Subaru Legacy IV (2008 year). Manual - part 859

 

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Subaru Legacy IV (2008 year). Manual - part 859

 

 

TPM(diag)-22

Tire Pressure Warning Light / Trouble Indicator Light Illumination Pattern

TIRE PRESSURE MONITORING SYSTEM (DIAGNOSTICS)

C: TIRE PRESSURE WARNING LIGHT DOES NOT COME OFF

DETECTING CONDITION:
• Defective combination meter
• Tires pressure drop
• Transmitter ID not registered
TROUBLE SYMPTOM:
Tire pressure warning light remains illuminating after engine starts.
WIRING DIAGRAM:

FB-36

F/B FUSE NO.5

(IG)

2

6

A:

i10

B:

i11

A3

B6

FB-17

F/B FUSE NO. 7

 (B)

i102

R167

R211

FB-48

F/B FUSE NO. 4

 (IG)

16

5

9

1 2 3

4 5 6

7 8 9 10 11 12 13 14

B:

i11

i102

1 2 3
8 9 10

4

11 12 13 14 15 16

5 6 7

A:

i10

1 2 3 4 5

6 7 8 9 10

11 12

19 20 21

13 14 15 16

17 18

22

R211

1 2 3 4 5 6
7 8 9 10 11 12

TPM00042

TO POWER SUPPLY CIRCUIT

COMBINATION

 METER

TIRE INFLATION 
PRESSURE
WARNING LIGHT

DRIVE CIRCUIT

MICRO COMPUTER

TPM CONTROL MODULE

TPM(diag)-23

Tire Pressure Warning Light / Trouble Indicator Light Illumination Pattern

TIRE PRESSURE MONITORING SYSTEM (DIAGNOSTICS)

Step

Check

Yes

No

1

CHECK DIAGNOSTIC TROUBLE CODE 
(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.>

Is DTC displayed?

Perform the diag-
nosis according to 
DTC. <Ref. to 
TPM(diag)-26, List 
of Diagnostic Trou-
ble Code (DTC).>

Go to step 2.

2

CHECK TRANSMITTER (ID).
Display the transmitter ID of the tire pressure 
monitor system.

Is the transmitter ID registered? Go to step 3.

Register the trans-
mitter ID. <Ref. to 
TPM(diag)-10, 
REGISTER 
TRANSMITTER 
ID, OPERATION, 
Subaru Select 
Monitor.>

3

CHECK TRANSMITTER DATA OUTPUT.
1) Select data display of the tire pressure mon-
itoring.
2) Start the engine and check the tire pressure 
warning light output.

Is the warning light output ON? Replace the tire 

pressure monitor-
ing control module. 
<Ref. to WT-11, 
TIRE PRESSURE 
MONITORING 
CONTROL MOD-
ULE, REMOVAL, 
Tire Pressure 
Monitoring Sys-
tem.>

Replace the com-
bination meter. 
<Ref. to IDI-22, 
REMOVAL, Com-
bination Meter.>

TPM(diag)-24

Tire Pressure Warning Light / Trouble Indicator Light Illumination Pattern

TIRE PRESSURE MONITORING SYSTEM (DIAGNOSTICS)

D: TIRE PRESSURE WARNING LIGHT IS 25 TIMES BLINKING AND TURN ON

DETECTING CONDITION:
• Tire pressure monitoring control module is faulty.
• Defective harness
• Transmitter is faulty.
TROUBLE SYMPTOM:
Every time the engine starts, tire pressure warning light blinks 25 times and then illuminates.
WIRING DIAGRAM:

FB-36

F/B FUSE NO.5

(IG)

2

6

A:

i10

B:

i11

A3

B6

FB-17

F/B FUSE NO. 7

 (B)

i102

R167

R211

FB-48

F/B FUSE NO. 4

 (IG)

16

5

9

1 2 3

4 5 6

7 8 9 10 11 12 13 14

B:

i11

i102

1 2 3
8 9 10

4

11 12 13 14 15 16

5 6 7

A:

i10

1 2 3 4 5

6 7 8 9 10

11 12

19 20 21

13 14 15 16

17 18

22

R211

1 2 3 4 5 6
7 8 9 10 11 12

TPM00042

TO POWER SUPPLY CIRCUIT

COMBINATION

 METER

TIRE INFLATION 
PRESSURE
WARNING LIGHT

DRIVE CIRCUIT

MICRO COMPUTER

TPM CONTROL MODULE

TPM(diag)-25

Tire Pressure Warning Light / Trouble Indicator Light Illumination Pattern

TIRE PRESSURE MONITORING SYSTEM (DIAGNOSTICS)

Step

Check

Yes

No

1

CHECK DIAGNOSTIC TROUBLE CODE 
(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.>

Is diagnostics code (DTC) dis-
played?

Perform the diag-
nosis according to 
DTC. <Ref. to 
TPM(diag)-26, List 
of Diagnostic Trou-
ble Code (DTC).>

Go to step 2.

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.

Is the voltage 10 V or more?

Go to step 3.

Go to step 4.

3

CHECK HARNESS.
1) Check the output waveform displayed in the 
oscilloscope of Subaru Select Monitor.

Is the pattern the same output 
waveform as shown in the fig-
ure?
(1) 400

r20 ms Duty 50 %

High: Battery voltage
Low:1.5 V or less

Check the combi-
nation meter.

Replace the tire 
pressure monitor-
ing control module. 
<Ref. to WT-11, 
REMOVAL, Tire 
Pressure Monitor-
ing System.>

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 the voltage 10 V or more?

Replace the tire 
pressure monitor-
ing control module. 
<Ref. to WT-11, 
REMOVAL, Tire 
Pressure Monitor-
ing System.>

The harness 
between the com-
bination meter 
connector and the 
tire pressure moni-
toring control mod-
ule connector is 
shorted or open. 
Repair or replace 
the harness.

TPM00044

High

Low

(1)

 

 

 

 

 

 

 

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