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Home >> Lexus >> 2018 >> RX 450h Base >> Repair and Diagnosis (Single Page) >> Brakes >> Traction Control >> Electronically Controlled Brake System (Diagnostic Codes) (3 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 [08/2019 - 07/2020] >> Typical Enabling Conditions
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Typical Enabling Conditions

C12FA AND C130C

Monitor runs whenever the following DTCs are not stored C130D: Brake pressure control solenoid main relay 2 short circuit
Either of the following condition is met -
Brake system voltage Higher than 7 V
After main relay ON, main relay monitor on experience Not existing
C12FB AND C130D

Monitor runs whenever the following DTCs are not stored C0597 (Case 1): EEPROM malfunction
C0597 (Case 2): Lost communication
C0597 (Case 3 and 5): CPU malfunction
C0597 (Case 4): IC malfunction
Command to main relay Off
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