Subaru Legacy 2003 Service Manual page 3084

DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
Step
13 CHECK BATTERY SHORT IN CIRCUIT OF
RELAY BOX.
1) Turn ignition switch to ON.
2) Measure voltage between relay box con-
nector and chassis ground.
Connector & terminal
(VDC4) No. 4 (+) — Chassis ground ( − − − − ):
(VDC4) No. 6 (+) — Chassis ground ( − − − − ):
Is the measured value less than the speci-
fied value?
14 CHECK OPEN CIRCUIT IN RELAY CON-
TROL SYSTEM HARNESS.
1) Turn ignition switch to OFF.
2) Measure resistance between VDCCM con-
nector and relay box connector.
Connector & terminal
(F87) No. 22 — (F90) No. 4:
(F87) No. 10 — (F90) No. 6:
Is the measured value less than the speci-
fied value?
15 CHECK GROUND SHORT IN HARNESS BE-
TWEEN RELAY BOX AND VDCCM.
Measure resistance between VDCCM connec-
tor and chassis ground.
Connector & terminal
(F87) No. 22 — Chassis ground:
(F87) No. 10 — Chassis ground:
Does the measured value exceed the specified
value?
16 CHECK BATTERY SHORT IN HARNESS BE-
TWEEN RELAY BOX AND VDCCM.
Measure voltage between VDCCM connector
and chassis ground.
Connector & terminal
(F87) No. 22 (+) — Chassis ground ( − − − − ):
(F87) No. 10 (+) — Chassis ground ( − − − − ):
Is the measured value less than the specified
value?
17 CHECK BATTERY SHORT IN HARNESS BE-
TWEEN RELAY BOX AND VDCCM.
1) Turn ignition switch to ON.
2) Measure voltage between VDCCM connec-
tor and chassis ground.
Connector & terminal
(F87) No. 22 (+) — Chassis ground ( − − − − ):
(F87) No. 10 (+) — Chassis ground ( − − − − ):
Is the measured value less than the speci-
fied value?
18 CHECK CONDITION OF MOTOR GROUND.
Tightening torque:
33 ± ± ± ± 10 N·m (3.3 ± ± ± ± 1.0 kgf-m, 24 ± ± ± ± 7 ft-lb)
Is the motor ground terminal tightly clamped?
Value
1 V
0.5 Ω
1 MΩ
1 V
1 V
Clamped securely.
VDC-111
VDC (DIAGNOSTICS)
Yes
Go to step 14. Replace relay box.
Go to step 15. Repair harness
connector
between VDCCM
and relay box.
Go to step 16. Repair harness
between VDCCM
and relay box.
Check fuse SBF
holder.
Go to step 17. Repair harness
between VDCCM
and relay box.
Check fuse SBF
holder.
Go to step 18. Repair harness
between VDCCM
and relay box.
Check fuse SBF
holder.
Go to step 19. Tighten the clamp
of motor ground
terminal.
No