Category Archives: FUSO 4M4

FUSO 4M4 – FUEL AND ENGINE CONTROL – FUEL TANK

• Insert the air vent tube into fuel tank bracket, while taking care not to pinch or crush with the fuel tank band. Installation procedure •Installation: Fuel check valve Install the fuel check valve at the illustrated angle.  

FUSO 4M4 – FUEL AND ENGINE CONTROL – INJECTOR

• Before removing the injectors, check injector mounting holes for trapped water and oil. • If any abnormality of the injector is found, replace it. Assembly sequence Follow the disassembly sequence in reverse. Installation procedure •Installation: Injection pipe – Ensure that the pipe and mounting surfaces of the connector are flat and free from damage.… Read More »

FUSO 4M4 – FUEL AND ENGINE CONTROL – COMMON RAIL

• If any abnormality of the common rail is found, replace it. Assembly sequence Follow the disassembly sequence in reverse. Removal procedure Removal: Injection pipe and fuel pipe Installation procedure •Installation: Injection pipe and fuel pipe – Ensure that the pipe and mounting surfaces of the connector are flat and free from damage. – Bring… Read More »

FUSO 4M4 – FUEL AND ENGINE CONTROL – TROUBLESHOOTING – Inspections Performed at Electronic Control Unit Connectors

• These inspections aid troubleshooting by enabling you to check whether electronic control unit signals are being correctly transmitted via the vehicle harness and connectors. The white-on-black numbers ( 01 , 02 , and so on) correspond to the similarly printed reference numbers in section “3. Inspections Based on Diagnosis Codes”. Electronic control unit connector… Read More »