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Home >> Lexus >> 2025 >> NX 350h >> Repair and Diagnosis >> External Pages >> Different car >> Section 61 (Smart Access System (For Start) - Symptom Tests (2 Of 2)) >> SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function, Gasoline Model) >> Power Source Mode does not Change to ON (IG) [11/2021 - ] >> Description

Power Source Mode does not Change to ON (IG) [11/2021 - ]: Description

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If the engine switch is pressed with the electrical key transmitter sub-assembly in the cabin, the certification ECU (smart key ECU assembly) receives a signal and changes the power source mode.

RELATED DATA LIST AND ACTIVE TEST ITEMS

Problem Symptom Data List and Active Test
Power source mode does not change to on (IG) but does change to on (ACC) Power Source Control 
  • Power Supply Condition
  • IGP Relay Circuit (Outside) Monitor
  • IGP Relay Circuit (Inside) Monitor
  • IGR Relay Circuit (Outside) Monitor
  • IGR Relay Circuit (Inside) Monitor
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