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Home >> Lexus >> 2021 >> LS 500 Base, AWD >> Repair and Diagnosis (Single Page) >> Transmission >> Transmission Control Systems >> Electronic A/T Shift Lever System (Aga0F) - Diagnostics - Introduction (1 Of 2) >> Electronic Shift Lever System >> Fail-Safe Chart [12/2017 - 10/2020] >> Fail-Safe Chart [12/2017 - 10/2020]

Fail-Safe Chart [12/2017 - 10/2020]

If the shift control ECU detects a malfunction, a fail-safe function in the following table will be operated.

DTC No. Fail-safe Function Problem Symptoms Message displayed on multi-information display
P0850-11
P0850-15		 - The shift state cannot be changed to park (P) by P position switch P switch malfunction Apply parking brake securely when parking See owner's manual
P085D-46 - - Shift system malfunction See owner's Service Information
P085D-94 -
  • Driving unavailable
  • The shift state cannot be changed to park (P)
  • The shift state cannot be changed from park (P) to any other state
 Shift system unavailable Apply parking brake securely when parking See owner's Service Information
P08A6-00
P08A6-62
P1834-11
P1834-15
P183A-11
P183A-15
P183F-12
P183F-14
P1845-12
P1845-14		 -
  • The shift state may not be changed to drive (D), reverse (R) or manual (M)
  • The shift state may not be changed from park (P) to any other state
 Shift system malfunction Stop in a safe place See owner's Service Information
P1760-87 - - Shift system malfunction See owner's Service Information
P1761-A2 - When the engine switch on (IG), the shift position display (meter position indicator and shift position indicator) may turn off. Shift system malfunction See owner's Service Information
P1765-A2 -
  • Shift state cannot be switched to park (P) while the battery is depleted.
  • The indicator may turn off temporarily when starting the engine.
  • Switching the shift state may be temporarily unresponsive immediately after the engine is turned on
 Shift system malfunction See owner's Service Information
P1769-49 Turns 3-phase motor power source relay OFF
  • The shift state cannot be changed to drive (D), reverse (R) or manual (M)
  • The shift state cannot be changed from park (P) to any other state
  • The engine cannot be started
 Shift system unavailable Apply parking brake securely when parking See owner's Service Information
P176A-87 - - Shift system malfunction See owner's Service Information
P176B-9F - - Shift system malfunction See owner's Service Information
P176C-62
P271A-11
P271A-15
P271C-11
P271C-15		 - The engine may not be started Shift system malfunction See owner's Service Information
P176D-12 - Battery may deplete sooner Shift system malfunction See owner's Service Information
P1C89-49
P1C8A-49
P1C8B-49
P1C8C-49
P1C8D-49		 Changing shift state to park (P) is prohibited.
Changing the shift state from park (P) to any other state may possible.
  • The shift state cannot be changed to park (P)
  • The engine cannot be started
 Shift system malfunction Apply parking brake securely when parking See owner's Service Information
P1C8E-49 Turns 3-phase motor power source relay OFF
  • The shift state cannot be changed to park (P)
  • The engine cannot be started
  • The shift state cannot be changed from park (P) to any other state
 Shift system malfunction Apply parking brake securely when parking See owner's Service Information
P1C8F-14
P1C94-14
P1C99-14		 Turns 3-phase motor power source relay OFF
  • The shift state cannot be changed to park (P)
  • The engine cannot be started
  • The shift state cannot be changed from park (P) to any other state
 Shift system malfunction Apply parking brake securely when parking See owner's Service Information
P272C-00 Changing shift state to park (P) is prohibited.
Changing the shift state from park (P) to any other state may possible.
  • The shift state cannot be changed to park (P)
  • The engine cannot be started
 Shift system malfunction Apply parking brake securely when parking See owner's Service Information
P272C-73 Turns 3-phase motor power source relay OFF - Shift system malfunction See owner's Service Information
U0100-00 - - Shift system malfunction See owner's Service Information
U0103-87 - The shift state cannot be changed to manual (M) Shift system malfunction See owner's Service Information
Changing the shift state is prohibited while driving at 11 km/h (7 mph) or more Shift position cannot be changed Shift system malfunction Shifting unavailable Drive to a safe place and stop
Changing the shift state to neutral (N) while driving at less than 11 km/h (7 mph) Driving unavailable Shift system malfunction Driving unavailable
U0140-00 - - Shift system malfunction See owner's Service Information
U1107-00 - The automatic park (P) function does not operate Shift system malfunction Apply parking brake securely when parking See owner's Service Information
U1170-00 - A shock may be felt when switching the shift state from park (P) to a state other than park (P) Shift system malfunction See owner's Service Information
Stop vehicle in a safe place Push P switch
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