parts catalog

Lafayette 3612 Engine BBR4600 - Caterpillar

BBR4600 Lafayette 3612 Engine Caterpillar parts G3612 Lafayette
Alternative (cross code) number:
Caterpillar BBR4600 Lafayette 3612 Engine

Buy Lafayette 3612 Engine BBR4600 Caterpillar genuine, new aftermarket tractor parts with delivery

Compatible equipment models: BBR4600:

GAS ENGINE  G3612   Caterpillar
  For full view, you need register


Machine ECM
The following is a list of Diagnostic Trouble Codes (DTCs) that are associated with the switch circuits of the machine.
Table 1
Machine ECM (MID 39)
DTC Code Description System Response
1834-2 Ignition Key Switch: Data erratic, intermittent, or incorrect The Machine ECM will log the diagnostic code and the warning light on the control panel will flash while this diagnostic code is active. The Transmission ECM will stop energizing the injector solenoids and the engine will shut down. Possible causes for an FMI 2 diagnostic code are:
A short circuit exists.
An open circuit exists.
The switch has failed.
The ECM has failed. A failure of the ECM is unlikely.
Illustration 1 g03743892
Schematic of the Switch Circuit
Note: The diagram above is a simplified schematic of the connections for the switch circuits. The schematic is electrically correct. However, not all of the possible harness connectors are shown. Refer to the latest revision of the electrical schematic for the specific machine being serviced for the complete schematic.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 The Switch Circuit
Code present. FMI 2 diagnostic code, proceed to Test Step 2.
Begin Process For FMI 2 Troubleshooting HERE
2. Check The Switch
A. Turn the disconnect switch and the key start switch OFF.
B. Disconnect the switch from the machine harness.
C. Measure the resistance between the return or ground pin and all input pins, one at a time.
D. Move the switch through the range of selections, and verify continuity.
The resistance should be less than 5 Ω when switch operation indicates continuity, and greater than 5K Ω when switch operation indicates no continuity. OK - The resistance is as expected.
Proceed to Test Step 3.
NOT OK - The resistance is not as expected.
Repair: Replace the switch. Verify that the new switch resolves the diagnostic code.
Note: A resistance that

Caterpillar SIS machinery equipment:

Caterpillar SIS

Parts lafayette Caterpillar catalog:

Back to top
The names Cat, Caterpillar, John Deere, Komatsu, Volvo, Hitachi, Doosan, JCB, Hyundai or any other original equipment manufacturers are registered trademarks of the respective original equipment manufacturers. All names, descriptions, numbers and symbols are used for reference purposes only.
AVSpare.com is in no way associated with any of the manufacturers we have listed. All manufacturer's names and descriptions are for reference only. Cat® and Caterpillar® are registered trademarks of Caterpillar, Inc.