Subaru 2002 IMPREZA Service Manual page 2271

DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
Step
2 CHECK POOR CONTACT IN CONNECTORS.
Turn the ignition switch to OFF.
3 CHECK ABSCM&H/U.
1)Connect all connectors.
2)Erase the memory.
3)Perform the inspection mode.
4)Read out the DTC.
4 CHECK ANY OTHER DIAGNOSTIC TROU-
BLE CODES (DTCs) APPEARANCE.
5 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:
6 CHECK GROUND SHORT OF HARNESS.
Measure the resistance between ABSCM&H/U
connector and chassis ground.
Connector & terminal
LHD: (B301) No. 28 — Chassis ground:
RHD: (F49) No. 28 — Chassis ground:
7 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 ( − − − − ):
8 CHECK G SENSOR.
Measure the voltage between G sensor con-
nector terminals.
Connector & terminal
(B292) No. 2 (+) — No. 3 ( − − − − ):
9 CHECK G SENSOR.
Measure the voltage between G sensor con-
nector terminals.
Connector & terminal
(B292) No. 2 (+) — No. 3 ( − − − − ):
Check
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 resistance more than 1
MΩ?
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°?
Is the voltage between 0.5 and
0.9 V when G sensor is
inclined backwards to 90°?
ABS-173
ABS (DIAGNOSTICS)
Yes
Repair the con- Go to step 3.
nector.
Replace the Go to step 4.
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 6. Repair the har-
ness/connector
between G sensor
and ABSCM&H/U.
Go to step 7. Repair the har-
ness between G
sensor and
ABSCM&H/U.
Replace the
ABSCM&H/U.
<Ref. to ABS-7,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
Go to step 8. Replace the G
sensor. <Ref. to
ABS-22, G Sen-
sor.>
Go to step 9. Replace the G
sensor. <Ref. to
ABS-22, G Sen-
sor.>
Go to step 10. Replace the G
sensor. <Ref. to
ABS-22, G Sen-
sor.>
No