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Home >> Lexus >> 2014 >> IS 250 Base, AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (4GR-FSE) - Diagnostics - Introduction (1 Of 2) >> SFI System >> Check For Intermittent Problems [04/2013 - 08/2015] >> Check For Intermittent Problems [04/2013 - 08/2015]

Check For Intermittent Problems [04/2013 - 08/2015]

HINT: 

Inspect the vehicle ECM using check mode. Intermittent problems are easier to detect with the Techstream when the ECM is in check mode. In check mode, the ECM uses 1 trip detection logic, which is more sensitive to malfunctions than normal mode (default), which uses 2 trip detection logic.

  1. Clear the DTCs.

    Refer to DTC CHECK / CLEAR [04/2013 - 08/2015] 

  2. Switch the ECM from normal mode to check mode using the Techstream.

    Refer to CHECK MODE PROCEDURE [04/2013 - 08/2015] 

  3. Perform a simulation test.

    Refer to HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - 06/2014] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2014 - 08/2015]

  4. Check and wiggle the harness(es), connector(s) and terminal(s).

    Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [04/2013 - ]

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