773E, 773F, 775F, 777E, and 777F Off-Highway Truck Chassis Electronic Control System Caterpillar

Event Code List

Usage:

773E DJS

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Table 1
Event Codes for the Chassis ECM (MID 87)
Code (Level) Description	Specifications	Probable Cause/ Recommended Action
E47 (2) Transmission Abuse Warning	Trip Point: Shift lever moved from neutral to forward or neutral to reverse or from forward to reverse or from reverse to forward with engine speed greater than or equal to 1500 RPM and/or ground speed greater than 4.8 km/h (3 mph) per hour Reset Point: Engine Speed less than 1500 RPM	Reduce engine speed below 1500 RPM when shifting into a gear.
E49 (2) Coasting In Neutral Warning	Trip Point: Ground speed is greater than or equal to 19.3 km (12 mi) per hour while in transmission is in neutral System Response: Engine Automatically elevated idle to 1300 RPM Reset Point: Ground Speed is less than 16.1 km/h (10 mph)	(Transmission Abuse) While the machine is coasting in neutral, planet gear speeds are high. The high gear speeds increase the likelihood of damage to the transmission.
E119 (2) Low Fuel Level	Trip Point: Fuel level is less than or equal to 8% with the key switched ON Reset Point: Fuel is greater than 8% or the key switch is OFF	Refuel now
E155 (2) High Torque Converter Temperature	Trip Point: Torque converter temperature is greater than or equal to 124° C (255.2° F) with the engine running Reset Point: Torque converter temperature is less than 115° C (239° F) or the engine is shut off	Change truck operation to allow TCO to cool. If needed, shift to neutral and run engine at high idle until TCO temp event clears. Ensure that the transmission oil dipstick level reads correct. If E155 events are logged frequently, further investigation is required. Refer to Testing and Adjusting, RENR8303, "Relief Valve (Torque Converter Inlet) Pressure - Test and Adjust" if the TCO pressure is correct, and the E155 is active.
E179 (1) Alternator Not Charging	Trip Point: Alternator is not charging with the key switched ON and the engine running Reset Point: Alternator is charging off or the key switch is toggled.	Refer to Special Instruction, REHS0354, "Charging System Troubleshooting" Refer to Troubleshooting, "MID 087 - CID 0168 FMI - 04"
E284 (2S) Low Brake Accumulator Pressure	Trip Point: Service brake accumulator pressure is less than or equal to 8619 kPa (1250 psi) • The starter status is not cranking. • The shift lever position is not in park. • The service brake accumulator pressure is KNOWN • The machine shutdown status is not intentional shutdown. • The key switch is in the ON position. System Response: ARC service test disabled Reset Point: service brake accumulator pressure is greater than 8619 kPa (1250 psi), the shift lever position is in park, the service brake accumulator pressure is not known, or the key switch is OFF	Do not move machine Refer to Testing and Adjusting, RENR8315, "Brake Accumulator - Test and Charge" Note: Snooze mode is available on the monitor. Snooze mode disables the audible alarm for an active E284 (2S) - when towing the truck with a dead engine and with the shift lever out of park.
E284 (3) Low Brake Accumulator Pressure	Trip Point: The service brake accumulator pressure is less than or equal to 8619 kPa (1250 psi) and: • The starter status is not cranking. • The service brake accumulator pressure is KNOWN. • The machine speed is greater than or equal to 8 km/h (5 mph). • The machine shutdown status is NOT INTENTIONAL SHUTDOWN. • The key switch is in the ON position. System Response: ARC service test disabled Reset Point: The service brake accumulator pressure is greater than 8619 kPa (1250 psi) or: the service brake accumulator pressure is not known, machine speed is less than 8 km/h (5 mph), or the key switch is OFF	Immediate Safe Shut Down Required Refer to Testing and Adjusting, RENR8315, "Brake Accumulator - Test and Charge"
