Purpose of inspection
Inspect the condition of the ECU (input signal, output signal) when the malfunction occurs and determine the cause by checking the data of ECU.
• Freeze frame data
Freeze frame Read more Automotive Troubleshooting Data of ECU Inspection
Diagnostic Inspection
Outline
To efficiently proceed with troubleshooting, use diagnostic codes in order to identify the malfunctioning area. The following are judged by identifying the codes.
• When Read more Automotive Troubleshooting Diagnostic
With regards to the inspection for troubleshooting, besides the inspection method you have learned, a method to identify the malfunction location is needed. When you troubleshoot, combine several inspections Read more Automotive Troubleshooting Outline
Diagnostic Questioning
Diagnostic questioning involves asking the customer about the conditions when the symptoms occurred to reproduce those symptoms.
1. What the technician must keep in mind when performing Read more Verifying and Reproducing the Symptoms for automotive technicians
How to Approach Troubleshooting
The most important points for troubleshooting Your Automotive
• Correctly identify the symptoms of the malfunction. When troubleshooting, it is important to correctly Read more Fundamentals of Automotive Troubleshooting
The intake shutter is mounted on the intake manifold. The intake shutter is fully open when the engine is operating. To stop the engine, the VSV operates in accordance with the signals from the ECU, and Read more Outline and Operation of Intake Shutter
The diesel throttle is mounted on the intake manifold. The throttle valve, which operates independently from the accelerator pedal, uses the diesel throttle control motor (step motor) to regulate the throttle Read more Diesel Throttle Outline (1CD-FTV/15B-FTE)
Determining Common-rail Fuel Pressure
A fuel pressure that matches the operating conditions of the engine is calculated according to the actual injection volume that has been determined based on the signals Read more Diesel Engine Fuel Pressure Control
Conventional EFI-diesel
Common-rail EFI-diesel
4. Comparison of the target injection timing and the actual injection timing
As with the convention EFI-diesel, the basic injection timing of the Read more Determining Injection Timing Reference
1. Engine speed correction control
Symptom:
Increased injection volume due to a rise in the pressure in the pump.
Description of control:
Injection volume reduced according to the engine speed.