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Home >> Lexus >> 2020 >> LS 500 Base, AWD >> Repair and Diagnosis (Single Page) >> Transmission >> Transmission Control Systems >> Electronic A/T Shift Lever System (Aga0F) - Diagnostic Codes (5 Of 5), Circuit & Symptom Tests (1 Of 2) >> Electronic Shift Lever System >> DTC U0100-00: Lost Communication with ECM/PCM "A" Missing Message (Powertrain Bus); DTC U0140-00: Lost Communication with Body Control Module (Sub) Missing Message; DTC U1107-00: Lost Communication with Power Management Module (Gear Shift Control Module "A"); DTC U1170-00: Lost Communication with Brake System Control Module (Gear Shift Control Module "A") [12/2017 - ] >> Description
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DTC U0100-00: Lost Communication with ECM/PCM "A" Missing Message (Powertrain Bus); DTC U0140-00: Lost Communication with Body Control Module (Sub) Missing Message; DTC U1107-00: Lost Communication with Power Management Module (Gear Shift Control Module "A"); DTC U1170-00: Lost Communication with Brake System Control Module (Gear Shift Control Module "A") [12/2017 - ]: Description

The shift control ECU transmits and receives signals via CAN communication to and from the main body ECU (multiplex network body ECU), ECM, skid control ECU and certification ECU (smart key ECU assembly).

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
U0100-00 Lost Communication with ECM/PCM "A" Missing Message (Powertrain Bus) 3 seconds elapse after turning engine switch on (IG) with battery voltage 10 V or higher and a CAN communication malfunction between ECM occurs continuously for 1 second or more.
(1 trip detection logic)
CAN communication system Does not come on
  • Master Warning Light
    • Comes on
  • Multi-information Display Error Message
    • Displayed
U0140-00 Lost Communication with Body Control Module (Sub) Missing Message 2 seconds elapse after turning engine switch on (IG) with battery voltage 10 V or higher and a CAN communication malfunction between main body ECU (multiplex network body ECU) occurs continuously for 3.6 seconds or more.
(1 trip detection logic)
CAN communication system Does not come on
  • Master Warning Light
    • Comes on
  • Multi-information Display Error Message
    • Displayed
U1107-00 Lost Communication with Power Management Module (Gear Shift Control Module "A") 3 seconds elapse after turning engine switch on (IG) with battery voltage 10 V or higher and a CAN communication malfunction between certification ECU (smart key ECU assembly) occurs continuously for 3.6 seconds or more.
(1 trip detection logic)
CAN communication system Does not come on
  • Master Warning Light
    • Comes on
  • Multi-information Display Error Message
    • Displayed
U1170-00 Lost Communication with Brake System Control Module (Gear Shift Control Module "A") 3 seconds elapse after turning engine switch on (IG) with battery voltage 10 V or higher and a CAN communication malfunction between skid control ECU occurs continuously for 2.2 seconds or more.
(1 trip detection logic)
CAN communication system Does not come on
  • Master Warning Light
    • Comes on
  • Multi-information Display Error Message
    • Displayed