| Diagnostic Codes Table | ||
|---|---|---|
| Code and Description | Conditions which Generate this Code | System Response |
| 5418-2 Engine Fuel Actuator #1 : Erratic, Intermittent, or Incorrect | The fuel actuator has reported that a power cycle has been completed and at least one calibration attempt has failed. | The code is logged. The amber warning lamp is activated. |
| 5418-7 Engine Fuel Actuator #1 : Not Responding Properly | There is a mismatch between the fuel position requested by the command signal and the actual position of the fuel valve. The problem is reported by the fuel actuator. | |
| 5418-12 Engine Fuel Actuator #1 : Failure | The fuel actuator has reported an internal failure. | |
| 5418-13 Engine Fuel Actuator #1 : Calibration Required | The fuel actuator has reported that a calibration attempt has failed. The actuator cannot find the end stop for the valve. | |
The fuel actuator is an electronic actuator. The actuator works with the Electronic Control Module (ECM) to ensure the correct fuel position during all engine operating conditions.
The ECM modulates the fuel valve from a fully closed position to a fully opened position.
Communications
The ECM and the fuel actuator communicate via the CAN data link. The ECM sends a command signal to the actuator. The actuator sends the following information to the ECM: desired actuator position, actual actuator position and internal fault diagnosis.
If the ECM cannot communicate with the actuator, the ECM activates a 51-9 diagnostic code. The problem may be with the power supply to the actuator. This code may be generated for an intermittent problem. After checking the power circuit for the actuator, refer to Troubleshooting, "CAN Data Link - Test" for information that is related to troubleshooting the data link circuitry.
Self-diagnostic Function
If an internal fault is detected by the actuator, the condition is communicated via the CAN data link. The ECM activates a 5418-12 diagnostic code. The most likely cause of a 5418-12 diagnostic code is an electrical problem or a mechanical problem.
Calibration Failure Message
A calibration is initiated when the power to the actuator is cycled. The power must be removed from the engine in order to power down the actuator.
If a calibration attempt fails at any time, the ECM activates a 5418-2 diagnostic code. If an attempt to calibrate the actuator fails, the actuator will attempt the calibration several times. The 5418-2 code will remain active during this time. If the actuator determines that a calibration is not possible, the 5418-2 code will be deactivated and the ECM will generate a 5418-13 diagnostic code.
If the actuator forces a calibration attempt and the engine is running, a 5418-2 code will be generated. The code will remain active until the engine is shut down and the code will become logged. The ECM will then try another calibration attempt. If the attempt fails, the ECM will generate a 5418-13 diagnostic code.
The engine must be running in order for this code to be generated. The most likely cause of a 5418-2 code is an intermittent electrical problem in the circuit for the actuator power supply. The most likely cause of repeated unsuccessful calibrations is a dirty valve assembly or a malfunctioning valve assembly.
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| Illustration 1 | g02025400 |
Schematic for the circuit of the fuel actuator | |
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| Illustration 2 | g01914692 |
Location of the connector at the fuel actuator (right rear engine view) (1) Fuel actuator | |
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| Illustration 3 | g02024491 |
Locations of the connectors at the ECM panel that are for the fuel actuator (right side engine view) (2) J1/P1 ECM connectors (3) Connector for the power distribution panel | |
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| Illustration 4 | g02024492 |
Locations of the breaker at the power distribution panel that is for the fuel actuator (right side engine view) (4) Circuit breaker for the ECM (15 amp) | |
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| Illustration 5 | g02025414 |
Locations of the connections at the harness connector for the fuel actuator (Terminal 1) +Battery (Terminal 2) Harness code (No. 4) (Terminal 5) −Battery (Terminal 7) Harness code (No. 1) (Terminal 8) +Battery (Terminal 9) Harness code (No. 5) (Terminal 12) Harness code (No. 3) | |
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| Illustration 6 | g02024512 |
Locations of the connections at the ECM connector for the fuel actuator (Terminal 1) −Battery (Terminal 2) −Battery (Terminal 3) −Battery (Terminal 7) +Battery (Terminal 8) +Battery (Terminal 9) −Battery (Terminal 10) −Battery (Terminal 15) +Battery (Terminal 16) +Battery | |
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| Illustration 7 | g02024526 |
Terminal locations at the connector for the breaker panel that are for the electrical power supply (Terminal A) +Battery (Terminal B) +Battery (Terminal C) +Battery (Terminal F) -Battery (Terminal G) -Battery (Terminal H) -Battery (Terminal J) -Battery | |
| Troubleshooting Test Steps | Values | Results |
1. Check for Diagnostic Trouble Codes A. Connect to Cat® Electronic Technician (Cat® ET). B. Turn the keyswitch to the ON position. C. Access the "Active Diagnostic Code" screen on Cat ET. Wait at least 30 seconds in order for the diagnostic codes to become active. D. Look for these active codes or logged codes: 1. -3 2. -4 |
Codes |
Result: No diagnostic codes are active for the fuel actuator. Repair: There may be an intermittent problem in the harness or in a connector. If an intermittent problem is suspected, refer to Troubleshooting, "Electrical Connectors - Inspect". Result: A 5418-7 diagnostic code is active. Proceed to Test Step 3. Result: A 5418-12 diagnostic code is logged. Proceed to Test Step 2. Result: 5418-12 diagnostic code is active. Repair: Replace the fuel actuator. Verify that the repair eliminates the problem. |
2. Inspect the Electrical Connectors and the Wiring A. Turn the main disconnect switch to the OFF position. B. Thoroughly inspect the ECM connectors. Inspect all of the connectors that are associated with the circuit. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details. C. Perform a 45 N (10 lb) pull test on each of the wires in the ECM connectors that are associated with the circuit. D. Check the allen head screw for each of the ECM connectors for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details. E. Check the harness and wiring for abrasion and for pinch points from the actuator back to the ECM. |
Connectors |
Results: The harness and connectors appear to be OK. Proceed to Test Step 3. Results: The harness and connectors are Not OK. Repair: Repair the connectors or wiring and/or replace the connectors or wiring. Ensure that all of the seals are properly in place and ensure that the connectors are coupled. Verify that the repair eliminates the problem. |
3. Check the Ambient Temperature A. Connect Caterpillar Electronic Technician (ET) to the service tool connector. B. Restore electrical power to the ECM. C. Monitor Cat ET for the temperature reading. |
−40° C (−40° F) |
Result: The temperature is OK. Repair: Cycle the power on to the engine. Place the engine control switch in the stop position and allow sufficient time for the actuator to calibrate. If one of the codes become active during the calibration attempt, Proceed to Step 4. Result: The temperature is Not OK. Repair: Take the appropriate measures to increase the ambient temperature around the engine. Verify that the repair eliminates the problem. |
| 4. Check the Valve Mechanism for the Fuel Actuator A. Remove the valve mechanism from the engine. B. Check for dirt, debris, and blockage in the piping for the fuel system. |
Debris |
Result: The valve mechanism for the Fuel Actuator is OK. Result: The valve mechanism for the Fuel Actuator is Not OK. Repair: Perform any necessary repairs. Verify that the repair eliminates the problem. |