TIRE 1654908 - Caterpillar

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)
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. 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.Possible causes for an FMI 3 diagnostic code are:
The energize circuit is shorted to another voltage source.
The switch panel has failed.
The ECM has failed. A failure of the ECM is unlikely.Possible causes for an FMI 6 diagnostic code are:
The energize circuit of the module is shorted to a ground source.
The control module has failed.
The switch panel has failed.
The ECM has failed. A failure of the ECM is unlikely.
Illustration 1 g06026600
Schematic for the Window Wiper Control Module
The preceding diagram is a simplified schematic of the wiper delay circuit connections. The schematic is electrically correct. However, not all the possible harness connectors are shown. Refer to the latest revision of the Electrical Schematic to view the entire circuitry of the machine.Diagnostic Trouble Code Procedure
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 components.
Determine which code is present and use the list below to determine which procedure to follow.
FMI 3 diagnostic code, proceed to Table 2.
FMI 6 diagnostic code, proceed to Table 3.
Table 2
FMI 3 Troubleshooting
Troubleshooting Test Steps Values Results
1. Check The Machine Harness For A Short
A. Turn the key start switch and the disconnect switch OFF.
B. Disconnect all harness connectors from the switch panel.
C. Disconnect the wiper control module from the machine harness.
D. At the switch panel, identify the wiper intermittent pin locations (refer to the schematic above).
E. 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. OK - All measurements are greater than 5K Ω.
Proceed to Test Step 2.
NOT OK - Resistance is less than 5 Ω. A