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Home >> Lexus >> 2021 >> LS 500 Base, AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System - Diagnostic Codes (14 Of 14), Circuit Tests & Symptom Tests (1 Of 4) >> SFI System >> DTC U1176-87: Lost Communication with Gear Shift Control Module "A" (Powertrain Bus) Missing Message [12/2017 - ] >> Description

DTC U1176-87: Lost Communication with Gear Shift Control Module "A" (Powertrain Bus) Missing Message [12/2017 - ]: Description

The ECM and shift control ECU send and receive signals via CAN communication.

If a communication error occurs between the ECM and shift control ECU, the ECM stores this DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
U1176-87 Lost Communication with Gear Shift Control Module "A" (Powertrain Bus) Missing Message There is no communication between the ECM and shift control ECU (1 trip detection logic).
  • CAN communication system
  • Shift control ECU
  • ECM
- DTC stored SAE: U1176