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Home >> Lexus >> 2019 >> LS 500 Base, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Smart Access System (For Start) - Diagnostics - Introduction (1 Of 2) >> SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function) >> Problem Symptoms Table [12/2017 - 10/2022] >> Problem Symptoms Table [12/2017 - 10/2022]
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Problem Symptoms Table [12/2017 - 10/2022]

HINT: 

SMART ACCESS SYSTEM WITH PUSH-BUTTON START (FOR START FUNCTION)

Symptom Suspected Area Link
Power source mode does not change to on (IG) and on (ACC) Smart Access System with Push-button Start (for Entry Function) Refer to Power Source Mode does not Change to ON (IG and ACC) [12/2017 - 10/2023]
Affected by Wave Interference
Transmitter Battery
Electrical Key Transmitter Sub-assembly
No. 1 Indoor Electrical Key Antenna Assembly (Front Floor)
No. 2 Indoor Electrical Key Antenna Assembly (Rear Floor)
Engine Switch
Harness or Connector
Instrument Panel Junction Block Assembly
Certification ECU (Smart Key ECU Assembly)
Power source mode does not change to on (ACC) Harness or Connector Refer to Power Source Mode does not Change to ON (ACC) [12/2017 - 10/2023]
Relay
  • ACC D Relay
  • ACC P Relay
  • LUG-ACC Relay
Instrument Panel Junction Block Assembly
Passenger Side Junction Block Assembly
Certification ECU (Smart Key ECU Assembly)
Power source mode does not change to on (IG) Harness or Connector Refer to Power Source Mode does not Change to ON (IG) [12/2017 - 10/2023]
Relay
  • IG1 D NO. 1 Relay
  • IG1 D NO. 2 Relay
  • IG2 D Relay
  • IG1 P NO. 1 Relay
  • IG1 P NO. 2 Relay
  • IG2 P Relay
  • IG1 Relay
  • IG2 NO. 2 Relay
  • LUG-IG1 NO. 1 Relay
  • LUG-IG1 NO. 2 Relay
Instrument Panel Junction Block Assembly
Passenger Side Junction Block Assembly
Certification ECU (Smart Key ECU Assembly)
Engine does not Start SFI System Refer to Engine does not Start [12/2017 - 10/2020] , or refer to Engine does not Start [10/2020 - 10/2022]
Immobiliser Function
Steering Lock Function
Harness or Connector
Shift Control ECU
Stop Light Switch Assembly
Certification ECU (Smart Key ECU Assembly)
New key cannot be registered Lin Communication System Refer to New Key cannot be Registered [12/2017 - 10/2022]
Meter / Gauge System
Reregistration
Electrical Key Transmitter Sub-assembly
Steering Lock ECU (Steering Lock Actuator with ECU Assembly)
ID Code Box (Immobiliser Code ECU)
Certification ECU (Smart Key ECU Assembly)
Additional key cannot be registered Steering Lock Function Refer to Additional Key cannot be Registered [12/2017 - 10/2022]
Electrical Key Transmitter Sub-assembly
Certification ECU (Smart Key ECU Assembly)
New Key registration warning message is not displayed Lighting System Refer to New Key Registration Warning Message is not Displayed [12/2017 - 10/2023]
Meter / Gauge System
Certification ECU (Smart Key ECU Assembly)
"Key Battery Low Replace Key Battery" is Displayed on the Multi-information Display Transmitter Battery Refer to "Key Battery Low Replace Key Battery" is Displayed on the Multi-information Display [12/2017 - 10/2023]
Unable to Unlock Steering Wheel (Engine cannot Start) Harness or Connector Refer to Unable to Unlock Steering Wheel (Engine cannot Start) [12/2017 - 10/2022]
Steering Lock ECU (Steering Lock Actuator with ECU Assembly)
ID Code Box (Immobiliser Code ECU)
Certification ECU (Smart Key ECU Assembly)
Steering Lock does not Lock Lighting System Refer to Steering Lock does not Lock [12/2017 - 10/2022]
Harness or Connector
Steering Lock ECU (Steering Lock Actuator with ECU Assembly)
ID Code Box (Immobiliser Code ECU)
Certification ECU (Smart Key ECU Assembly)
Security Indicator Light Does not Blink Harness or Connector Refer to Security Indicator Light Does not Blink [12/2017 - 10/2023]
Security Indicator Light (Integration Control and Panel Assembly)
Main Body ECU (Multiplex Network Body ECU)
Certification ECU (Smart Key ECU Assembly)
Immobiliser System does not Operate Properly SFI System Refer to Immobiliser System does not Operate Properly [12/2017 - 10/2023]
Register ECU Communication ID
Harness or Connector
ID Code Box (Immobiliser Code ECU)
ECM