(1) Possible Causes
1) Proper Operation
CAT Comm Adapter3 478-0235 Diagnostics for Caterpillar
2) Fuel Supply
3) Coolant Temperature Circuit
4) Hydraulically Electronically Controlled Individual Injectors
5) Combustion Malfunction
6) Intake Heater
7) Air Intake Resistance
(2) Recommended Measures
1) Proper Operation. Know the standard operating conditions. Cold external temperatures can affect white smoke production.
12.2021 Caterpillar ECM ECU Flash Files Full Set Download
2) Fuel Supply
① When cranking the engine, monitor the exhaust for smoke. If there is no smoke, there may be a problem with fuel quality or fuel supply.
② Check fuel quality. ③ Check fuel pressure. ④ Ensure the fuel system is filled.
Check for blockages in the fuel supply line.
6. Check the fuel filter.
① If the temperature is below 0°C, check for solidified fuel (waxy substance).
8. Check for air in the fuel system.
3) Coolant Temperature Circuit.
① Connect the ET to the Cab Data Automatic Transmitter connector.
② Check for diagnostic codes related to the coolant temperature circuit.
③ Monitor the coolant temperature sensor status on the Caterpillar Electronic Technology (CatET) status screen. If a self-diagnostic code indicating an open or short circuit is detected, refer to the "Testing for Open or Short Circuits in Engine Temperature Sensors" section.
4) Hydraulic Electronic Control Unit Injector.
① Ensure the hydraulic electronic control unit injector connector (J300/P300) is fully connected and free from corrosion.
② Ensure the ECM engine wiring harness connector (J2/P2) is fully connected and free from corrosion.
③ Connect the ET to the Cab Data Automatic Transmitter connector. Use the cylinder shutdown test. View the cylinder shutdown test by selecting the "Diagnostic Menu" and "Diagnostic Method Menu". Perform the cylinder shutdown test to disable each cylinder. Cylinder failure allows the technician to isolate the non-igniting cylinder. If it is necessary to isolate a non-igniting cylinder into a specific cylinder, please refer to the "Testing the Injector Solenoid Valve Circuit" section.
5) Combustion malfunction. Check for combustion malfunctions, such as excessively cold external temperatures or mechanical failures.
6) Intake air heater.
Caterpillar ET 2026A & 2019C Electronic Technician Diagnostic Software Download and Installation
(1) Possible Causes
1) Intake and Exhaust Systems
2) Engine Speed/Timing
3) Air Pressure Sensor
12.2021 Caterpillar ECM ECU Flash Files Full Set Download
4) Turbocharger Outlet Pressure Sensor, Fuel Configuration and/or “FRC Fuel Limits”
5) Personalization Module
6) Fuel Quality
7) Valve Adjustment
(2) Recommended Measures
1) Intake and Exhaust Systems
① Check the air intake system for throttling or leaks.
a. Connect the Caterpillar Electronic Technology (CatET) to the service tool connector.
b. Compare the readings on the air pressure sensor and the turbocharger compressor inlet pressure sensor.
c. Check the filter for throttling.
Caterpillar ET 2026A & 2019C Electronic Technician Diagnostic Software Download and Installation
d. Check for unloaded operation or alarms.
e. Visually inspect the system for throttling and/or leaks.
② Confirm that the turbocharger is not faulty.
③ Check the exhaust system for throttling.
④ Repair any leaks found. Remove any throttling devices found. Replace any damaged parts.
2) Engine Speed/Timing.
① Check the calibration of the engine speed/timing sensor. See the "Engine Speed/Timing Sensor Calibration" section.
② Verify the alignment between the crankshaft and camshaft drive gears.
3) Barrel Pressure Sensor. Check the barrel pressure sensor for dirt and/or debris. Remove any dirt and/or debris. The barrel pressure sensor should be between 50 and 100 kPa.
4) Turbocharger Outlet Pressure Sensor, Fuel Configuration and/or "FRC Fuel Limit Values".
CAT Comm Adapter3 478-0235 Diagnostics for Caterpillar
(1) Possible Causes.
1) Engine Operation.
2) Fuel Leakage.
3) Fuel Quality.
4) Engine Speed/Timing.
5) Individual Injectors.
6) Intake and Exhaust Systems.
7) Auxiliary Equipment.
