Subaru IMPREZA 2002 Service Manual page 349

DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
ABS
(
D I AG NOSTl CS)
Step
I
CHECK OUTPUT OF STOP LIGHT SWITCH
USING SELECT MONITOR.
1)Select "Current data display & Save" on the
select monitor.
2)Release the brake pedal.
3)Read the stop light switch output in the
select monitor data display.
CHECK OUTPUT OF STOP LIGHT SWITCH
USING SELECT MONITOR.
1)Depress the brake pedal.
2)Read the stop light switch output in the
select monitor data display.
CHECK IF STOP LIGHTS COME ON.
Depress the brake pedal.
CHECK OPEN CIRCUIT IN HARNESS.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from ABSCM&
H/U.
3)Depress the brake pedal.
4)Measure the voltage between ABSCM&H/U
2
3
I
.connector and chassis ground.
Connector & terminal
(F49) No. 2
-
Chassis ground:
5 CHECK POOR CONTACT IN CONNECTORS
5 CHECK ABSCM&HRI.
1)Connect all connectors.
2)Erase the memory.
3)Perform the inspection mode.
4)Read out the diagnostic trouble code.
r
CHECK ANY OTHER DIAGNOSTIC TROU-
BLE CODES APPEARANCE.
Check
Is
the reading indicated on
monitor display less than 1.5
V?
Is
the reading indicated on
monitor display between 10
and 15 V?
Do stop lights turn on?
Is the voltage between 10 and
15 V?
Is there poor contact in con-
nector between stop light
switch and ABSCM&H/U?
Is the same diagnostic trouble
code as in the current diagno-
sis still being output?
Are other diagnostic trouble
codes being output?
Yes
Go to step 2.
Go to step 5.
Go to step 4.
Go to step 5.
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.
No
30 to step
3.
30 to step
3 .
3epair the stop
ights circuit.
3epair harness
Detween stop light
switch and
4BSCM&H/U con-
lector.
30 to step 6.
30 to step 7.
4 temporary poor
:ontact.
ABS-1 63