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Lafayette 3608 Engine BKK3500 - Caterpillar

BKK3500 Lafayette 3608 Engine Caterpillar parts G3608 Lafayette
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Caterpillar BKK3500 Lafayette 3608 Engine

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GAS ENGINE  G3608   Caterpillar
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Machine ECM
The following is a list of Diagnostic Trouble Codes (DTCs) that are associated with the system voltage circuit of the machine.
Table 1
Machine ECM (MID 299)
DTC Code Description System Response
168-5 Electrical System Voltage : Current Below Normal Numerous machine system failures can be expected when this code is active. Possible Causes for an FMI 5 diagnostic code are:
A charging system component has failed.
The machine harness is open.
The ECM has failed. A failure of the ECM is unlikely.
Illustration 1 g03862111
Machine ECM electrical system connections
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 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. Check the wiring harness 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 the diagnostic code is active before performing a troubleshooting procedure.Refer to Table 2 for FMI 5 troubleshooting instructions.
Table 2
FMI 5 Troubleshooting
Troubleshooting Test Steps Values Results
1. Check For An Open Circuit
A. Turn key start switch and disconnect switch OFF.
B. Disconnect the wire at alternator terminal labeled “W”.
C. Disconnect the same wire from the Switch Panel (see schematic above).
D. Connect one end of the wire to a know good ground.
E. Measure the resistance of the wire at the open end of the connector.
The resistance is 5 Ω or less. OK - The machine harness appears to work correctly. Either the alternator is not working correctly or the ECM may be recording the diagnostic code incorrectly.
Proceed to Test Step 2.
NOT OK - The resistance measurement is greater than 5K Ω. The wire in the harness between the alternator and the Switch Panel is open or damaged.
Repair: Repair or replace the wiring 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 Test Step 4.
2. Check The Charging System At High Idle
A. Turn key start switch and disconnect

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