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Home >> Toyota >> 2009 >> Prius Base >> Repair and Diagnosis >> Brakes >> Traction Control >> Brake Control >> 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

ABS main relay 1 (ABS NO. 1 relay) supplies power to the changeover solenoid and the linear solenoid. ABS main relay 2 (ABS NO. 2 relay) goes on for approximately 5 seconds after the power switch is turned off and the braking effort signal input is terminated. ABS main relay 2 (ABS NO. 2 relay) supplies electricity and maintains operating condition for the brake system when the power switch is OFF.

DTC RESULT REFERENCE

DTC No. INF Code DTC Detection Condition Trouble Area
C1311/11 1 When either condition below is met:
  • Relay contact is off (BS 1 terminal is less than 3.5 V) for at least 0.2 sec. when R1 + terminal voltage is 9.5 V or more and main relay 1 is on.
  • R1+ terminal voltage is less than 9.5 V and main relay 1 cannot be on for at least 0.2 sec. when main relay 1 is turned on (BS 1 terminal is 3.5 V or more).
  • ABS main relay 1 (ABS NO. 1 relay)
  • Skid control ECU
  • Harness and connector
C1312/12 3 Relay contact is on for at least 4 sec. when main relay 1 is off.
  • ABS main relay 1 (ABS NO. 1 relay)
  • Skid control ECU
  • Harness and connector
C1313/13 4 When either condition below is met:
  • Relay contact is off (BS2 terminal is less than 3.5 V) for at least 0.2 sec. when R2+ terminal voltage is 9.5 V or more and main relay 2 is on.
  • R2+ terminal voltage is less than 9.5 V and main relay 2 cannot be on for at least 2 sec. when main relay 2 is turned on (BS 1 terminal is 3.5 V or more).
  • ABS main relay 2 (ABS NO. 2 relay)
  • Skid control ECU
  • Harness and connector
C1314/14 6 Relay contact is on for at least 4 sec. when main relay 2 is off.
  • ABS main relay 2 (ABS NO. 2 relay)
  • Skid control ECU
  • Harness and connector