Subaru LEGACY 2006 Manual page 4123

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
1 CHECK TIRE PRESSURE MONITORING
CONTROL MODULE.
1) Connect an oscilloscope to the terminal No.
4 of the tire pressure monitoring control mod-
ule connector (R211)
2) Drive the vehicle at 40 km/h (25 MPH) and
check the vehicle speed signal at that time.
2 CHECK HARNESS.
1) Disconnect the combination meter connec-
tor (i10).
2) Connect the tire pressure monitoring con-
trol module connector (R211) and combination
meter connector (i10) and measure the resis-
tance.
TIRE PRESSURE MONITORING SYSTEM (DIAGNOSTICS)
Check
Is the vehicle speed being
input?
Is resistance less than 0.5 Ω? Check the combi-
TPM(diag)-37
Yes No
Replace the tire Go to step 2.
pressure monitor-
ing control module.
<Ref. to WT-11,
Tire Pressure
Monitoring Sys-
tem.>
Repair or replace
nation meter. the open circuit of
<Ref. to IDI-14, the harness.
REMOVAL, Com-
bination Meter.>