Subaru LEGACY 2006 Manual page 4178

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VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
4) When the VDC indicator light, VDC warning light
and VDC OFF indicator light do not go off, check
the combination meter circuit or CAN communica-
tion circuit. <Ref. to VDC(diag)-32, VDC INDICA-
TOR LIGHT DOES NOT GO OFF, Warning Light
Illumination Pattern.>
NOTE:
• Even though the ABS warning light does not go
off after 1.5 seconds from ABS warning light illumi-
nation, the ABS system operates normally when
the warning light goes off while driving at approxi-
mately 12 km/h (7 MPH). However, the ABS sys-
tem does not work while the ABS warning light is
illuminated.
• It may take several minutes before VDC warning
light and VDC OFF indicator light goes off if the ve-
hicle is parked under low temperature for a speci-
fied time. This is not defective because it is resulted
from low engine coolant temperature.
• With the vehicle jack-up/lift-up or set on free roll-
ers, when the wheels lock or spin after starting the
engine, ABS warning light, VDC warning light and
VDC OFF indicator light may illuminate because
VDCCM&H/U detects the abnormal conditions
from ABS wheel speed sensors. In this case, this is
not a malfunction. Perform the Clear Memory
Mode.
B: VDC WARNING LIGHT, VDC OFF INDICATOR LIGHT AND VDC INDICATOR
LIGHT DO NOT COME ON
DETECTING CONDITION:
• Defective combination meter
• Defective CAN communication
TROUBLE SYMPTOM:
When the ignition switch is turned to ON (engine OFF), VDC indicator light, VDC warning light and VDC OFF
indicator light do not come on.
NOTE:
When pressing the VDC OFF switch for more than 10 seconds, the VDC OFF indicator light goes off and can-
not operate any more. When turning the ignition switch from OFF to ON, the OFF operation enabled status
is restored.
Step
1 CHECK OTHER INDICATOR LIGHT.
Turn the ignition switch to ON.
2 CHECK VDCCM.
When the engine does not start, display the
current data of VDCCM using Subaru Select
Monitor.
3 CHECK LAN SYSTEM.
Perform the diagnosis for LAN system. <Ref. to
LAN(diag)-25, OPERATION, Read Diagnostic
Trouble Code (DTC).>
4 CHECK COMBINATION METER.
Check the combination meter.
Warning Light Illumination Pattern
Does other indicator light illu-
minate soon after "ON".
Is "VDC warning light" output
set to "ON"?
Is there any fault in LAN sys-
tem?
Is combination meter OK?
VDC(diag)-28
Check Yes
Go to step 2.
Go to step 3.
Perform the diag-
nosis according to
DTC for LAN sys-
tem.
Replace the
VDCCM&H/U.
No
Perform the self-
diagnosis of com-
bination meter.
Replace the
VDCCM&H/U.
Go to step 4.
Repair the combi-
nation meter
assembly.