E289 (2) Low System Air Pressure	Trip Point: The Electronic control Module (ECM) detects a problem with the engine's air inlet. System Response: During the first 60 seconds the engine is operating with a low air pressure condition, event E289 will be actively displayed and not logged. When the low air pressure conditions exist for longer than 60 seconds after engine start, the event is actively displayed and logged. Reset Point: Various inspections must be completed to check for damage, plugged filters, or faulty sensors. After checks are completed, the machine will need to be restarted to determine if the code is active and displayed.	Shut down the machine and complete the following actions: • Check recommendations for high altitude operations. • Check condition of engine air filters. • Check intake manifold air temperature sensor and associated circuit. • Check for reduced ambient air and flow of intake air through the air charge cooler. (Check air filter element. Clean or replace the filter element) • Check that the engine ha been installed in an enclosure that is sufficiently ventilated. (Repair the ventilation for the enclosure.
E330 (3) Transmission Output Speed Mismatch	Trip Point: Actual gear second or higher with lockup clutch engaged System Response: Disengage lockup clutch, shifting disabled, does not activate transmission fail-safe (ABC) logic	Immediate Safe Shut Down Required Correct any active diagnostic codes related to the torque converter output speed sensors.
E334 (2) Low Auto Lube Pressure	Trip Point: Auto Lube Pressure is less than or equal to 15858 kPa (2300 psi), the auto lube duration timer expires, the auto lube pressure sensor diagnostic status is not active, and the auto lube installation status is installed Reset Point: Auto lube pressure is greater than 15858 kPa (2300 psi)	Check for sufficient grease in the auto lube system. Check lube system for leaks, kinked or plugged lines, fuse or pump failures Refer to Testing and Adjusting, RENR8396, "Automatic Lubrication System Troubleshooting"
E362 (2) Engine Overspeed	Trip Point: Engine is greater than 2500 RPM for 0.5 seconds. Reset Point: Engine speed is less than 2400 RPM System Response: The ECM will derate the engine (reduce fuel injection until engine speed is at the reset point). The tachometer indicator will illuminate on the cab display.	Determine the cause of the overspeed. Use Cat ET to view engine overspeed histograms to determine the operating / sensor information during the event. Make corrections to prevent the overspeed from recurring. Ensure that intake of combustible atmosphere / gas into the engine, is not the cause of the overspeed event.
E521 (2) Autolube Pressure Not Decreasing After Cycle	Trip Point: Activates when the automatic lubrication pressure is greater than or equal to 7584 kPa (1100 psi) after the automatic lubrication has stopped. Reset Point: Deactivates when the automatic lubrication pressure is less than or equal to 7584 kPa (1100 psi)	Check and repair the system. Refer to Testing and Adjusting, RENR8396, "Automatic Lubrication System Troubleshooting"
E530 (1) Engine Oil Evacuation Occurred	Trip Point: Engine oil evacuation activation switch status is ON, starter lockout is active, and engine oil evacuation hose is detected System Response: Machine remains in crank lockout until hose is removed Reset Point: Engine oil evacuation activation switch status is ON, starter lockout is not active, or start lockout switch and key switch are OFF	Check engine oil and the equipped "QuickEvac", Fast Fill or High-Speed system . Refer to Operation and Maintenance Manual, "Engine Oil and Filter - Change"
E531 (2) Low Transmission Oil Level	Trip Point: Transmission oil level is LOW with the engine RUNNING. Reset Point: When the enable conditions are not met	Check transmission oil level and ensure that the oil reservoir is filled before the startup of the truck. Refer toOperation and Maintenance Manual, "Transmission Tank Oil Level - Check".
E542 (3) Low Steering Pump Pressure	Trip Point: Steering pump pressure drops below 700 kPa (101.5 psi) with the secondary steering armed status is ARMED System Response: Run secondary steering pump Reset Point: Steering pump pressure switch status is OK or machine is intentionally shut down	Immediate Safe Shut Down Required Refer to Testing and Adjusting, RENR8313, "Piston Pump (Steering) Pressure - Test and Adjust" and Testing and Adjusting, RENR8313, "Steering System Troubleshooting"
