Subaru Legacy 2003 - Page 41

VDC-39
VDC (DIAGNOSTICS)
DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
Step Value Yes No
1 CHECK INSTALLATION OF VDCCM CON-
NECTOR.
Turn ignition switch to OFF.
Is VDCCM connector inserted into VDCCM
until the clamp locks onto it?
VDCCM connector is con-
nected and the clamp is
locked.
Go to step 2. Insert VDCCM
connector into
VDCCM until the
clamp locks onto
it.
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:
Is the measured value less than the specified
value?
0.5 Ω Go to step 3. Repair diagnosis
terminal harness.
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 VDCCM.
4) Measure resistance between VDCCM con-
nector and chassis ground.
Connector & terminal
(F87) No. 13 — Chassis ground:
Is the measured value less than the speci-
fied value?
0.5 Ω Go to step 4. Repair harness
connector
between VDCCM
and diagnosis con-
nector.
4 CHECK WIRING HARNESS.
1) Place a sheet of thick paper [thickness 1.5
mm (0.059 in)] in switch area of VDCCM
connector.
2) Turn ignition switch to ON.
Do the ABS warning light and VDC warning
light remain off?
Warning lights remain off. Go to step 5. Repair front wiring
harness.
5 CHECK VDCCM TERMINAL.
1) Turn ignition switch to OFF.
2) Check, if there is any faulty condition of
VDCCM terminal.
Is there any faulty condition of VDCCM ter-
minal?
There is no problem. Go to step 6. Replace VDCCM.
<Ref. to VDC-8,
VDC Control Mod-
ule (VDCCM).>
6 CHECK POWER SUPPLY OF VDCCM.
1) Disconnect connector from VDCCM.
2) Start engine.
3) Idle the engine.
4) Measure voltage between VDCCM connec-
tor and chassis ground.
Connector & terminal
(F87) No. 28 (+) — Chassis ground (
−
−−
−
):
Is the measured value within the specified
range?
10 — 15 V Go to step 7. Repair VDCCM
power supply cir-
cuit.
7 CHECK POOR CONTACT IN VDCCM CON-
NECTOR.
Is there poor contact in VDCCM connector?
There is poor contact. Repair connector. Replace VDCCM.
<Ref. to VDC-8,
VDC Control Mod-
ule (VDCCM).>