Category Archives: FUSO 4M4

#201 Inspection of relay (normally open, 5 pins) • Perform a continuity check and an operation check. If there is any abnormality, replace the relay. #305 Inspection of air temperature sensor <Intake air temperature sensor 1> • Place the sensor in a container filled with engine oil. • Heat the oil to each of the… Read More »

6. 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 number in section “3. Inspections… Read More »

• It is possible to see service data and actuator tests simultaneously.  

• It is possible to see service data and actuator tests simultaneously.

3.1 Diagnosis code list • Diagnosis codes shown by the Multi-Use Tester and those indicated by flashing of the warning lamp are different. • The Multi-Use Tester is capable of showing more detailed diagnosis codes. • The control during fault recovers by servicing the faults. However, for some diagnosis codes, the warning lamp stays illuminated… Read More »

• Before measuring voltage, check the battery for charged condition and specific gravity. If system inspection is performed with the battery uncharged or reduced in specific gravity, accurate measurements cannot be achieved. • Before disconnecting battery cables, harnesses and connectors, set the starter switch to LOCK or OFF, then allow at least 20 seconds. •… Read More »

• Carry out system inspection in accordance with the flow chart given below.