Sfi System - Basic Inspection

Lexus IS250 IS220d GSE20 ALE20 4GR-FSE ENGINE CONTROL SYSTEM


SFI SYSTEM - BASIC INSPECTION

When the malfunction is not confirmed by the DTC check, troubleshooting should be carried out in all circuits considered to be possible causes of the problem. In many cases, by carrying out the basic engine check shown in the following flowchart, the location of the problem can be found quickly and efficiently. Therefore, using this check is essential when engine troubleshooting.

1.CHECK BATTERY VOLTAGE
  • NOTICE:
  • Carry out this check with the engine stopped and engine switch OFF.
  • Result:
  • ResultProceed to
    11 V or moreOK
    Below 11 VNG
NG.
CHARGE OR REPLACE BATTERY
OK
2.CHECK WHETHER ENGINE WILL CRANK
NG.
PROCEED TO PROBLEM SYMPTOMS TABLE
OK
3.CHECK WHETHER ENGINE STARTS
NG.
GO TO STEP 6
OK
4.CHECK AIR FILTER

Visually check that the air filter is not excessively contaminated with dirt or oil.

NG.
REPLACE AIR FILTER
OK
5.CHECK IDLING SPEED
NG.
TROUBLESHOOT IDLING SPEED AND PROCEED TO NEXT STEP
OK
6.CHECK FUEL PRESSURE
NG.
TROUBLESHOOT FUEL PRESSURE AND PROCEED TO NEXT STEP
OK
7.CHECK FOR SPARK
NG.
TROUBLESHOOT SPARK AND PROCEED TO NEXT STEP
OK
PROCEED TO PROBLEM SYMPTOMS TABLE