Subaru IMPREZA 2002 Service Manual page 301

DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
ABS /DIAGNOSTICS)
Step
7 CHECK HARNESS/CONNECTOR BETWEEN
ABSCM&H/U AND ABS SENSOR.
1)Connect the connector to ABS sensor.
2)Disconnect the connector from ABSCM&
H/U.
3)Measure the resistance at ABSCM&H/U
connector terminals.
Connector & terminal
DTC 22/(F49) NO. 11
-
NO. 12:
DTC 24 / (F49) No. 9
-
No. 10:
DTC 26 / (F49) NO. 14
-
NO. 15:
DTC 28 / (F49) NO. 7
-
NO. 8:
8
CHECK GROUND SHORT OF HARNESS.
Measure the resistance between ABSCM&H/U
connector and chassis ground.
Connector & terminal
DTC 22 / (F49) No. 11
-
Chassis ground:
DTC 24 / (F49) No. 9
-
Chassis ground:
DTC 26 / (F49) No. 14
-
Chassis ground:
DTC 28 / (F49) No. 7
-
Chassis ground:
CHECK GROUND CIRCUIT OF ABSCM&H/U.
Measure the resistance between ABSCM&H/U
And chassis ground.
9
Connector & terminal
(F49) NO. 23
-
GND:
0
CHECK POOR CONTACT IN CONNECTORS.
1
CHECK SOURCES OF SIGNAL NOISE.
2
CHECK SOURCES OF SIGNAL NOISE.
1 3 CHECK SHIELD CIRCUIT.
1)Connect all connectors.
2)Measure the resistance between shield con-
nector and chassis ground.
Connector & terminal
DTC 26 / (6200) No. 11
-
Chassis
ground:
DTC 28 / (8200) No. 3
-
Chassis ground:
NOTE:
For
the DTC 22 and 24:
Go to step 24.
!4 CHECK ABSCM&HN.
1)Connect all connectors.
2)Erase the memory.
3)Perform the inspection mode.
4)Read out the diagnostic trouble code.
1 5
CHECK ANY OTHER DIAGNOSTIC TROU-
BLE CODES APPEARANCE.
Check
s the resistance between 1
3nd 1.5
kR?
s the resistance more than 1
WR?
Is the resistance less than 0.5
D?
Is there poor contact in con-
nectors between ABSCM&H/U
and ABS sensor?
Is the car telephone or the
vvireless transmitter properly
installed?
Are noise sources (such as an
antenna) installed near the
sensor harness?
Is the resistance less than 0.5
n?
Is the same diagnostic trouble
code as in the current diagno-
sis still being output?
Are other diagnostic trouble
codes being output?
Yes
io to step 18.
io to step 19.
i o to step 20.
iepair the con-
lector.
i o to step 22.
istall the noise
ources apart from
l e sensor har-
less.
i o to
step 24.
ieplace the
\BSCM&H/U.
:Ref. to ABS-7,
IBS Control Mod-
ile and Hydraulic
:ontrol Unit
ABSCM&H/U) .>
'roceed with the
liagnosis corre-
,pending to the
liagnostic trouble
:ode.
No
iepair harness/
onnector
letween
rBSCM&H/U and
rBS sensor.
iepair harness/
onnector
letween
rBSCM&H/U and
iBS sensor.
iepair the
\BSCM&H/U
iround harness.
io
to step 21.
'roperly install the
:ar telephone or
he wireless trans-
nitter.
$0
to step 23.
3epair the shield
tarness.
20 to step 25.
4
temporary noise
nterference.
ABS-I 15