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Home >> Toyota >> 2009 >> Avalon XLS >> Repair and Diagnosis >> Brakes >> Traction Control >> Brake Control >> Vehicle Stability Control System >> Symptom Tests >> ABS Warning Light Remains ON >> Inspection Procedure

Inspection Procedure

NOTE: When replacing the ABS & TRACTION actuator assembly, perform zero point calibration (See CALIBRATION ).
  1. INSPECT CAN COMMUNICATION SYSTEM 
    1. Check if the CAN communication system DTC is output (See DIAGNOSIS SYSTEM ).

    Result 

    RESULT REFERENCE

    Result Proceed to
    DTC is not output A
    DTC Is output B

    B: REPAIR CAN COMMUNICATION SYSTEM 

    A: Go to next step 

  2. INSPECT MULTIPLEX COMMUNICATION SYSTEM 
    1. Check if the multiplex communication system DTC is output (See DTC CHECK / CLEAR ).

    Result 

    RESULT REFERENCE

    Result Proceed to
    DTC is not output A
    DTC is output B

    B: REPAIR MULTIPLEX COMMUNICATION SYSTEM 

    A: Go to next step 

  3. INSPECT IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED 
    1. Check the skid control ECU connector's connecting condition.

    OK: 

    The connector should be securely connected. 

    NG: CONNECT CONNECTOR TO ECU CORRECTLY 

    OK: Go to next step 

  4. INSPECT BATTERY 
    1. Check the battery voltage.

    Voltage: 

    11 to 14 V 

    NG: INSPECT CHARGING SYSTEM 

    OK: Go to next step 

  5. INSPECT SKID CONTROL ECU TERMINAL VOLTAGE (IG1 TERMINAL VOLTAGE) 
    1. Disconnect the skid control ECU connector.
    2. Turn the ignition switch on (IG).
    3. Measure the voltage according to the value (s) in the table below.

    Voltage 

    VOLTAGE SPECIFICATION

    Tester Connection Condition Specified Condition
    A34-46 (IG1) - Body ground Ignition switch on (IG) 10 to 14 V
    Fig 1: Identifying Terminal IG1 Of A34 Skid Control ECU Connector
    G05001586Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT) 

    OK: Go to next step 

  6. INSPECT SKID CONTROL ECU (GND TERMINAL CONTINUITY) 
    1. Disconnect the skid control ECU connector.
    2. Measure the resistance according to the value (s) in the table below.

    Resistance 

    RESISTANCE SPECIFICATION

    Tester Connection Specified Condition
    A34-32 (GND1) - Body ground Below 1 Ω
    A34-1 (GND2) - Body ground Below 1 Ω
    Fig 2: Identifying Terminal GND2 And GND1 Of A34 Skid Control ECU Connector
    G06128735Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT) 

    OK: Go to next step 

  7. INSPECT COMBINATION METER ASSEMBLY 
    1. Check the combination meter assembly (See HOW TO PROCEED WITH TROUBLESHOOTING ).

    HINT:

    If troubleshooting has been carried out according to the PROBLEM SYMPTOMS TABLE, refer back to the table and proceed to the next step before replacing the part (See PROBLEM SYMPTOMS TABLE ).

    NG: REPLACE COMBINATION METER ASSEMBLY 

    OK: REPLACE ABS & TRACTION ACTUATOR ASSEMBLY 

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