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Home >> Lexus >> 2020 >> LS 500h AWD >> Repair and Diagnosis (Single Page) >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System - Diagnostic Codes (4 Of 7) >> Electronically Controlled Brake System >> DTC C1311: Open Circuit in Main Relay 1; DTC C1312: Short Circuit in Main Relay 1; DTC C1313: Open Circuit in Main Relay 2; DTC C1314: Short Circuit in Main Relay 2 [09/2018 - 09/2019] >> Component Operating Range
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Component Operating Range

C12FA

All of the following conditions are met -
Main relay 1 On
Brake system voltage 1 Off
Main relay 1 monitor 3.5 V or more
C12FB

All of the following conditions are met -
Main relay 1 Off
C0597 (Case 1, 2 and 3) Not detected
BS01 voltage Less than 6.5 V
C130C

All of the following conditions are met -
Main relay 2 On
Brake system voltage 2 Off
Main relay 2 monitor 3.5 V or more
C130D

All of the following conditions are met -
Main relay 2 Off
C0597 (Case 1, 2 and 3) Not detected
BS02 voltage Less than 6.5 V
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