E617 (2) Machine Lockout Active	Trip Point: Transmission lockout status is LOCKED OUT System Response: Hoist system locked out, transmission system locked out, brake system locked out, dash lockout indicator ON, machine lockout lamp ON, and steering disables Reset Point: Transmission lockout status is NOT LOCKED OUT	Block Wheels
E620 (2) Starter Lockout Active	Trip Point: Stater lockout status is LOCKED OUT System Response: Starter locked out Hoist system locked out Transmission system locked out Brake system locked out Dash lockout indicator ON, machine lockout lamp ON, Steering disabled Reset Point: Starter lockout status is NOT LOCKED OUT	Block Wheels
E621 (2) Body Up	Trip Point: Ground speed is greater than or equal to 5 km/h (3.1 mp/h) or higher with the body up System Response: Light "body up" indicator Reset Point: Ground speed is less than 5 km/h (3.1 mph)	Lower body
E627 (2) Parking Brake Applied With Machine In Motion	Trip Point: Secondary brake pedal position is less than 50%, shift level position is NOT IN PARK, machine speed is MOVING, and engine speed is RUNNING Reset Point: Secondary brake position is greater than or equal to 50%, shift lever position is PARK, or engine speed is NOT RUNNING	Deactivate the parking brake Parking brake service may be required For troubleshooting, refer to Testing and Adjusting, SENR2986, "Parking Brake Release Pressure - Test"
E663 (2) Body Up While Machine In Motion	Trip Point: Ground speed is greater than or equal to 13 km/h (8 mph) or higher with the body up System Response: Light body up indicator Reset Point: ground speed is less than 13 km/h (8 mph) or the body is down	Slow the truck and lower the body of the machine.
E667 (2) Machine Overspeed	Trip Point: Ground speed is greater than 79.3 km/h (49.3 mph) per hour on a 773F and 775F and, 86.6 km/h (53.8 mph) per hour on a 777F System Response: ARC system limits speed to protect points if machine is in gear Reset Point: Ground speed is less than 73.5 km/h (45.7 mph) per hour on a 773F and 775F, and 82.6 km/h (51.3 mph) per hour on a 777F	Slow the truck.
E765 (2) Transmission Charge Filter Plugged	Trip Point: Transmission oil is bypassing the filter with torque converter oil is above 51° C (123.8° F) Reset Point: Transmission oil is not bypassing the filter or when torque converter oil is below 43° C (109.4° F)	Check transmission filter immediately If transmission filter is plugged. refer toOperation and Maintenance Manual, "Oil Filter (Transmission) - Replace"
E767 (1) Lockup Clutch Filter Plugged	Trip Point: Lockup clutch filter bypass status is BYPASSING and the torque converter oil temperature is greater than 51° C (123.8° F) Reset Point: Lockup clutch filter bypass status is NOT BYPASSING or the torque converter oil temperature is less than 43° C (109.4° F)	Change filter Refer to Operation and Maintenance Manual, "Oil Filter (Torque Converter) - Replace - Lockup Clutch Valve"
E768 (2) Engine Shutdown Due to Loss of Machine Lockout	Trip Point: Primary steering pressure is OK and machine lockout status is ACTIVE System Response: Chassis sends a message to shut down the engine Reset Point: Primary steering pressure is LOW or when enable conditions are not met	Service required
E875 (1) Low System Voltage	Trip Point: System voltage is less than or equal to 24. 8 V with the secondary steering relay energized and the engine speed greater than 1500 RPM or unknown Reset Point: System voltage is greater than 26 V or when any enable condition is not met	There is a developing problem with the charging system.
E875 (2) Low System Voltage	Trip Point: Engine running. System voltage is less than or equal to 24 V with the starter status NOT CRANKING, secondary steering relay is not energized. Refer to Troubleshooting, "MID 87 - CID 0168 - FMI 04" Reset Point: System voltage is greater than 24.5 V or when any enable condition is not met	To troubleshoot the charging system, refer to Special Instruction, REHS0354, "Charging System Troubleshooting"
