4787926 478-7926 ECU ECM Controller Electronic Control Module Programmed for Caterpillar 773F 777C 777D 777B 777E 777F 776C 775F Trucks SR5 SR4B D11T D10N D10R D10T Tractor
20R-5038 ，20R8825 ，20R8220，20R-6471，20R8192，10R-5645，20R8190 ，348-2390，172-9387，3709478，569-8638，285-1133，512-5720 20r-2320, 592-5153, 20R-1766, 20R1834, 20R-6112, 20R-3745, 20R-8183, 20R-6911, 20R-8188, 20R-5037,20R-8876, 20R-8877, 10R-4088, 348-2387
10R-4087,20R-6537,10R-5895, 20R-4092,
20R-8186, 10R-9540 ,20R-4091, 11R-1267,
11R-0333,11R-0332,348-2387 10R-8105 11R-0331 543-1326 284-8906, 348-2378, 172-9391,252-4501 , 607-2612，494-6473，488-4886，620-0991，20R-5147 ，20R-3749，211-5544，192-1590，10R-9537，10R-5641，20R-5039，20R-2320，20R-8457，20R-8456，20R-8604，10R-8104，20R-4408 ，20R-8443，470-8027
10R5644，304-5687，10R-5613 20R-4709 ， 20R-4706 ，20R-3740
20R-8608 20R-9456,20R-4091,10R-9540,
10R-8111,11R-1274 ,582-6895, 386-1377, 391-7036,190-6470,
307-7541,596-2732,166-6928,592-5153,592-5150, 11R-1270 ，10R-8148，30R-0057，20R-1833，10R-9402，11R-1568，20R-7218，
20R-8179，20R-6912，
The replacement of the original ECM must strictly follow the Caterpillar repair specifications,
otherwise it may damage the engine:
1. Backup the original ECM parameters
-Using Cat ® ET (Electronic Technician) prints configuration parameters
and records the injector serial number and calibration code (must be reprogrammed
after replacing the injector or ECM).
2. Copy the configuration to the new ECM
-Select 'Copy Configuration/ECM Replacement' → 'Load from ECM' → 'Program ECM' through ET. If it fails,
manual input of parameters is required (some parameters need to be obtained from the factory).
3. Precautions for Hardware Replacement
-Disconnect the power supply and J1/P1, J2/P2 connectors;
-Ensure that the grounding strap is securely installed to avoid poor
contact caused by vibration;
-The fuel pipeline needs to reserve buffer space to prevent pulling the ECM.
4. Software and Calibration
-Install the latest flash file (version errors can cause engine damage);
-Calibrate the fuel injection timing and check for diagnostic codes (such as CID 0600 hydraulic oil
temperature sensor abnormality).
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4、 Usage and maintenance suggestions
1. Regular diagnosis
-Using Cat ® ET or Messenger reads the fault code (such as CID 0246 CAN
bus abnormality for MID 082) and promptly cleans the sensor dirt.
2. Environmental and oil requirements
-Use clean diesel with a filtration accuracy of ≤ 5 μ m to prevent clogging of precision components;
-The working temperature should be ≤ 26 ℃ to avoid ECM component aging caused by high temperature.
3. Preventive maintenance
-Calibrate rail pressure sensors and flow meters every six months;
-Check the waterproof sealing of the wiring harness, especially in high humidity environments
such as mines and ships.
4. Fault response
-Symptoms of ECM failure: sudden power drop, shaking and stalling, black smoke emission.
-Emergency plan: Immediately shut down the machine, check the power supply and grounding;
