Subaru IMPREZA 2002 Service Manual page 363

m
DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
ABS (DIAGNOSTICS)
Step
CHECK OUTPUT OF G SENSOR USING SE-
LECT MONITOR.
1)Select "Current data display & Save" on the
select monitor.
2)Read the G sensor output on the select mon-
itor display.
CHECK POOR CONTACT IN CONNECTORS.
Turn the ignition switch to OFF.
CHECK ABSCM&H/U.
1)Connect all connectors.
2)Erase the memory.
3)Perform the inspection mode.
4)Read out the diagnostic trouble code.
CHECK ANY OTHER DIAGNOSTIC TROU-
BLE CODES APPEARANCE.
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&
HIU.
3)Measure the resistance between
ABSCM&H/U connector terminals.
Connector & terminal
(F49)
NO.
6
-
NO.
28:
,
CHECK GROUND SHORT OF HARNESS.
Measure the resistance between ABSCM&HlU
connector and chassis ground.
Connector & terminal
(F49) No. 28
-
Chassis ground:
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
(6292)
NO.
2 (+)
-
NO. 3 ( - ) :
I
CHECK G SENSOR.
~
Measure the voltage between G sensor con-
nector terminals.
Connector & terminal
(8292) NO. 2 (+)
-
NO.
3
(-):
Check
'or display 2.3k0.2 V when the
:
sensor is in horizontal posi-
ion?
s there poor contact in con-
lector between ABSCM&HlU
ind G sensor?
s the same diagnostic trouble
:ode as in the current diagno-
;is still being output?
\re other diagnostic trouble
:odes being output?
s the resistance between 4.3
ind 4.9 kR?
s the resistance more than 1
m?
s the voltage between 2.1 and
!.5 V when G sensor is hori-
rontal?
s the voltage between 3.7 and
&.I V when G sensor is
nclined forwards to go"?
Repair the con-
nector.
Replace the
ABSCM&H/U.
<Ref. to ABS-7,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
Proceed with the
diagnosis corre-
sponding to the
diagnostic trouble
code.
Go to step 6.
30 to step 7.
30 to step 8.
30 to step 9.
No
30 to
step
6.
30 to step 3.
30 to step 4.
4 temporary poor
:ontact.
3epair harness1
:onnector
3etween G sensor
m d ABSCM&H/U.
Repair harness
Detween G sensor
m d ABSCM&H/U.
aeplace
4BSCM&H/U.
<Ref. to ABS-7,
4BS Control Mod-
ule and Hydraulic
Sontrol Unit
(ABSCM&H/U).
= .
Replace the G
sensor. <Ref. to
ABS-23, G Sen-
sor.>
Replace the G
sensor. <Ref. to
ABS-23, G Sen-
so r. >
ABS-1 77