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Home >> Lexus >> 2002 >> SC 430 >> Repair and Diagnosis (Single Page) >> Brakes >> Anti-Lock Brakes >> Abs With EBD & BA & TRAC & VSC System - Diagnosis >> DTC C0278/11: Open Circuit In Abs Solenoid Relay Circuit, DTC C0279/12: Short Circuit In Abs Solenoid Relay Circuit >> Circuit Description

Circuit Description

This relay supplies power to each ABS solenoid. After the ignition switch is turned ON, if the initial check is OK, the relay goes on.

DTC TROUBLE DETECTION

DTC No. DTC Detecting Condition Trouble Area
C0278/11 Conditions 1. and 2. continue for 0.2 sec. or more:
  1. ECU terminal IG1 voltage is 9.5 V to 17.0 V and the solenoid relay is ON, however, the contact point of the solenoid relay is OFF.
  2. With solenoid relay ON, ECU terminal IG1 voltage becomes 9.5 V or less and the contact point of the solenoid relay does not become ON.
  • ABS solenoid relay
  • ABS solenoid relay circuit
C0279/12 Immediately after ECU terminal IG1 becomes ON, and solenoid relay is OFF, however, when the condition that the solenoid relay due to the contact point is ON continues for 0.2 sec. or more.
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