Denso 4D56 Manuals

Denso 4D56 Service manual (52 pages)

• Identifier: id-655397
• Brand: Denso
• Device: Denso 4D56 Engine
• Type: Service manual, PDF
• Key Aspects: Troubleshooting Information, Common Issues and Solutions
• UPD Date: 14.04.2026
• Source File: 651397.pdf
• Pages: 52
• Description: General instruction manual for the Denso 4D56. It explains configuration options and usage recommendations, system configuration, error handling, product specifications.

Key Pages and Contents:

• (3) Operational Outline

  • Learning control sends ISC (target speed correction quantity) and FCCB (cylinder-to-cylinder correction quantity) feedback based on engine speed to apply injection control. The correction quantity is added to each cylinder based on ISC and FCCB co …

• (1) SCV Opening Small (Duty ON time long - Refer to the "Relationship Between Actuation

  Signal and Current" Diagram.) • When the opening of the SCV is small, the fuel suction area is kept small, which decreases the transferable fuel volume. (2) SCV Opening Large (Duty ON t …

• (1) Atmospheric Pressure Measurement Conditions

  • The VSV turns ON for 150msec to detect the atmospheric pressure when one of the conditions below is present: • Engine speed = 0rpm • Starter is ON • Idle is stable (2) Turbo Pressure Measurement Conditions • The VSV …

• 13. FUEL INJECTION PRESSURE CONTROL

  13.1 Fuel Injection Pressure z The engine ECU determines the fuel injection pressure based on the final injection quantity and the engine speed. The fuel injection pressure at the time the engine is started is calculated from the coolant t …