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Home >> Toyota >> 2023 >> GR86 Base, Automatic Trans >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System - Diagnostic Codes (6 Of 6) & Circuit Tests >> SFI System >> DTC U0073: Control Module Communication Bus Off [11/2021 - ] >> Monitor Description
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Monitor Description

OUTLINE OF DIAGNOSIS 

Detect malfunction of CAN communication.

Judge as NG when CAN communication failure has occurred.

COMPONENT DESCRIPTION 

(Common specifications)

CAN Protocol 2.0 B (active)

Frame Format: 11 Bit ID Frame (standard frame)

Conforms to ISO11898

Communication speed: 500 kbps

EXECUTION CONDITION 

Secondary parameters Execution condition
Battery voltage 10.9 V or higher

GENERAL DRIVING CYCLE 

Perform the diagnosis continuously after starting the engine.

DIAGNOSTIC METHOD 

Judge as NG when the following conditions are established.

Judgment value 

Malfunction Criteria Threshold Value
CAN bus condition Bus off

Time needed for diagnosis 

436 ms

Malfunction indicator light illumination 

Illuminates as soon as a malfunction occurs.