Subaru IMPREZA 2002 Service Manual page 277

9
DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
ABS (DIAGNOSTICS)
Step
CHECK ALL FOUR WHEELS FOR FREE
TURNING.
CHECK SPECIFICATIONS OF ABSCM&H/U.
Check specifications of the mark to the
ABSCM&H/U.
CC: AT
CD: MT
CHECK INPUT VOLTAGE OF G SENSOR.
1)Turn the ignition switch to OFF.
2)Remove the console box.
3)Disconnect the G sensor from body. (Do not
disconnect the connector.)
4)Turn the ignition switch to ON.
5)Measure the voltage between G sensor con-
nector terminals.
Connector & terminal
(6292)
NO. 1 (+)
-
NO.
3 (-):
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
(F49) NO. 6
-
NO. 28:
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
(F49) No. 6
-
Chassis ground:
CHECK BATTERY SHORT OF HARNESS.
Measure the voltage between ABSCM&H/U
connector and chassis ground.
Connector & terminal
(F49) No. 6 (+)
-
Chassis ground (-):
CHECK BATTERY SHORT OF HARNESS.
1)Turn the ignition switch to ON.
2)Measure the voltage between ABSCM&H/U
connector and chassis ground.
Connector & terminal
(F49) No. 6 (+)
-
Chassis ground ( - ) :
Check
iave the wheels been turned
reely such as when the vehicle
s lifted up, or operated on a
,oiling road?
Ioes the vehicle specification
2nd the ABSCM&H/U specifi-
:ation match?
IS the voltage between 4.75
and 5.25 V?
Is the resistance between 4.3
and 4.9 kR?
Is the resistance more than 1
MR?
Is the voltage less than 1 V?
Is the voltage less than
1 V?
Yes
-he ABS is nor-
nal. Erase the
liagnostic trouble
:ode.
3eplace the
4BSCM&H/U.
:Ref. to ABS-7,
4BS Control Mod-
ile and Hydraulic
2ontrol Unit
ABSCM&H/U).>
2AUTION:
3e sure to turn ig-
iition switch to
3FF when remov-
ng ABSCM&H/U.
30 to step 4.
30 to step 5.
Go to step 6.
Go to step 7.
Go to step 8.
~
No
20 to step 2.
30 to step
3 .
Repair harness/
:onnector
Detween G senso
and ABSCM&H/U
Repair harness/
connector
between G senso
and ABSCM&H/U
Repair harness
between G sensor
and ABSCM&H/U.
Repair harness
between G sensor
and ABSCM&H/U.
Repair harness
between G sensor
and ABSCM&H/U.
ABS-91