Subaru LEGACY 2003 Service Manual page 222

DIAGNOSTICS CHART WITH SELECT MONITOR
VDC (DIAGNOSTICS)
6 CHECK OPEN CIRCUIT IN CONTACT POINT
CIRCUIT OF RELAY BOX.
1) Turn ignition switch to OFF.
2) Disconnect connectors (VDC2, F90) from
relay box.
3) Measure resistance between relay box con-
nector unit and motor relay installing por-
tion.
Connector & terminal
(VDC1) No. 1 — (VDC7) No. 30:
Is the measured value less than the speci-
fied value?
7 CHECK OPEN CIRCUIT IN MONITOR SYS-
TEM CIRCUIT OF RELAY BOX.
Measure resistance between relay box con-
nector and motor relay installing point.
Connector & terminal
(VDC4) No. 6 — (VDC7) No. 30:
Is the measured value less than the specified
value?
8 CHECK OPEN CIRCUIT IN CONTROL CIR-
CUIT OF RELAY BOX.
Measure resistance between motor relay
installing point and relay box connector.
Connector & terminal
(VDC4) No. 4 — (VDC7) No. 86:
Is the measured value less than the specified
value?
9 CHECK OPEN CIRCUIT IN CONTROL CIR-
CUIT OF RELAY BOX.
1) Remove valve relay from relay box.
2) Measure resistance between motor relay
installing point and valve relay installing
point.
Connector & terminal
(VDC7) No. 85 — (VDC6) No. 30:
Is the measured value less than the speci-
fied value?
10 CHECK GROUND SHORT IN CIRCUIT OF
RELAY BOX.
Measure resistance between relay box con-
nector and chassis ground.
Connector & terminal
(VDC4) No. 4 — Chassis ground:
(VDC4) No. 6 — Chassis ground:
Does the measured value exceed the specified
value?
11 CHECK BATTERY SHORT IN CIRCUIT OF
RELAY BOX.
Measure voltage between relay box connector
and chassis ground.
Connector & terminal
(VDC4) No. 6 (+) — Chassis ground ( − − − − ):
Is the measured value less than the specified
value?
Step Value
0.5 Ω
0.5 Ω
0.5 Ω
0.5 Ω
1 MΩ
1 V
VDC-220
Yes
Go to step 7. Replace relay box.
Go to step 8. Replace relay box.
Go to step 9. Replace relay box.
Go to step 10. Replace relay box.
Go to step 11. Replace relay box.
Go to step 12. Replace relay box.
No