Subaru IMPREZA GD 2007 Series Manual page 3203

asieps_tobira_IM_US.book 74 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)
ABS (DIAGNOSTICS)
Step
1 WHETHER A WHEEL TURNED FREELY OR
NOT.
2 CHECK OUTPUT OF G SENSOR USING
SUBARU SELECT MONITOR.
1) Select {Current Data Display & Save} in the
Subaru Select Monitor.
2) Read the G sensor output on Subaru Select
Monitor.
3 CHECK POOR CONTACT OF CONNECTOR. Is there poor contact in connec-
4 CHECK ABSCM&H/U.
1) Connect all connectors.
2) Erase the memory.
3) Perform the Inspection Mode.
4) Read the DTC.
5 CHECK OTHER DTC DETECTION.
6 CHECK INPUT VOLTAGE OF G SENSOR.
1) Turn the ignition switch to OFF.
2) Remove the console box.
3) Remove the G sensor from vehicle. (Do not
disconnect the connector.)
4) Turn the ignition switch to ON.
5) Measure the voltage between G sensor
connector terminals.
Connector & terminal
(B292) No. 1 (+) — No. 3 (–):
7 CHECK OPEN CIRCUIT IN G SENSOR OUT-
PUT HARNESS AND GROUND HARNESS.
1) Turn the ignition switch to OFF.
2) Disconnect the ABSCM&H/U connectors.
3) Measure the resistance between
ABSCM&H/U connector terminals.
Connector & terminal
(B301) No. 21 — No. 10:
8 CHECK GROUND SHORT IN G SENSOR
OUTPUT HARNESS.
1) Disconnect the connector from G sensor.
2) Measure the resistance between the
ABSCM&H/U connector and chassis ground.
Connector & terminal
(B301) No. 21 — Chassis ground:
Check
Have the wheels spun free of
load when the vehicle is lifted
up, or during driving on a rough
road?
Is the reading indicated on dis-
play –1.2 — 1.2 m/s when the G
sensor is horizontal?
tors between ABSCM&H/U and
G sensor?
Is the same DTC still output?
Is there any other DTC
detected?
Is the voltage 4.75 — 5.25 V?
Is the resistance 3.6 — 3.8 kΩ? Go to step 8.
Is the resistance 1 MΩ or
more?
ABS(diag)-74
Yes No
ABS is normal. Go to step 2.
Erase the memory.
Go to step 3. Go to step 6.
Go to step 4.
Repair the connec-
tor.
Replace the Go to step 5.
ABSCM only. <Ref.
to ABS-7,
REPLACEMENT,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
Check DTC using Temporary poor
"List of Diagnostic contact occurs.
Trouble Code
(DTC)". <Ref. to
ABS(diag)-34, List
of Diagnostic Trou-
ble Code (DTC).>
Go to step 7.
Repair the harness
connector between
the G sensor and
ABSCM&H/U.
Repair the harness
connector between
the G sensor and
ABSCM&H/U.
Go to step 9. Repair the harness
connector between
the G sensor and
ABSCM&H/U.