Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 486
TPM(diag)-21
List of Diagnostic Trouble Code (DTC)
TIRE PRESSURE MONITORING SYSTEM (DIAGNOSTICS)
52
Transmitter 2 Battery Voltage
Decrease
Transmitter battery voltage is low.
53
Transmitter 3 Battery Voltage
Decrease
Transmitter battery voltage is low.
54
Transmitter 4 Battery Voltage
Decrease
Transmitter battery voltage is low.
61
Vehicle Speed is Abnormal
Vehicle speed signal is not input to
the control module when the vehi-
cle speed is 6 km/h (3.7 MPH) or
more.
DTC
Item
Contents of diagnosis
Remarks
TPM(diag)-22
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
TIRE PRESSURE MONITORING SYSTEM (DIAGNOSTICS)
11.Diagnostic Procedure with Diagnostic Trouble Code (DTC)
A: DTC 11 TIRE 1 AIR PRESSURE DECREASE
NOTE:
Refer to DTC 14 for diagnostic procedure. <Ref. to TPM(diag)-23, DTC 14 TIRE 4 AIR PRESSURE DE-
CREASE, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
B: DTC 12 TIRE 2 AIR PRESSURE DECREASE
NOTE:
Refer to DTC 14 for diagnostic procedure. <Ref. to TPM(diag)-23, DTC 14 TIRE 4 AIR PRESSURE DE-
CREASE, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
C: DTC 13 TIRE 3 AIR PRESSURE DECREASE
NOTE:
Refer to DTC 14 for diagnostic procedure. <Ref. to TPM(diag)-23, DTC 14 TIRE 4 AIR PRESSURE DE-
CREASE, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
TPM(diag)-23
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
TIRE PRESSURE MONITORING SYSTEM (DIAGNOSTICS)
D: DTC 14 TIRE 4 AIR PRESSURE DECREASE
DTC DETECTING CONDITION:
Inflation pressure of tires dropped below the specified value.
NOTE:
For the specifications, refer to CURRENT DATA. <Ref. to TPM(diag)-8, DATA DISPLAY, OPERATION, Sub-
TROUBLE SYMPTOM:
Tire pressure warning light illuminates.
CAUTION:
When driving vehicle to perform driving test, there should be always 2 persons (driver and checker)
to check.
E: DTC 21 TRANSMITTER 1 NO DATA
NOTE:
Refer to DTC 24 for diagnostic procedure. <Ref. to TPM(diag)-24, DTC 24 TRANSMITTER 4 NO DATA, Di-
agnostic Procedure with Diagnostic Trouble Code (DTC).>
F: DTC 22 TRANSMITTER 2 NO DATA
NOTE:
Refer to DTC 24 for diagnostic procedure. <Ref. to TPM(diag)-24, DTC 24 TRANSMITTER 4 NO DATA, Di-
agnostic Procedure with Diagnostic Trouble Code (DTC).>
G: DTC 23 TRANSMITTER 3 NO DATA
NOTE:
Refer to DTC 24 for diagnostic procedure. <Ref. to TPM(diag)-24, DTC 24 TRANSMITTER 4 NO DATA, Di-
agnostic Procedure with Diagnostic Trouble Code (DTC).>
Step
Check
Yes
No
1
CHECK TIRES.
Lift up the vehicle and check for damage in the
tires.
Are there cracks or damage?
Replace the tire.
2
CHECK TIRES.
Check the tire air pressure.
Is the tire pressure in the speci-
fications?
Adjust the air pres-
sure.
3
CHECK TRANSMITTER.
Drive the vehicle at 40 km/h (25 MPH) or faster
and compare the data from the transmitter on
the four wheels.
Is there a transmitter with differ-
ent data?
4
Is DTC displayed?
Finish the diagno-
sis.
TPM(diag)-24
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
TIRE PRESSURE MONITORING SYSTEM (DIAGNOSTICS)
H: DTC 24 TRANSMITTER 4 NO DATA
DTC DETECTING CONDITION:
Data from each transmitter is not received for 8 minutes.
TROUBLE SYMPTOM:
Tire pressure warning light blinks 25 times and then illuminates.
CAUTION:
When driving vehicle to perform driving test, there should be always 2 persons (driver and checker)
to check.
Step
Check
Yes
No
1
START FL TRANSMITTER.
1) Connect the Subaru Select Monitor and
then turn the ignition switch to ON.
2) Select “Transmit ID data monitor”. <Ref. to
TPM(diag)-9, DISPLAY TRANSMITTER (ID),
OPERATION, Subaru Select Monitor.>
3) Use the transmitter registration tool and
transmit the ID from the FL transmitter to check
“Latest reception ID”.
Is “Latest reception ID”
updated?
Replace front left
transmitter.
2
CHECK FL TRANSMITTER ID.
Check the ID displayed in the updated ID dis-
play and the tire 1 registered ID.
Are the two IDs same?
Record the
received ID update
as the FL transmit-
ter. Go to step
3
START FR TRANSMITTER.
Use the transmitter registration tool and trans-
mit the ID from the FR transmitter to check “Lat-
est reception ID”.
Is “Latest reception ID”
updated?
Replace the front
right transmitter.
4
CHECK FR TRANSMITTER ID.
Check the ID displayed in the updated ID dis-
play and the tire 2 registered ID.
Are the two IDs same?
Record the
received ID update
as the FR transmit-
ter. Go to step
5
START RR TRANSMITTER.
Use the transmitter registration tool and trans-
mit the ID from the RR transmitter to check “Lat-
est reception ID”.
Is “Latest reception ID”
updated?
Replace the RR
transmitter.
6
CHECK RR TRANSMITTER ID.
Check the ID displayed in the updated ID dis-
play and the tire 3 registered ID.
Are the two IDs same?
Record the
received ID update
as the RR transmit-
ter. Go to step
7
START RL TRANSMITTER.
Use the transmitter registration tool and trans-
mit the ID from the RL transmitter to check “Lat-
est reception ID”.
Is “Latest reception ID”
updated?
Replace the RL
transmitter.
8
CHECK RL TRANSMITTER ID.
Check the ID displayed in the updated ID dis-
play and the tire 4 registered ID.
Are the two IDs same?
Record the
received ID update
as the RL transmit-
ter. Go to step
9
CHECK MALFUNCTION TRANSMITTER.
Is ID recorded by this proce-
dure?
10
CHECK MALFUNCTION TRANSMITTER.
Check the registered ID of the transmitter indi-
cated by DTC.
Is there checked ID in the
record?
Replace the trans-
mitter of the
recorded position.
Replace the trans-
mitter showing the
latest ID that is not
included in the reg-
istered IDs.
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