Subaru 2002 IMPREZA Service Manual page 2262

DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
ABS (DIAGNOSTICS)
Step
2 CHECK POOR CONTACT IN CONNECTORS. Is there poor contact in con-
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 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 connector.)
4)Turn the ignition switch to ON.
5)Measure the voltage between G sensor con-
nector terminals.
Connector & terminal
(B292) No. 1 (+) — No. 3 ( − − − − ):
6 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:
7 CHECK GROUND SHORT IN G SENSOR
OUTPUT HARNESS.
1)Disconnect the connector from G sensor.
2)Measure the resistance between
ABSCM&H/U connector and chassis ground.
Connector & terminal
LHD: (B301) No. 6 — Chassis ground:
RHD: (F49) No. 6 — Chassis ground:
8 CHECK G SENSOR.
1)Connect the connector to G sensor.
2)Connect the connector to ABSCM&H/U.
3)Turn the ignition switch to ON.
4)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 ( − − − − ):
10 CHECK G SENSOR.
Measure the voltage between G sensor con-
nector terminals.
Connector & terminal
(B292) No. 2 (+) — No. 3 ( − − − − ):
Check
nector between ABSCM&H/U
and G sensor?
Is the same DTC as in the cur-
rent diagnosis still being out-
put?
Are other DTCs being output? Proceed with the
Is the voltage between 4.75
and 5.25 V?
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-164
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/connector
between G sensor
and ABSCM&H/U.
Go to step 8. Repair the har-
ness between G
sensor and
ABSCM&H/U.
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.>
Go to step 11. Replace the G
sensor. <Ref. to
ABS-22, G Sen-
sor.>
No