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Home >> Scion >> 2012 >> tC Automatic Trans >> Repair and Diagnosis (Single Page) >> Electrical >> Starter >> Smart Key System (For Starting) (Diagnostic Codes & Symptom Tests) >> SMART KEY SYSTEM (for Start Function) >> SYYMPTOM Tests >> Power Source Mode Does Not Change To ON (ACC) >> Procedure

Power Source Mode Does Not Change To ON (ACC): Procedure

  1. CHECK DTC (ALL) See step   1 

    NG → GO TO DTC CHART 

    OK: Go to next step 

  2. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (ACC RELAY) See step   3 

    NG → REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) See step   4 

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  4. CHECK POWER SOURCE CONTROL ECU See step   5 

    NG → See step   6 

    OK → See step   5 

  5. USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING 
  6. REPLACE POWER SOURCE CONTROL ECU. Refer to  REMOVAL 
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