Subaru 2009 IMPREZA Service Manual page 2266

Tire Pressure Warning Light / Trouble Indicator Light Illumination Pattern
Step
1 CHECK DTC.
Connect the Subaru Select Monitor, and read
the Diagnostic Trouble Code. <Ref. to
TPM(diag)-8, READ DIAGNOSTIC TROUBLE
CODE (DTC), OPERATION, Subaru Select
Monitor.>
2 CHECK HARNESS.
1) Connect the Subaru Select Monitor to the
terminal No. 2 of the tire pressure monitoring
control module connector (R211).
Connector & terminal
(R211) No. 2 (+) — Chassis ground (–):
2) Turn the ignition switch to ON, and select
"Oscilloscope" from the Main Menu of Subaru
Select Monitor.
3) Check the voltage displayed.
3 CHECK HARNESS.
1) Check the output waveform displayed in the
oscilloscope of Subaru Select Monitor.
High
Low
4 CHECK HARNESS.
1) Disconnect the tire pressure monitoring
control module connector.
2) Connect the Subaru Select Monitor to the
terminal No. 2 of the tire pressure monitoring
control module connector (R211).
Connector & terminal
(R211) No. 2 (+) — Chassis ground (–):
3) Turn the ignition switch to ON, and select
"Oscilloscope" from the Main Menu of Subaru
Select Monitor.
4) Check the voltage displayed.
Is diagnostics code (DTC) dis-
played?
Is the voltage 10 V or more?
Is the pattern the same output
waveform as shown in the fig-
ure?
(1) 400 20 ms Duty 50 %
High: Battery voltage
Low:1.5 V or less
(1)
TPM00044
Is the voltage 10 V or more?
TPM(diag)-25
TIRE PRESSURE MONITORING SYSTEM (DIAGNOSTICS)
Check Yes No
Perform the diag- Go to step 2.
nosis according to
the DTC. <Ref. to
TPM(diag)-26, List
of Diagnostic Trou-
ble Code (DTC).>
Go to step 3. Go to step 4.
Check the combi- Replace the tire
nation meter. <Ref. pressure monitor-
to IDI-4, INSPEC- ing control module.
TION, Combina- <Ref. to WT-13,
tion Meter REMOVAL, Tire
System.> Pressure Monitor-
ing System.>
Replace the tire The harness
pressure monitor- between the com-
ing control module. bination meter
<Ref. to WT-13, connector and the
REMOVAL, Tire tire pressure moni-
Pressure Monitor- toring control mod-
ing System.> ule connector is
shorted or open.
Repair or replace
the harness.