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Home >> Lexus >> 2014 >> IS 250C Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostic Codes (P0630-U0101) & Circuit Tests) >> SFI System >> Circuit Tests >> Cold Start Injector Circuit [08/2013 - ] >> Procedure
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Cold Start Injector Circuit [08/2013 - ]: Procedure

  1. INSPECT COLD START INJECTOR 
    1. Inspect the cold start injector. Refer to INSPECTION [08/2013 - ] .

    NG → See step   4 

    OK: Go to next step 

  2. INSPECT ECM (STJ1 VOLTAGE) 
    1. Turn the engine switch on (IG).
      GTY354066Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified condition
      E3-7 (STJ1) - E4-7 (E1) Engine switch on (IG) 11 to 14 V
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (ECM)

    NG → See step   3 

    OK → See step   5 

  3. CHECK HARNESS AND CONNECTOR (COLD START INJECTOR - ECM) 
    1. Disconnect the cold start injector connector.
    2. Disconnect the ECM connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified condition
      E57-1 - E3-7 (STJ1) Always Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified condition
      E57-1 or E3-7 (STJ1) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → REPAIR OR REPLACE HARNESS OR CONNECTOR (IG2 RELAY - COLD START INJECTOR) 

  4. REPLACE COLD START INJECTOR. Refer to  REMOVAL [08/2013 - ] 
  5. REPLACE ECM. Refer to  REMOVAL [08/2013 - ]