Subaru Legacy IV (2008 year). Manual — part 909

    ABS(diag)-35

    Diagnostic Procedure with Diagnostic Trouble Code (DTC)

    ABS (DIAGNOSTICS)

    H: DTC C0108 FRONT ABS WHEEL SPEED SENSOR LH MALFUNCTION (ABS

    WHEEL SPEED SENSOR ABNORMAL SIGNAL)

    DTC DETECTING CONDITION:
    • Defective ABS wheel speed sensor signal (noise, abnormal signal, etc.)
    • Defective harness connector
    TROUBLE SYMPTOM:
    ABS does not operate.
    WIRING DIAGRAM:

    4

    3

    1

    16

    17

    2

    15

    B98

    R72

    R2

    E

    1

    2

    15

    14

    6

    5

    R73

    1

    2

    B6

    B15

    R73

    R72

    1

    2

    1 2

    2 1

    6

    5

    B301

    2

    1

    B15

    B6

    B301

    B98

    1 2 3 4 5 6 7 8 9 10 11

    16 17 18 19 20 21 22 23 24 25 26

    13

    12

    15

    14

    ABSCM & H/U

    ABS00995

    1 2 3

    4 5 6 7

    8 9 10 11 12 13 14 15 16

    TWISTED P

    AIR LINE

    TWISTED P

    AIR LINE

    TWISTED P

    AIR LINE

    TWISTED P

    AIR LINE

    TWISTED P

    AIR LINE

    TWISTED P

    AIR LINE

    FRONT ABS

    WHEEL SPEED

    SENSOR LH

    FRONT ABS

    WHEEL SPEED

    SENSOR RH

    REAR ABS

    WHEEL SPEED

    SENSOR LH

    REAR ABS

    WHEEL SPEED

    SENSOR RH

    ABS(diag)-36

    Diagnostic Procedure with Diagnostic Trouble Code (DTC)

    ABS (DIAGNOSTICS)

    Step

    Check

    Yes

    No

    1

    CHECK OUTPUT OF ABS WHEEL SPEED
    SENSOR USING SUBARU SELECT MONI-
    TOR.
    1) Select {Current Data Display & Save} in the
    Subaru Select Monitor.
    2) Read the output of the faulty ABS wheel
    speed sensor.

    Does the speed indicated on
    the display change in response
    to the speedometer reading
    during acceleration/decelera-
    tion when the steering wheel is
    in the straight-ahead position?

    Go to step 2.

    Go to step 7.

    2

    CHECK POOR CONTACT IN CONNECTOR.
    Turn the ignition switch to OFF.

    Is there poor contact in connec-
    tors between ABSCM&H/U and
    ABS wheel speed sensor?

    Repair the connec-
    tor.

    Go to step 3.

    3

    CHECK CAUSE OF SIGNAL NOISE.
    Make sure the radio wave devices and elec-
    tronic components are installed correctly.

    Are the radio wave devices and
    electronic components
    installed correctly?

    Go to step 4.

    Install the radio
    wave devices and
    electronic compo-
    nents properly.

    4

    CHECK CAUSE OF SIGNAL NOISE.
    Check if the noise sources (such as an
    antenna) are installed near the sensor harness.

    Are noise sources installed?

    Install the noise
    sources apart from
    sensor harness.

    Go to step 5.

    5

    CHECK ABSCM&H/U.
    1) Connect all connectors.
    2) Clear the memory. <Ref. to ABS(diag)-20,
    Clear Memory Mode.>
    3) Perform the Inspection Mode. <Ref. to
    ABS(diag)-19, Inspection Mode.>
    4) Read the DTC.

    Is the same DTC displayed?

    Replace the
    ABSCM only. <Ref.
    to ABS-8,
    REPLACEMENT,
    ABS Control Mod-
    ule and Hydraulic
    Control Unit
    (ABSCM&H/U).>

    Go to step 6.

    6

    CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed?

    Check DTC using
    “List of Diagnostic
    Trouble Code
    (DTC)”. <Ref. to
    ABS(diag)-29, List
    of Diagnostic Trou-
    ble Code (DTC).>

    It results from a
    temporary noise
    interference.

    7

    CHECK INSTALLATION OF ABS WHEEL
    SPEED SENSOR.

    Is the ABS wheel speed sensor
    installation bolt tightened 7.5
    N·m (0.76 kgf-m, 5.5 ft-lb)?

    Go to step 8.

    Tighten the ABS
    wheel speed sen-
    sor installation
    bolts.

