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Home >> Lexus >> 2013 >> GS 450h >> Repair and Diagnosis (Single Page) >> Brakes >> Traction Control >> Electronically Controlled Brake System (Diagnostic Codes & Symptom Tests) >> Electronically Controlled Brake System >> DTC C1311/11: Open in Main Relay 1 Circuit; DTC C1312/12: Short in Main Relay 1 Circuit; DTC C1313/13: Open in Main Relay 2 Circuit; DTC C1314/14: Short in Main Relay 2 Circuit >> Description
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DTC C1311/11: Open in Main Relay 1 Circuit; DTC C1312/12: Short in Main Relay 1 Circuit; DTC C1313/13: Open in Main Relay 2 Circuit; DTC C1314/14: Short in Main Relay 2 Circuit: Description

The ABS main relay supplies power to the changeover solenoid and the linear solenoid.

The ABS main relay remains on for approximately 2 minutes after the power switch is turned off and the input of brake pedal operation signals stops, and supplies power to the system to keep it ready to operate.

DTC Code INF Code DTC Detection Condition Trouble Area
C1311/11 1 Either of the following is detected:
  1. Relay contact is off (BS01 terminal is less than 3.5 V) for at least 0.2 seconds when +BI1 terminal voltage is 7.9 V or more and ABS main relay 1 is on.
  2. +BI1 terminal voltage is less than 7.9 V and ABS main relay 1 cannot be on for at least 0.2 seconds when ABS main relay 1 is turned on (BS01 terminal is 3.5 V or more).
  • ABS main relay 1 circuit
  • Skid control ECU assembly
C1312/12 3 Relay contact is on (BS01 terminal is 6.5 V or more) for at least 1 second when ABS main relay 1 is off. โ†‘
C1313/13 4 Either of the following is detected:
  1. Relay contact is off (BS02 terminal is less than 3.5 V) for at least 0.2 seconds when +BI2 terminal voltage is 7.9 V or more and ABS main relay 2 is on.
  2. +BI2 terminal voltage is less than 7.9 V and ABS main relay 2 cannot be on for at least 2 seconds when ABS main relay 2 is turned on (BS02 terminal is 3.5 V or more).
  • ABS main relay 2 circuit
  • Skid control ECU assembly
C1314/14 6 Relay contact is on (BS02 terminal is 6.5 V or more) for at least 1 second when ABS main relay 2 is off. โ†‘