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Home >> Toyota >> 2006 >> Corolla LE, Automatic >> Repair and Diagnosis >> Brakes >> Anti-Lock Brakes >> Brakes - Abs With EBD (Diagnostics) >> DTC C0278/11, C0279/12: Open/Short Circuit In Abs Solenoid Relay Circuit >> Inspection Procedure

Inspection Procedure

  1. INSPECT FUSE (ABS NO.1 FUSE) 
    1. Remove the ABS No.1 fuse from the engine room R/B.
    2. Measure the resistance according to the value(s) in ABS NO. 1 FUSE RESISTANCE   .

      Standard: 

      ABS NO. 1 FUSE RESISTANCE

      Tester Connection Specified Condition
      ABS No.1 fuse Below 1 Ω (Continuity)
      Fig 1: Inspecting Fuse (ABS No. 1 Fuse)
      G02599626Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: CHECK FOR SHORT IN ALL HARNESSES AND CONNECTORS CONNECTED FUSE AND REPLACE FUSE 
    2. OK: GO TO NEXT STEP. 
  2. INSPECT SKID CONTROL ECU CONNECTOR (+BS TERMINAL VOLTAGE) 
    1. Disconnect the skid control ECU connector.
    2. Measure the voltage according to the value(s) in SKID CONTROL ECU CONNECTOR TERMINALS VOLTAGE  .

      Standard: 

      SKID CONTROL ECU CONNECTOR TERMINALS VOLTAGE

      Tester Connection Condition Specified Condition
      S1-2(+BS)-Body ground Always 10 to 14 V
      Fig 2: Inspecting Skid Control ECU Connector (+BS Terminal Voltage)
      G02599627Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR(+BS CIRCUIT) 
    2. OK: GO TO NEXT STEP. 
  3. INSPECT SKID CONTROL ECU CONNECTOR (GND TERMINAL) 
    1. Disconnect the skid control ECU connector.
    2. Measure the resistance according to the value(s) in SKID CONTROL ECU CONNECTOR TERMINALS RESISTANCE  .

      Standard: 

      SKID CONTROL ECU CONNECTOR TERMINALS RESISTANCE

      Tester Connection Specified Condition
      S1-1 (GND1) - Body ground Below 1 Ω
      S1-32 (GND2) - Body ground Below 1 Ω
      Fig 3: Inspecting Skid Control ECU Connector (GND Terminal)
      G02599628Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR(GND CIRCUIT) 
    2. OK: GO TO NEXT STEP. 
  4. RECONFIRM DTC 
    1. Clear the DTCs (see DTC CHECK/CLEAR ).
    2. Drive the vehicle at a speed of 4 mph (6 km/h) or more.
    3. Are the same DTCs recorded?

      HINT:

      The skid control ECU inspects the solenoid relay circuit when the stop lamp switch is turned off and the vehicle is running at a speed of 4 mph (6 km/h) or more.

    1. NO: END 

      HINT:

      These DTCs may be memorized due to a malfunction in the connector terminal connection, etc.

    2. YES: REPLACE BRAKE ACTUATOR ASSY (SEE  REPLACEMENT  ) 
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