C1311 - Open In Main Relay 1 Circuit

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • Faulty Anti-Lock Brake System (ABS) Main Relay 1
  • ABS Main Relay 1 harness is open or shorted
  • ABS Main Relay 1 circuit poor electrical connection

Possible symptoms

  • Anti-Lock Brake System (ABS) Warning Light ON
  • Engine Light ON (or Service Engine Soon Warning Light)

C1311 Description

The Anti-Lock Brake System (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 ignition 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 ignition switch is off.
OBDII Code C1311 - Open In Main Relay 1 Circuit - AutoCodes.com

C1311 Information for specific makes

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