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Home >> Lexus >> 2024 >> TX 350 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 89 (Smart Access System (For Start) - Diagnostic Codes (2 Of 2) & Symptom Tests) >> SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function, except Gasoline Model) >> Power Source Mode does not Change to ON (IG) [09/2023 - ] >> Description

Power Source Mode does not Change to ON (IG) [09/2023 - ]: Description

WARNING: This page is about a different car, the 2024 Lexus TX 550h+ and 2024 Lexus TX 500h. However, it is still accessible from the selected car via links, so may be relevant.

If the power 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 but does change to 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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