Toyota Sequoia (2005). Manual — part 270
F19790
Combination Meter
Tire Pressure
Monitor ECU
Engine Room J/B
I18
Ignition SW
IGN1
B–O
IG2
AM2
1C
11
Battery
2
1H
T17
C5
GR–L
Tire Pressure
B–R
B
5
6
5
4
AM2
24
6
IND
Instrument Panel J/B
C6
20
2D
1
2C
1
1C
3
1J
7
F10
Fusible Link Block
Instrument Panel J/B
W–R
W–R
B
T17
T18 Tire Pressure
Warning Reset SW
G–R
CALSW
GND
T17
1H
1H
1F
7
1
10
W–B
11
10
Instrument Panel J/B
W–B
A
J8
J/C
IE
1
2
–
DIAGNOSTICS
TIRE PRESSURE WARNING SYSTEM
DI–875
1069
Tire Pressure Warning Reset Switch Circuit
CIRCUIT DESCRIPTION
Receiving the signal from the tire pressure warning reset switch, the tire pressure monitor ECU indicates the
initialization of the pressure warning system.
WIRING DIAGRAM
DIDKG–01
F19144
Tire Pressure Warning Reset Switch
ON
OFF
2
1
DI–876
–
DIAGNOSTICS
TIRE PRESSURE WARNING SYSTEM
1070
INSPECTION PROCEDURE
NOTICE:
It is necessary to register an ID code after replacing the tire pressure monitor valve sub–assy and/or
tire pressure monitor ECU (see page
).
1
Check tire pressure warning reset switch function.
CHECK:
Perform the tire pressure warning reset switch test in TEST MODE PROCEDURE (see page
OK:
Reset switch ON: Tire pressure warning lamp comes on.
Reset switch OFF: Tire pressure warning lamp blinks.
NG
Go to step 2.
OK
End.
2
Inspect tire pressure warning reset switch.
PREPARATION:
Disconnect the tire pressure warning reset switch connector.
CHECK:
Measure the resistance between terminals 1 and 2 of the tire
pressure warning reset switch when the tire pressure warning
switch is ON and OFF.
OK:
Switch Condition
Specified Condition
ON
Below 1
Ω
OFF
10 k
Ω
or higher
NG
Replace tire pressure warning reset switch.
OK
F19884
Tire Pressure Warning Reset Switch
(harness side connector)
Tire Pressure Monitor ECU:
T18
CALSW
T17
–
DIAGNOSTICS
TIRE PRESSURE WARNING SYSTEM
DI–877
1071
3
Check harness and connector (Tire pressure warning reset switch – Tire pres-
sure monitor ECU)
PREPARATION:
Disconnect the tire pressure warning reset switch T18 connec-
tor and tire pressure monitor ECU T17 connector .
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester Connection
Specified Condition
T17–10 (CALSW) – T18–1
Below 1
Ω
T17–10 (CALSW) – Body ground
10 k
Ω
or higher
NG
Repair or replace harness or connector.
OK
Replace tire pressure monitor ECU
(See page
F19175
Tire Pressure
Monitor ECU
IG
GND
T17
11
B–R
I18
Ignition SW
2
AM1
8
W
Battery
T17
2
8
3C
A
A
J37
J/C
B–R
IG1
1
ECU–IG
B–R
B–Y
1
5
2
AM1
ALT
B
W–B
A
J8
J/C
W–B
W–L
F10
Fusible Link Block
Instrument Panel J/B
8
3A
4
1F
4
1C
1
1L
6
1C
Instrument Panel J/B
IE
10
1F
1
1H
Instrument Panel J/B
Sub J/B No. 3
DI–878
–
DIAGNOSTICS
TIRE PRESSURE WARNING SYSTEM
1072
ECU Power Source Circuit
CIRCUIT DESCRIPTION
This is the power source for the tire pressure monitor ECU. It also supplies power to the tire pressure monitor
receiver via the ECU.
WIRING DIAGRAM
DIDKH–01
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