Subaru 2002 IMPREZA Service Manual page 2275

DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
Step
2 CHECK OUTPUT OF G SENSOR USING SE-
LECT MONITOR.
1)Select "Current data display & Save" on the
select monitor.
2)Read the select monitor display.
3 CHECK OUTPUT OF G SENSOR USING SE-
LECT MONITOR.
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)Select "Current data display & Save" on the
select monitor.
6)Read the select monitor display.
4 CHECK OUTPUT OF G SENSOR USING SE-
LECT MONITOR.
Read the select monitor display.
5 CHECK POOR CONTACT IN CONNECTORS.
Turn the ignition switch to OFF.
6 CHECK ABSCM&H/U.
1)Connect all connectors.
2)Erase the memory.
3)Perform the inspection mode.
4)Read out the DTC.
7 CHECK ANY OTHER DIAGNOSTIC TROU-
BLE CODES (DTCs) APPEARANCE.
8 CHECK OPEN CIRCUIT IN G SENSOR OUT-
PUT HARNESS AND GROUND HARNESS.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from ABSCM&
H/U.
3)Measure the resistance between
ABSCM&H/U connector terminals.
Connector & terminal
LHD: (B301) No. 6 — No. 28:
RHD: (F49) No. 6 — No. 28:
9 CHECK G SENSOR.
1)Remove the console box.
2)Remove the G sensor from vehicle.
3)Connect the connector to G sensor.
4)Connect the connector to ABSCM&H/U.
5)Turn the ignition switch to ON.
6)Measure the voltage between G sensor con-
nector terminals.
Connector & terminal
(B292) No. 2 (+) — No. 3 ( − − − − ):
10 CHECK G SENSOR.
Measure the voltage between G sensor con-
nector terminals.
Connector & terminal
(B292) No. 2 (+) — No. 3 ( − − − − ):
Check
Is the G sensor output on mon-
itor display between 2.1 and
2.5 V when the vehicle is in
horizontal position?
Is the G sensor output on mon-
itor display between 3.7 and
4.1 V when G sensor is
inclined forwards to 90°?
Is the G sensor output on the
monitor display between 0.5
and 0.9 V when G sensor is
inclined backwards to 90°?
Is there poor contact in con-
nector between ABSCM&H/U
and G sensor?
Is the same DTC as in current
diagnosis still being output?
Are other DTCs being output? Proceed with the
Is the resistance between 5.0
and 5.6 kΩ?
Is the voltage between 2.1 and
2.5 V when G sensor is hori-
zontal?
Is the voltage between 3.7 and
4.1 V when G sensor is
inclined forwards to 90°?
ABS-177
ABS (DIAGNOSTICS)
Yes
Go to step 3. Go to step 8.
Go to step 4. Replace the G
sensor. <Ref. to
ABS-22, G Sen-
sor.>
Go to step 5. Replace the G
sensor. <Ref. to
ABS-22, G Sen-
sor.>
Repair the con- Go to step 6.
nector.
Replace the Go to step 7.
ABSCM&H/U.
<Ref. to ABS-7,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
A temporary poor
diagnosis corre- contact.
sponding to DTC.
Go to step 9. Repair the har-
ness/connector
between G sensor
and ABSCM&H/U.
Go to step 10. Replace the G
sensor. <Ref. to
ABS-22, G Sen-
sor.>
Go to step 11. Replace the G
sensor. <Ref. to
ABS-22, G Sen-
sor.>
No