Toyota Sequoia (2005). Manual — part 269
F19136
Tire Pressure Monitor ECU:
T17
SPD
F19755
C5–20
Combination
Meter
C5
–
DIAGNOSTICS
TIRE PRESSURE WARNING SYSTEM
DI–871
1065
INSPECTION PROCEDURE
NOTICE:
It is necessary to register an ID code after replacing the tire pressure monitor valve sub–assy and/or
the tire pressure monitor ECU (see page
HINT:
When not using the hand–held tester, go to step 2.
1
Read value on hand–held tester.
PREPARATION:
(a)
Connect the hand–held tester to the DLC3.
(b)
Turn the ignition switch to the ON position, and push the hand–held tester main switch ON.
(c)
Select the item below in the DATA LIST, and read its value displayed on the hand–held tester.
TIRE PRESSURE:
Item
Normal Condition
VEHICLE SPEED
Actual vehicle speed
CHECK:
Check that the values indicated on the tester and the combination meter are the same.
OK:
Indicates actual speed.
OK
Replace tire pressure monitor ECU
(See page
NG
2
Check harness and connector (Tire pressure monitor ECU – Combination meter
assy).
PREPARATION:
Disconnect the combination meter assy C5 connector 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
T17–3 (SPD) – C5–20
Below 1
Ω
T17–3 (SPD) – Body ground
10 k
Ω
or higher
F19138
Tire Pressure Monitor ECU:
SPD
GND
T17
9 to 14 V
0
Turn the wheel
DI–872
–
DIAGNOSTICS
TIRE PRESSURE WARNING SYSTEM
1066
NG
Repair or replace harness or connector.
OK
3
Inspect tire pressure monitor ECU.
PREPARATION:
Remove the tire pressure monitor ECU with connectors still
connected.
CHECK:
Check voltage.
(1)
Shift the shift lever to neutral.
(2)
Jack up one of the front wheels.
(3)
Turn the ignition switch to the ON position.
(4)
Measure the voltage between terminals SPD and
GND of the tire pressure monitor ECU when the
front wheel is turned slowly.
OK:
Voltage is generated intermittently.
HINT:
As the vehicle speed (wheel revolution speed) increases, a
cycle of the waveform narrows.
NG
Check combination meter assy (Speed signal
circuit) (See page
OK
Replace tire pressure monitor ECU
(See page
F19174
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
–
DIAGNOSTICS
TIRE PRESSURE WARNING SYSTEM
DI–873
1067
Tire Pressure Warning Lamp Circuit
CIRCUIT DESCRIPTION
If the ECU detects trouble, the tire pressure warning lamp comes on and tire pressure monitor is cancelled
at the same time. At this time, the ECU records a DTC in memory.
Connect terminals Tc and CG of the DLC3 to make the tire pressure warning lamp blink and output the DTC.
WIRING DIAGRAM
DIDKF–01
F19136
Tire Pressure Monitor ECU:
T17
IND
F19755
C5–20
Combination
Meter
C5
DI–874
–
DIAGNOSTICS
TIRE PRESSURE WARNING SYSTEM
1068
INSPECTION PROCEDURE
NOTICE:
It is necessary to register an ID code after replacing the tire pressure monitor valve sub–assy and/or
the tire pressure monitor ECU (see page
HINT:
This procedure must be performed according to the PROBLEM SYMPTOMS TABLE.
1
Check harness and connector (Tire pressure monitor ECU – Combination meter
assy).
PREPARATION:
Disconnect the tire pressure monitor ECU T17 connector and
C5 combination meter.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester Connection
Specified Condition
T17–6 (IND) – C5–20
Below 1
Ω
T17–6 (IND) – Body ground
10 k
Ω
or higher
NG
Repair or replace harness or connector
(Com-
bination meter to tire pressure monitor ECU).
OK
Proceed to next circuit inspection shown in problem symptoms table (See page
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