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Home >> Toyota >> 2020 >> RAV4 Adventure >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (A25A-FKS) (W/ Canister Pump Module) - Diagnostic Codes (7 Of 7) & Circuit Tests (1 Of 2) >> SFI SYSTEM (w/ Canister Pump Module) >> DTC U1103-87: Lost Communication with Stop and Start Control Module Missing Message [11/2018 - 08/2020] >> Description
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DTC U1103-87: Lost Communication with Stop and Start Control Module Missing Message [11/2018 - 08/2020]: Description

The ECM and engine stop and start ECU send and receive signals via CAN communication.

If a communication error occurs between the ECM and engine stop and start ECU, the ECM stores this DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
U1103-87 Lost Communication with Stop and Start Control Module Missing Message There is no communication between the ECM and engine stop and start ECU (1 trip detection logic).
  • ECM
  • Engine Stop and Start ECU
  • CAN Communication System
Does not come on DTC stored SAE Code: U1103