Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual — part 485

TPM(diag)-17

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.

Step

Check

Yes

No

1

CHECK DTC.
Connect the Subaru Select Monitor, and read
the Diagnostic Trouble Code. <Ref. to
TPM(diag)-7, READ DIAGNOSTIC TROUBLE
CODE (DTC), OPERATION, Subaru Select
Monitor.>

Is a DTC displayed?

Perform the diag-
nosis according to
the DTC. <Ref. to
TPM(diag)-20, 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)-9,
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 TPMS

& keyless entry
control module.
<Ref. to WT-8,
TPMS & KEY-
LESS ENTRY
CONTROL MOD-
ULE, REMOVAL,
Tire Pressure
Monitoring Sys-
tem.>

Replace the com-
bination meter.
<Ref. to IDI-16,
REMOVAL, Com-
bination Meter.>

TPM(diag)-18

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:

• Defective TPMS & keyless entry control module

• Defective harness

• Transmitter is faulty.

TROUBLE SYMPTOM:

Every time the engine starts, tire pressure warning light blinks 25 times and then illuminates.

WIRING DIAGRAM:

Tire Pressure Monitoring System <Ref. to WI-71, WIRING DIAGRAM, Tire Pressure Monitoring System.>

Step

Check

Yes

No

1

CHECK DTC.
Connect the Subaru Select Monitor, and read
the Diagnostic Trouble Code. <Ref. to
TPM(diag)-7, READ DIAGNOSTIC TROUBLE
CODE (DTC), OPERATION, Subaru Select
Monitor.>

Is diagnostics code (DTC) dis-
played?

Perform the diag-
nosis according to
the DTC. <Ref. to
TPM(diag)-20, 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 TPMS & keyless entry con-
trol module connector (R221).

Connector & terminal

(R221) 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.

I/F

I/F

R221

1 2 3 4 5 6
7 8 9 10 11 12

1 2 3

4 5 6 7

8 9 10 11 12 13 14 15 16

i102

i10

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

i102

R167

15

R221

TPM00079

34

i10

2

5

2

4

6

TO POWER SUPPLY CIRCUIT

FB-36

F/B FUSE NO. 5

(IG)

FB-48

F/B FUSE NO. 4

(IG)

FB-11

M/B FUSE NO. 8

(B)

COMBINATION

METER

DRIVE

CIRCUIT

MICRO COMPUTER

TIRE INFLATION

PRESSURE

WARNING LIGHT

TPMS & KEYLESS ENTRY CM

TPM(diag)-19

Tire Pressure Warning Light / Trouble Indicator Light Illumination Pattern

TIRE PRESSURE MONITORING SYSTEM (DIAGNOSTICS)

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±9 ms Duty 50%
High: Battery voltage
Low: 1.5 V or less

Check the combi-
nation meter. <Ref.
to IDI-5, INSPEC-
TION, Combina-
tion Meter
System.>

Replace the TPMS
& keyless entry
control module.
<Ref. to WT-8,
REMOVAL, Tire
Pressure Monitor-
ing System.>

4

CHECK HARNESS.
1) Disconnect the TPMS & keyless entry con-
trol module connector.
2) Connect the Subaru Select Monitor to the
terminal No. 2 of the TPMS & keyless entry con-
trol module connector (R221).

Connector & terminal

(R221) 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 TPMS
& keyless entry
control module.
<Ref. to WT-8,
REMOVAL, Tire
Pressure Monitor-
ing System.>

The harness
between the com-
bination meter
connector and the
TPMS & keyless
entry control mod-
ule connector is
shorted or open.
Repair or replace
the harness.

Step

Check

Yes

No

TPM00044

High

Low

(1)

TPM(diag)-20

List of Diagnostic Trouble Code (DTC)

TIRE PRESSURE MONITORING SYSTEM (DIAGNOSTICS)

10.List of Diagnostic Trouble Code (DTC)

A: LIST

DTC

Item

Contents of diagnosis

Remarks

11

Tire 1 Air Pressure Decrease

Tire pressure of tire 1 is reduced.

<Ref. to TPM(diag)-22, DTC 11 TIRE 1 AIR PRES-
SURE DECREASE, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>

12

Tire 2 Air Pressure Decrease

Tire pressure of tire 2 is reduced.

<Ref. to TPM(diag)-22, DTC 12 TIRE 2 AIR PRES-
SURE DECREASE, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>

13

Tire 3 Air Pressure Decrease

Tire pressure of tire 3 is reduced.

<Ref. to TPM(diag)-22, DTC 13 TIRE 3 AIR PRES-
SURE DECREASE, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>

14

Tire 4 Air Pressure Decrease

Tire pressure of tire 4 is reduced.

<Ref. to TPM(diag)-23, DTC 14 TIRE 4 AIR PRES-
SURE DECREASE, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>

21

Transmitter 1 No Data

Data cannot be received from
transmitter 1.

<Ref. to TPM(diag)-23, DTC 21 TRANSMITTER 1
NO DATA, Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>

22

Transmitter 2 No Data

Data cannot be received from
transmitter 2.

<Ref. to TPM(diag)-23, DTC 22 TRANSMITTER 2
NO DATA, Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>

23

Transmitter 3 No Data

Data cannot be received from
transmitter 3.

<Ref. to TPM(diag)-23, DTC 23 TRANSMITTER 3
NO DATA, Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>

24

Transmitter 4 No Data

Data cannot be received from
transmitter 4.

<Ref. to TPM(diag)-24, DTC 24 TRANSMITTER 4
NO DATA, Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>

31

Transmitter 1 Pressure Data
Abnormal

Transmitter 1 data contents are
abnormal.

<Ref. to TPM(diag)-25, DTC 31 TRANSMITTER 1
PRESSURE DATA ABNORMAL, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>

32

Transmitter 2 Pressure Data
Abnormal

Transmitter 2 data contents are
abnormal.

<Ref. to TPM(diag)-25, DTC 32 TRANSMITTER 2
PRESSURE DATA ABNORMAL, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>

33

Transmitter 3 Pressure Data
Abnormal

Transmitter 3 data contents are
abnormal.

<Ref. to TPM(diag)-25, DTC 33 TRANSMITTER 3
PRESSURE DATA ABNORMAL, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>

34

Transmitter 4 Pressure Data
Abnormal

Transmitter 4 data contents are
abnormal.

<Ref. to TPM(diag)-26, DTC 34 TRANSMITTER 4
PRESSURE DATA ABNORMAL, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>

41

Transmitter 1 Function Code
Abnormal

Function code has error.

<Ref. to TPM(diag)-27, DTC 41 TRANSMITTER 1
FUNCTION CODE ABNORMAL, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>

42

Transmitter 2 Function Code
Abnormal

Function code has error.

<Ref. to TPM(diag)-27, DTC 42 TRANSMITTER 2
FUNCTION CODE ABNORMAL, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>

43

Transmitter 3 Function Code
Abnormal

Function code has error.

<Ref. to TPM(diag)-27, DTC 43 TRANSMITTER 3
FUNCTION CODE ABNORMAL, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>

44

Transmitter 4 Function Code
Abnormal

Function code has error.

<Ref. to TPM(diag)-28, DTC 44 TRANSMITTER 4
FUNCTION CODE ABNORMAL, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>

51

Transmitter 1 Battery Voltage
Decrease

Transmitter battery voltage is low.

<Ref. to TPM(diag)-29, DTC 51 TRANSMITTER 1
BATTERY VOLTAGE DECREASE, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>