Subaru Legacy 2002 Service Manual page 2334

DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
No.
1 CHECK INSTALLATION OF ABSCM&H/U
CONNECTOR.
Turn ignition switch to OFF.
2 CHECK DIAGNOSIS TERMINAL.
Measure resistance between diagnosis termi-
nals (B81) and chassis ground.
Terminals
Diagnosis terminal (A) — Chassis
ground:
Diagnosis terminal (B) — Chassis
ground:
3 CHECK DIAGNOSIS LINE.
1) Turn ignition switch to OFF.
2) Connect diagnosis terminal (B81) to diag-
nosis connector (B82) No. 8.
3) Disconnect connector from ABSCM&H/U.
4) Measure resistance between ABSCM&H/U
connector and chassis ground.
Connector & terminal
(F49) No. 4 — Chassis ground:
4 CHECK GENERATOR.
1) Start the engine.
2) Idle the engine.
3) Measure voltage between generator and
chassis ground.
Terminal
Generator B terminal (+) — Chassis
ground (−):
5 CHECK BATTERY TERMINAL.
Turn ignition switch to OFF.
6 CHECK POWER SUPPLY OF ABSCM.
1) Disconnect connector from ABSCM&H/U.
2) Start engine.
3) Idle the engine.
4) Measure voltage between ABSCM&H/U
connector and chassis ground.
Connector & terminal
(F49) No. 1 (+) — Chassis ground (−):
7 CHECK WIRING HARNESS.
1) Disconnect connector (F45) from connector
(B62).
2) Turn ignition switch to ON.
8 CHECK PROJECTION AT ABSCM&H/U.
1) Turn ignition switch to OFF.
2) Check for broken projection at the
ABSCM&H/U terminal.
9 CHECK ABSCM&H/U.
Measure resistance between ABSCM&H/U
terminals.
Terminal
No. 22 — No. 23:
Step
Is ABSCM&H/U connector
inserted into ABSCM until
the clamp locks onto it?
Is the resistance less than
0.5 Ω?
Is the resistance less than
0.5 Ω?
Is the voltage between 10
and 15 V?
Is there poor contact at
battery terminal?
Is the voltage between 10
and 15 V?
Does the ABS warning light
remain off?
Are the projection broken?
Is the resistance more than
1 MΩ?
ABS-33
Check Yes
Go to step 2.
Go to step 3.
Go to step 4.
Go to step 5.
Repair battery
terminal.
Go to step 7.
Go to step 8.
Go to step 9.
Go to step 10.
ABS (Diagnostics)
No
Insert
ABSCM&H/U con-
nector into
ABSCM&H/U until
the clamp locks
onto it.
Repair diagnosis
terminal harness.
Repair harness
connector
between
ABSCM&H/U and
diagnosis connec-
tor.
Repair generator.
H4 engine model:
<Ref. to SC-13,
Generator.>
H6 engine model:
<Ref. to SC(H6)-
14, Generator.>
Go to step 6.
Repair
ABSCM&H/U
power supply cir-
cuit.
Repair front wiring
harness.
Replace
ABSCM&H/U.
<Ref. to ABS-6,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
Replace
ABSCM&H/U.
<Ref. to ABS-6,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>