Subaru IMPREZA GD 2007 Series Manual page 3168

asieps_tobira_IM_US.book 39 ページ ２０１２年１月１７日 火曜日 午後３時４８分
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
9 CHECK BATTERY SHORT OF ABS WHEEL
SPEED SENSOR.
1) Disconnect the ABSCM&H/U connectors.
2) Measure the voltage between ABS wheel
speed sensor and chassis ground.
Terminals
Front RH No. 1 (+) — Chassis ground (–):
Front LH No. 1 (+) — Chassis ground (–):
Rear RH No. 1 (+) — Chassis ground (–):
Rear LH No. 1 (+) — Chassis ground (–):
10 CHECK BATTERY SHORT OF ABS WHEEL
SPEED SENSOR.
1) Turn the ignition switch to ON.
2) Measure the voltage between ABS wheel
speed sensor and chassis ground.
Terminals
Front RH No. 1 (+) — Chassis ground (–):
Front LH No. 1 (+) — Chassis ground (–):
Rear RH No. 1 (+) — Chassis ground (–):
Rear LH No. 1 (+) — Chassis ground (–):
11 CHECK HARNESS CONNECTOR BETWEEN
ABSCM&H/U AND ABS WHEEL SPEED
SENSOR.
1) Turn the ignition switch to OFF.
2) Connect the connector to the ABS wheel
speed sensor.
3) Measure the resistance between
ABSCM&H/U connector terminals.
Connector & terminal
DTC 21
(B301) No. 6 — No. 5:
DTC 23
(B301) No. 1 — No. 16:
DTC 25
(B301) No. 19 — No. 4:
DTC 27
(B301) No. 3 — No. 2:
12 CHECK BATTERY SHORT OF HARNESS.
Measure the voltage between ABSCM&H/U
connector and chassis ground.
Connector & terminal
DTC 21
(B301) No. 6 (+) — Chassis ground (–):
DTC 23
(B301) No. 1 (+) — Chassis ground (–):
DTC 25
(B301) No. 19 (+) — Chassis ground (–):
DTC 27
(B301) No. 3 (+) — Chassis ground (–):
Check
Is the voltage less than 1 V?
Is the voltage less than 1 V?
Is the resistance within the fol-
lowing? Front: 1 — 1.5 kΩ,
Rear: 1.025 — 1.265 kΩ
Is the voltage less than 1 V?
ABS(diag)-39
ABS (DIAGNOSTICS)
Yes No
Go to step 10. Replace the ABS
wheel speed sen-
sor. Front: <Ref. to
ABS-13, Front
ABS Wheel Speed
Sensor.> Rear:
<Ref. to ABS-16,
Rear ABS Wheel
Speed Sensor.>
Go to step 11. Replace the ABS
wheel speed sen-
sor. Front: <Ref. to
ABS-13, Front
ABS Wheel Speed
Sensor.> Rear:
<Ref. to ABS-16,
Rear ABS Wheel
Speed Sensor.>
Go to step 12.
Repair the harness
connector between
ABSCM&H/U and
ABS wheel speed
sensor.
Go to step 13. Repair the harness
between
ABSCM&H/U and
ABS wheel speed
sensor.