Subaru 2009 IMPREZA Service Manual page 2261

Tire Pressure Warning Light / Trouble Indicator Light Illumination Pattern
TIRE PRESSURE MONITORING SYSTEM (DIAGNOSTICS)
1) When the tire pressure warning light does not il-
luminate in accordance with this illumination pat-
tern, there must be an electrical malfunction.
2) If the tire pressure warning light does not go off,
check the tire pressure monitoring control module/
warning light circuit and the combination meter cir-
cuit. <Ref. to TPM(diag)-22, TIRE PRESSURE
WARNING LIGHT DOES NOT COME OFF, Tire
Pressure Warning Light / Trouble Indicator Light Il-
lumination Pattern.>
NOTE:
If the problem is fixed while driving at approximate-
ly 40 km/h (25 MPH) after the tire pressure warning
light blinks/lights, the warning light goes out and the
tire pressure monitor system operates normally. (If
there is a decrease in tire pressure, or a malfunc-
tion of the system, the malfunction history is dis-
played.)
TPM(diag)-20