Subaru 2009 IMPREZA Service Manual page 2489

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 illuminate.
NOTE:
When pressing the VDC OFF switch for 10 seconds or more, the VDC OFF indicator light goes off and cannot
operate any more. When turning the ignition switch from OFF to ON, the OFF operation enabled status is re-
stored.
Step
1 CHECK OTHER INDICATOR LIGHT.
Turn the ignition switch to ON.
2 CHECK VDCCM.
When the engine does not start, display the cur-
rent data of VDCCM using Subaru Select Mon-
itor.
3 CHECK LAN SYSTEM.
Perform the diagnosis for LAN system. <Ref. to
LAN(diag)-31, OPERATION, Read Diagnostic
Trouble Code (DTC).>
4 CHECK COMBINATION METER.
Check the combination meter. <Ref. to IDI-4,
INSPECTION, Combination Meter System.>
Warning Light Illumination Pattern
Does other indicator light illumi-
nate 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)-27
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Check
Go to step 2.
Go to step 3.
Perform the diag-
nosis according to
DTC for LAN sys-
tem.
Replace the
VDCCM only.
<Ref. to VDC-9,
REPLACEMENT,
VDC Control Mod-
ule and Hydraulic
Control Unit
(VDCCM&H/U).>
Yes No
Perform the self-
diagnosis of com-
bination meter.
Replace the
VDCCM only.
<Ref. to VDC-9,
REPLACEMENT,
VDC Control Mod-
ule and Hydraulic
Control Unit
(VDCCM&H/U).>
Go to step 4.
Replace the com-
bination meter.