    8

    CHECK ABS WHEEL SPEED SENSOR SIG-
    NAL.
    1) Install the ABS wheel speed sensor.
    2) Prepare an oscilloscope.
    3) Check the ABS wheel speed sensor. <Ref.
    to ABS-14, ABS WHEEL SPEED SENSOR,
    INSPECTION, Front ABS Wheel Speed Sen-
    sor.>

    Does the oscilloscope indicate
    the waveform pattern like
    shown in the figure when the
    tire is slowly turned? Does the
    oscilloscope indication repeat
    the waveform pattern like
    shown in the figure when the
    tire is slowly turned in equal
    speed for one rotation or more?

    Go to step 10.

    Go to step 9.

    9

    CHECK ABS WHEEL SPEED SENSOR OR
    MAGNETIC ENCODER.

    Are there foreign matter, break-
    age or damage at the tip of ABS
    wheel speed sensor or mag-
    netic encoder?

    Remove dirt thor-
    oughly. Also
    replace the ABS
    wheel speed sen-
    sor or magnetic
    encoder as a unit
    with hub unit bear-
    ing if it is broken or
    damaged.

    Go to step 10.

    10

    CHECK CAUSE OF SIGNAL NOISE.
    Make sure the radio wave devices and elec-
    tronic components are installed correctly.

    Are the radio wave devices and
    electronic components
    installed correctly?

    Go to step 11.

    Install the radio
    wave devices and
    electronic compo-
    nents properly.

    ABS(diag)-37

    Diagnostic Procedure with Diagnostic Trouble Code (DTC)

    ABS (DIAGNOSTICS)

    11

    CHECK CAUSE OF SIGNAL NOISE.
    Check if the noise sources (such as an
    antenna) are installed near the sensor harness.

    Is the noise sources installed? Go to step 12.

    Install the noise
    sources apart from
    sensor harness.

    12

    CHECK ABSCM&H/U.
    1) Connect all connectors.
    2) Clear the memory. <Ref. to ABS(diag)-20,
    Clear Memory Mode.>
    3) Perform the Inspection Mode. <Ref. to
    ABS(diag)-19, Inspection Mode.>
    4) Read the DTC.

    Is the same DTC displayed?

    Replace the
    ABSCM only. <Ref.
    to ABS-8,
    REPLACEMENT,
    ABS Control Mod-
    ule and Hydraulic
    Control Unit
    (ABSCM&H/U).>

    Go to step 13.

    13

    CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed?

    Check DTC using
    “List of Diagnostic
    Trouble Code
    (DTC)”. <Ref. to
    ABS(diag)-29, List
    of Diagnostic Trou-
    ble Code (DTC).>

    It results from a
    temporary noise
    interference.

    NOTE:
    Though the ABS
    warning light re-
    mains on at this
    time, this is normal.
    Drive the vehicle at
    12 km/h (7 MPH)
    or more in order to
    turn ABS warning
    light off. Be sure to
    drive the vehicle
    and check that the
    warning light goes
    off.

    Step

    Check

    Yes

    No

    ABS(diag)-38

    Diagnostic Procedure with Diagnostic Trouble Code (DTC)

    ABS (DIAGNOSTICS)

    I:

    DTC C0115 ABS WHEEL SPEED SENSOR SIGNAL MALFUNCTION IN ONE
    OF FOUR WHEELS

    DTC DETECTING CONDITION:
    • Defective ABS wheel speed sensor signal (noise, abnormal signal, etc.)
    • Defective magnetic encoder
    • When a wheel is turned freely for a long time
    TROUBLE SYMPTOM:
    • ABS does not operate.
    • EBD does not operate.

    NOTE:
    Brake warning light illuminates as well as the ABS warning light.
    WIRING DIAGRAM:

    4

    3

    1

    16

    17

    2

    15

    B98

    R72

    R2

    E

    1

    2

    15

    14

    6

    5

    R73

    1

    2

    B6

    B15

    R73

    R72

    1

    2

    1 2

    2 1

    6

    5

    B301

    2

    1

    B15

    B6

    B301

    B98

    1 2 3 4 5 6 7 8 9 10 11

    16 17 18 19 20 21 22 23 24 25 26

    13

    12

    15

    14

    ABSCM & H/U

    ABS00995

    1 2 3

    4 5 6 7

    8 9 10 11 12 13 14 15 16

    TWISTED P

    AIR LINE

    TWISTED P

    AIR LINE

    TWISTED P

    AIR LINE

    TWISTED P

    AIR LINE

    TWISTED P

    AIR LINE

    TWISTED P

    AIR LINE

    FRONT ABS

    WHEEL SPEED

    SENSOR LH

    FRONT ABS

    WHEEL SPEED

    SENSOR RH

    REAR ABS

    WHEEL SPEED

    SENSOR LH

    REAR ABS

    WHEEL SPEED

    SENSOR RH

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    Текст

    Матвей Александрович28.05.2024 20:15
    Политика конфиденциальности