Subaru 2002 IMPREZA Service Manual page 2140
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- Service manual (4627 pages) ,
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- Service manual (342 pages)
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DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
ABS (DIAGNOSTICS)
Step
1
CHECK ABS SENSOR.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from ABS sensor.
3)Measure the resistance of ABS sensor con-
nector terminals.
Terminal
Front RH No. 1 — No. 2:
Front LH No. 1 — No. 2:
Rear RH No. 1 — No. 2:
Rear LH No. 1 — No. 2:
2
CHECK BATTERY SHORT OF ABS SEN-
SOR.
1)Disconnect the connector from ABSCM&
H/U.
2)Measure the voltage between ABS sensor
and chassis ground.
Terminal
Front RH No. 1 (+) — Chassis ground ( − − − − ):
Front LH No. 1 (+) — Chassis ground ( − − − − ):
Rear RH No. 2 (+) — Chassis ground ( − − − − ):
Rear LH No. 2 (+) — Chassis ground ( − − − − ):
3
CHECK BATTERY SHORT OF ABS SEN-
SOR.
1)Turn the ignition switch to ON.
2)Measure the voltage between ABS sensor
and chassis ground.
Terminal
Front RH No. 1 (+) — Chassis ground ( − − − − ):
Front LH No. 1 (+) — Chassis ground ( − − − − ):
Rear RH No. 2 (+) — Chassis ground ( − − − − ):
Rear LH No. 2 (+) — Chassis ground ( − − − − ):
4
CHECK HARNESS/CONNECTOR BETWEEN
ABSCM&H/U AND ABS SENSOR.
1)Turn the ignition switch to OFF.
2)Connect the connector to ABS sensor.
3)Measure the resistance between
ABSCM&H/U connector terminals.
Connector & terminal
DTC 21 /
LHD: (B301) No. 11 — No. 12:
RHD: (F49) No. 11 — No. 12:
DTC 23 /
LHD: (B301) No. 9 — No. 10:
RHD: (F49) No. 9 — No. 10:
DTC 25 /
LHD: (B301) No. 14 — No. 15:
RHD: (F49) No. 14 — No. 15:
DTC 27 /
LHD: (B301) No. 7 — No. 8:
RHD: (F49) No. 7 — No. 8:
Check
Is the resistance between 1
and 1.5 kΩ?
Is the voltage less than 1 V?
Is the voltage less than 1 V?
Is the resistance between 1
and 1.5 kΩ?
ABS-42
Yes
Go to step 2.
Replace the ABS
sensor. Front:
<Ref. to ABS-14,
Front ABS Sen-
sor.> Rear: <Ref.
to ABS-17, Rear
ABS Sensor.>
Go to step 3.
Replace the ABS
sensor. Front:
<Ref. to ABS-14,
Front ABS Sen-
sor.> Rear: <Ref.
to ABS-17, Rear
ABS Sensor.>
Go to step 4.
Replace the ABS
sensor. Front:
<Ref. to ABS-14,
Front ABS Sen-
sor.> Rear: <Ref.
to ABS-17, Rear
ABS Sensor.>
Go to step 5.
Repair the har-
ness/connector
between
ABSCM&H/U and
ABS sensor.
No
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