(2) Recommended Actions.
1) Engine Operation. To obtain the following data, use Caterpillar Electronic Technology (CatET) to check idling time, poor operating habits, and high load factors. Note: Environmental conditions (such as wind and snow) can affect engine operation.
12.2021 Caterpillar ECM ECU Flash Files Full Set Download
2) Fuel Leakage. Check the fuel system for leaks. Repair or replace any leaking fuel lines or components.
3) Fuel Quality. Check the fuel quality. Remove unsatisfactory fuel from the fuel tank. Install a new fuel filter. Fill the fuel tank with high-quality, clean fuel.
4) Engine Speed/Timing. 5) Individual Injectors.
① Check that ECM connectors J1/P1 and J2/P2, as well as the individual injector connectors, are installed correctly.
② Perform an injector solenoid coil test on a CatET to determine if all injector solenoid coils are powered by the ECM. Perform a cylinder shut-off test using the ET to identify injectors that can be de-ignited. For the correct procedure, see the "Testing Injector Solenoid Circuits" section.
6) Intake and Exhaust Systems.
① Check the air filter for throttling. Clean or replace any clogged air filters.
② Check the intake and exhaust systems for throttling and/or leaks.
Caterpillar ET 2026A & 2019C Electronic Technician Diagnostic Software Download and Installation
(1) Possible Causes 1) Oil Leakage
CAT Comm Adapter3 478-0235 Diagnostics for Caterpillar
2) Oil Level
3) Engine Oil Temperature
4) Turbocharger
5) Valve Guides
6) Piston Rings
(2) Recommended Measures
1) Oil Leakage. Locate all oil leaks. Repair the leaks. Check the crankcase vent for excessive dirt.
2) Oil Level. Remove excess oil. Identify the source of the excess fluid. Repair the leak causing the malfunction. Recheck all fluid levels.
Caterpillar ET 2026A & 2019C Electronic Technician Diagnostic Software Download and Installation
3) Engine Oil Temperature. Check the engine oil temperature for proper conditions.
4) Turbocharger. Check the intake manifold for oil. Repair or replace the turbocharger if necessary.
5) Valve Guides. Replace the cylinder head if the valve guides are worn.
6) Piston Rings. Inspect internal engine components. Replace any worn parts.
(1) Possible causes:
CAT Comm Adapter3 478-0235 Diagnostics for Caterpillar
1) Battery.
2) Battery cable.
3) Starting circuit.
4) Starter solenoid.
5) Starter motor.
6) Flywheel ring gear.
7) Transmission.
8) Engine auxiliary equipment.
9) Hydraulic cylinder lock.
10) Internal engine problems.
(2) Recommended measures:
1) Battery and/or battery cable.
① Check the main power switch, battery terminals, and battery cable for loose connections and corrosion. If corrosion is found, remove and clean the battery cable. Tighten any loose connections.
Caterpillar ET 2026A & 2019C Electronic Technician Diagnostic Software Download and Installation
② Check the battery. Charge the battery. Test the battery load.
2) Starter solenoid or starting circuit.
① Check the operation of the starter solenoid.
② Check the machine wiring connected to the starter solenoid. 3) Starter Motor.
① Check the starter motor operation.
② Check the starter pinion and flywheel ring gear for damage.
4) Transmission or Engine Auxiliary Equipment.
① Ensure the free play in the transmission system.
② Ensure the timing pin is not left in the flywheel housing.
③ Remove and inspect any engine auxiliary equipment that could lock the engine. Engine auxiliary equipment that could lock the engine includes the hydraulic oil pump driven by the rear gear set, air compressor, power steering pump, and engine oil pump.
5) Hydraulic Cylinder Lockers. Check the fluid in the cylinders by removing each individual injector (hydraulic cylinder lockers). Note: Drain the fuel from the cylinder head. When removing individual injectors, fuel will flow from the cylinder head into the cylinder.
6) Internal Engine Problems.
① Disassemble the engine (refer to the disassembly/reassembly section).
② Inspect internal components for jammed, broken, or bent parts.
SMCS - 1261-010-PY; 1263-010 S/N - DFM1-UP S/N - DNP1-UP S/N - EAL1-UP S/N - EKT1-UP S/N - ESG1-UP S/N - FKK1-UP S/N - GBA1-UP S/N ...
