| Part Number | 478-7933 (May have suffixes like -01, -02, etc.) |
| OEM Manufacturer | Caterpillar |
| Common Applications | CAT C7, C9, C13 engines; Industrial/Marine equipment; Heavy machinery (excavators, loaders, etc.) |
| Key Functions | - Engine control (fuel injection, timing, RPM)
- Emissions systems (DPF, SCR, EGR)
- Diagnostics & fault code storage (via CAT ET)
- Sensor/actuator management (crankshaft/camshaft position, turbo, injectors) |
| Electrical Specs | - Input Voltage: 12V or 24V DC (machine-dependent)
- Connector Type: 70-pin or 120-pin Deutsch (varies by model)
- Communication Protocol: J1939 CAN bus |
| Physical Characteristics | - Housing: Weather-resistant
- Mounting: Typically engine-mounted or in a protected compartment |
| Common Failure Symptoms | - Engine no-start or misfires
- Reduced power (limp mode)
- Intermittent shutdowns
- Communication errors (CAN bus faults) |
| Diagnostic Tools Required | - CAT ET (Electronic Technician)
- Third-party scanners (e.g., Jaltest, Diesel Laptops) |
| Repair- | - |
| OEM Cross-Reference Part Numbers | - 478-7933-01 (possible variant)
- 478-7933-02 (updated version)
- Other possible related P/Ns: Check CAT SIS for exact matches |
| warranty | -12 months |
