Subaru Legacy 2002 Service Manual page 2442

DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
No.
1 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.
2 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.
3 CHECK IF STOP LIGHTS COME ON.
Depress the brake pedal.
4 CHECK OPEN CIRCUIT IN HARNESS.
1) Turn ignition switch to OFF.
2) Disconnect connector from ABSCM&H/U.
3) Depress brake pedal.
4) Measure voltage between ABSCM&H/U
connector and chassis ground.
Connector & terminal
(F49) No. 2 — Chassis ground:
5 CHECK POOR CONTACT IN CONNEC-
TORS.
6 CHECK ABSCM&H/U.
1) Connect all connectors.
2) Erase the memory.
3) Perform inspection mode.
4) Read out the DTC.
7 CHECK ANY OTHER DTC APPEARANCE.
Step
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
connector between stop
light switch and
ABSCM&H/U?
Is the same DTC as in the
current diagnosis still being
output?
Are other DTC being out-
put?
ABS-141
Check Yes
Go to step 2.
Go to step 5.
Go to step 4.
Go to step 5.
Repair connector.
Replace
ABSCM&H/U.
<Ref. to ABS-6,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
Proceed with the
diagnosis corre-
sponding to the
DTC.
ABS (Diagnostics)
No
Go to step 3.
Go to step 3.
Repair stop lights
circuit.
Repair harness
between stop light
switch and
ABSCM&H/U con-
nector.
Go to step 6.
Go to step 7.
A temporary poor
contact.