DIAGNOSIS SYSTEM CHECK DLC3 (a) Check the DLC3. Click here CHECK WARNING LIGHT (a) When a problem occurs in the power steering system, the EPS warning light in the combination meter assembly comes on to inform the driver of the problem. 
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Center Airbag Sensor Assembly: Installation
INSTALLATION PROCEDURE 1. INSTALL AIRBAG ECU ASSEMBLY (a) Check that the engine switch (for Gasoline Model) or power switch (for HV Model) is off. (b) Check that the cable is disconnected from the negative (-) auxiliary battery terminal. CAUTION: Wait at least 90 seconds after disconnecting the cabl ...
