure approximately 8 VDC to ground. A closed circuit will measure approximately 0 VDC to ground.The diagnostic code is recorded when the status of the switch is open at all times.Possible Causes for an FMI 3 Diagnostic code are:
The ground wire is open.
The switch has failed.
The ECM has failed. A failure of the Machine ECM is unlikely.Possible Causes for an FMI 6 Diagnostic code are:
A short to ground.
The switch has failed.
The ECM has failed. A failure of the Machine ECM is unlikely.
Illustration 1 g03420641
Connections of the Window Washer Switch
Note: The diagram above is a simplified schematic of the wiper control connections. The schematic is electrically correct. However, not all of the possible harness connectors are shown. Refer to the latest revision of the machine Electrical Schematic.Note: The following test procedure may create other diagnostic trouble codes. Ignore these created diagnostic trouble codes and clear the diagnostic trouble codes when the original diagnostic trouble code has been corrected.Note: The switch in this circuit is enclosed in the Switch Panel. The switch for this circuit is not independently serviceable. The switch module must be replaced if the switch fails.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. Check the wiring for pinch points or abrasions. Look for and repair areas that indicate wires are exposed. If a problem with a connection is found, correct the problem and verify that this diagnostic code is active before performing a troubleshooting procedure.
Table 2
Troubleshooting Test Steps Values Results
1. Identify Active FMI Code Associated With Sensor Circuit
Code present. FMI 3 diagnostic code, proceed to Test Step 2.
FMI 6 diagnostic code, proceed to Test Step 4.
Begin Process For FMI 3 Troubleshooting HERE
2. Check The Ground Circuit For An Open
A. Turn the disconnect switch and the key start switch OFF.
B. Disconnect the washer switch from the machine harness.
C. Measure the resistance between frame ground and the "washer" contact on the switch panel.
The resistance is greater than 5K Ω. OK - The resistance is greater than 5K Ω.
Proceed to Test Step 3.
NOT OK - The resistance is less than 5K Ω. The washer switch has failed.
Repair: Replace the switch module.
Proceed to Test Step 6.
3. Check The Signal Circuits In The Harness For An Open
A. The machine harness connectors remain disconnected from