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C4988820 XCMG GR2605 motor grader electronic control module
– Part Number: C4988820 (4988820)
– Description: MODULE, ELECTRONIC CONTROL / ECM (Electronic Control Module)
– Cross Reference: 3918377 (direct replacement, meeting the same specification requirements)
– Type: Embedded electronic control unit, integrating calculation, control, communication and diagnosis functions
– Operating Voltage: 9V～32V DC (wide voltage adaptation, compatible with vehicle start-up, idle and charging conditions)
– Operating Current: Static ≤50mA, Dynamic ≤300mA
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Product Details:
C4988820 XCMG GR2605 motor grader electronic control module
C4988820 (4988820) is a genuine Cummins Electronic Control Module (ECM), known as the “brain” of the engine. It receives signals from various sensors (coolant temperature, oil pressure, speed, etc.), calculates and precisely controls key working conditions such as fuel injection quantity, injection timing, ignition timing, and EGR. It also monitors engine operation, records fault information, triggers protection mechanisms, ensuring engine performance, fuel efficiency and emission compliance. It fits Cummins ISB and other electronic control engine series, widely used in the electronic control system of commercial vehicles, construction machinery and generator sets.
Technical Parameters
– Part Number: C4988820 (4988820)
– Description: MODULE, ELECTRONIC CONTROL / ECM (Electronic Control Module)
– Cross Reference: 3918377 (direct replacement, meeting the same specification requirements)
– Type: Embedded electronic control unit, integrating calculation, control, communication and diagnosis functions
– Operating Voltage: 9V～32V DC (wide voltage adaptation, compatible with vehicle start-up, idle and charging conditions)
– Operating Current: Static ≤50mA, Dynamic ≤300mA
– Processor: 32-bit high-performance microprocessor, operating speed ≥100MHz
– Storage Capacity: Flash ≥128MB, RAM ≥16MB (stores calibration data, fault codes and operating parameters)
– Communication Protocol: CAN 2.0B (supports two-way communication with instrument, diagnostic tool and other electronic control components)
– I/O Interface: 16 analog inputs, 24 digital inputs, 12 PWM outputs, 8 relay outputs
– Temperature Range: -40℃ to +85℃ (adapts to complex temperature changes in the engine compartment)
– Protection Level: IP65 (waterproof, oil-proof, dust-proof, resistant to oil pollution and dust in the engine compartment)
– Weight: Approx. 0.85kg
– Torque: M6 bolt 8±2N·m
– Standards: Cummins OEM, ISO 9001, TS16949, SAE J1939 (commercial vehicle electronic control communication standard)
Application
Applicable Engines
– Dongfeng Cummins: ISB5.9, ISB6.7 Series (focus on electronic control models, meeting National III and above emission standards)
– Other Adaptations: Compatible with Cummins B series electronic control upgraded models, replaceable with 3918377 for corresponding models
– Displacement: 5.9L–6.7L medium-sized diesel engines (for electronic control injection systems only)
Equipment
– Commercial Vehicles: Medium-sized trucks such as Dongfeng Tianjin, Tianlong (equipped with ISB series electronic control engines)
– Construction Machinery: Excavators, loaders, cranes, etc. (adapting to ISB5.9/6.7 models, such as Liugong CLG970E excavators)
– Generator Sets: 100–250kW Cummins ISB series diesel generator sets (electronic control type)
– Industrial Equipment: Air compressors, oilfield machinery, marine auxiliary engines, etc. (equipped with Cummins medium-sized electronic control engines)
Mounting Location
Inside the engine compartment bracket, under the cab instrument panel or inside the frame (away from high-temperature components such as exhaust manifolds and turbochargers, and areas with severe vibration); fixed on a dedicated mounting bracket to ensure firm installation without loosening, regular wiring harness routing, and away from high-voltage lines to prevent signal interference.
Installation & Maintenance
1. Safety: Disconnect the negative battery terminal, turn off all electrical equipment to prevent short circuit from burning the module or electric shock; do not plug or unplug the wiring harness when powered on.
2. Clean: Clean oil, rust and dust on the surface of the mounting bracket to ensure a flat and burr-free mounting surface; clean the oxide layer of the wiring harness connector to ensure good contact.
3. Inspect: No damage or cracks on the appearance of C4988820, no deformation of the interface, no bending or rust of the pins; check that the module model matches the engine model, and confirm the adaptability of the replacement model (3918377).
4. Install: Fix the module on the bracket, evenly tighten the bolts to 8±2N·m to avoid damaging the module case; plug the wiring harness according to the interface, ensure the lock is in place and no loosening.
5. Matching: After installation, connect the diagnostic tool to perform ECU calibration matching, fault code clearing, and synchronize engine parameters (fuel injection quantity, timing, etc.) to ensure adaptation to engine working conditions.
6. Test: Start the engine, observe the operation status, no abnormal vibration or noise; read the data stream through the diagnostic tool to confirm that the sensor signal and actuator action are normal, and no fault alarm.
7. Maintenance: Inspect every 6–12 months/year: no loosening of module fixing bolts, no corrosion of wiring harness connectors, no damage to the case; do not flush the module directly with water to prevent water from entering and damaging the internal circuit; when a fault occurs, first read the fault code with a diagnostic tool, check the sensor and wiring harness, then replace the C4988820 genuine part.
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