Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 482
TPM(diag)-5
Electrical Component Location
TIRE PRESSURE MONITORING SYSTEM (DIAGNOSTICS)
3. Electrical Component Location
A: LOCATION
(1)
TPMS & keyless entry control
module
(2)
Tire pressure warning light
(3)
Snap-in type transmitter
• 5 DOOR MODEL
• 4 DOOR MODEL
TPM00075
(1)
(1)
(2)
(3)
(3)
TPM00076
(1)
TPM00077
(1)
TPM00048
(2)
(3)
TPM00049
TPM(diag)-6
Control Module I/O Signal
TIRE PRESSURE MONITORING SYSTEM (DIAGNOSTICS)
4. Control Module I/O Signal
A: ELECTRICAL SPECIFICATION
B: WIRING DIAGRAM
<Ref. to WI-71, WIRING DIAGRAM, Tire Pressure
Terminal
No.
Content
Measured value and measuring
conditions
Remarks
1
—
—
—
2
Tire pressure warning light output
Illuminate when malfunction
occurs, or tire pressure decreases
System failure: blinks 25 times → illuminates
Tire pressure decreases: turns on
3
Speed sensor signal
While driving (Pulse signal)
Change according to vehicle speed
4
Ignition power supply
IG switch ON (Battery voltage)
—
5
GND
0 V (Always)
—
6
Battery power supply
Battery voltage (Always)
—
7
—
—
—
8
—
—
—
9
—
—
—
10
—
—
—
11
Body integrated unit
—
—
12
Select monitor communication
Serial communication
—
10
12 11
1
2
4 3
6 5
9 8 7
R221
TPM00081
TO
TPM(diag)-7
Subaru Select Monitor
TIRE PRESSURE MONITORING SYSTEM (DIAGNOSTICS)
5. Subaru Select Monitor
A: OPERATION
1. READ DIAGNOSTIC TROUBLE CODE
(DTC)
1) Prepare the Subaru Select Monitor kit. <Ref. to
TPM(diag)-4, SPECIAL TOOL, PREPARATION
2) Connect the diagnosis cable to Subaru Select
Monitor.
3) Connect the Subaru Select Monitor to data link
connector.
(1) Data link connector is located in the lower
portion of instrument panel (on the driver’s
side).
(2) Connect the diagnosis cable to data link
connector.
CAUTION:
Do not connect scan tools other than the Suba-
ru Select Monitor.
4) Turn the ignition switch to ON and run the Suba-
ru Select Monitor.
5) On «Main Menu» display, select {Each System
Check}.
6) On «System Selection Menu» display, select
{Tire pressure monitor}.
7) On «Tire pressure monitor diagnosis» display,
select {Diagnostic Code(s) Display}.
NOTE:
• For detailed operation procedures, refer to “PC
application help for Subaru Select Monitor”.
• For details concerning DTCs, refer to List of Di-
agnostic Trouble Code (DTC). <Ref. to TPM(diag)-
20, List of Diagnostic Trouble Code (DTC).>
• All DTCs detected will be displayed.
• If a particular DTC is not properly stored in mem-
ory (due to a voltage drop of the TPMS & keyless
entry control module power supply, etc.) when a
problem occurs, a DTC suffixed with a question
mark will appears on the Subaru Select Monitor
display. This shows it may be an unreliable read-
ing.
8) If TPMS & keyless entry control module and
Subaru Select Monitor cannot communicate, check
the communication circuit. <Ref. to TPM(diag)-10,
COMMUNICATION FOR INITIALIZING IMPOSSI-
BLE, INSPECTION, Subaru Select Monitor.>
9) When DTC is not displayed, check the tire infla-
tion pressure warning light blinking patterns. <Ref.
to TPM(diag)-15, INSPECTION, Tire Pressure
Warning Light / Trouble Indicator Light Illumination
IM-00275
TPM(diag)-8
Subaru Select Monitor
TIRE PRESSURE MONITORING SYSTEM (DIAGNOSTICS)
2. DATA DISPLAY
1) On «Main Menu» display, select {Each System Check}.
2) On «System Selection Menu» display, select {Tire pressure monitor}.
3) After the {Tire pressure monitor} is displayed, select [OK].
4) On «Tire pressure monitor diagnosis» display, select {Data Display}, and then necessary data will be dis-
played.
• A list of the support data is shown in the following table.
3. CLEAR MEMORY
1) On «Main Menu» display, select {Each System
Check}.
2) On «System Selection Menu» display, select
{Tire pressure monitor}.
3) After the {Tire pressure monitor} is displayed,
select [OK].
4) On «Tire pressure monitor diagnosis» display,
select {Clear Memory}.
5) When “Done” and “Turn off the ignition switch.”
are shown on the display screen, turn the Subaru
Select Monitor and the ignition switch to OFF.
NOTE:
For details concerning the operation procedure, re-
fer to “PC application help for Subaru Select Moni-
tor”.
1. Data monitor (analog)
Display
Contents to be displayed
Unit of measure
Tire 1 FN code
LEARN, LOW BAT, OFF, WAKE, RE ME,
NORMAL
LEARN: Transmitter ID has been sent by the transmitter
registration tool.
LOW BAT: Battery voltage of the transmitter has been
lowered.
OFF: Transmitter is not functioning. (No data transmis-
sion)
RE ME: When the tire pressure changed within the
range of ±8.4 kPa.
WAKE: When data transmission started from the stop
status.
NORMAL: Conditions other than the above.
Tire 2 FN code
Tire 3 FN code
Tire 4 FN code
Tire 1 air pressure
Value converted to tire pressure from data
delivered from transmitter is displayed.
(The figure may differ from the actual
measured values.)
kPa, psig, mmHg, inHg
Tire 2 air pressure
kPa, psig, mmHg, inHg
Tire 3 air pressure
kPa, psig, mmHg, inHg
Tire 4 air pressure
kPa, psig, mmHg, inHg
Vehicle speed
Vehicle speed signal which is input in con-
trol module
km/h (MPH)
Pressure warning
Threshold where tire pressure warning
light illuminates
kPa, psig, mmHg, inHg
Return pressure
Threshold where tire pressure warning
light goes out
kPa, psig, mmHg, inHg
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