E875 (3) Low System Voltage	Trip Point: System voltage is less than or equal to 23 V with the engine not running Reset Point: System voltage is greater than 23.5 V or when any enable condition is not met	Immediate Safe Shut Down Required To troubleshoot the charging system, refer to Special Instruction, REHS0354, "Charging System Troubleshooting"
E876 (1) High System Voltage	Trip Point: System voltage is greater than or equal to 29.5 V with the engine running Reset Point: System voltage is less than 29 V or when enable conditions are not met	There is a developing problem with the charging system.
E876 (3) High System Voltage	Trip Point: System voltage is greater than or equal to 32 V with engine running Reset Point: System voltage is less than 31.5 V or when enable conditions are not met	To troubleshoot the charging system, refer to Special Instruction, REHS0354, "Charging System Troubleshooting"
E1003 (2) High Brake Oil Temperature	Trip Point: Brake oil temperature is greater than or equal to 124° C (255.2° F) Reset Point: Brake oil temperature is less than 113° C (235.4° F) or when enable conditions are not met	Refer to Testing and Adjusting, RENR8315, "Brake Oil Overheating Troubleshooting"
E1003 (3) High Brake Oil Temperature	Trip Point: High right rear brake oil temperature is greater than or equal to 124° C (255.2° F) Reset Point: High right rear brake oil temperature is less than 113° C (235.4° F) or when enable conditions are not met	Immediate Safe Shut Down Required Refer to Testing and Adjusting, RENR8315, "Brake Oil Overheating Troubleshooting"
E1004 (1) Brake Oil Filter Plugged	Trip Point: Brake oil filter bypass status is BYPASSING with the brake oil temperature greater than 52° C (125.6° F) Reset Point: Brake oil filter bypass status is NOT BYPASSING or brake oil temperature is less than 44° C (111.2° F)	Check Immediately Replace filter if plugged. refer to Disassembly and Assembly, RENR8273, "Oil Filter (Parking, Service Brake - remove and install)"
E2143 (2) Low Engine Coolant Level	Trip Point: Engine coolant level is sensed LOW with the engine running Reset Point: When the enable conditions are not met.	Ensure that the coolant is maintained to the proper level. Refer to Operation and Maintenance Manual, "Cooling System Coolant Level - Check". If level is low, inspect the cooling system for leaks.
E2143 (3) Low Engine Coolant Level	Trip Point: Engine coolant level is sensed LOW with the engine running Reset Point: When the enable conditions are not met	Immediate Safe Shut Down Required Ensure that the coolant is maintained to the proper level. Refer to Operation and Maintenance Manual, "Cooling System Coolant Level - Check" If the coolant level is correct, check the sensor circuit. If the coolant level sensor is faulty, refer to Special Instruction, REHS5531, "Installation Procedure for Coolant Level Sensor Retrofit for Non-VIMS 777F Machines {7422}" and Service Magazine, SEPD0949, "Coolant Level Sensor Installation Service Notes {5574}".

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Table 2
WARNING OPERATION
Warning Level	Action Alarm	Action Indicator	Advisor Display Pop Up Message
Level 1	OFF	OFF	ON
Level 2	OFF	Flash ON and OFF	ON
Level 3	Pulse ON and OFF	Flash ON and OFF	ON

Recommended actions to be taken by the machine operator in response to the different warning levels.

Level 1 - This warning level will cause the involved alert indicator to illuminate. A level 1 warning will indicate that the operator should be aware of a condition of one or more of the machine systems.

Level 2 - This warning level will indicate that the operation of the machine should be changed or maintenance should be performed to the machine. Possible damage to components on the machine may occur.

Level 3 - This warning level will indicate that the machine needs to have an immediate, safe emergency engine shutdown. Possible injury to the operator or severe damage to components may occur.

If an action alarm, alert indicator, or warning occurs, a pop-up message will override any screen on the Advisor display module.