2007 TOYOTA SIENNA Service Repair Manual

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Page 2345 of 3000

TOYOTA SIENNA 2007 Service Repair Manual TIRE AND WHEEL – TIRE PRESSURE WARNING ECUTW–89
TW
(b) Install the tire pressure warning ECU with the screw.
2. INSTALL INSTRUMENT PANEL SAFETY PAD SUB-
ASSEMBLY
HINT:
Refer to the instructions

Page 2346 of 3000

TOYOTA SIENNA 2007 Service Repair Manual TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEMTW–31
TW
PROBLEM SYMPTOMS TABLE
HINT:
• Use the table below to help determine the cause of the
problem symptom. The potential causes of the sympto

Page 2347 of 3000

TOYOTA SIENNA 2007 Service Repair Manual TW–32TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEM
TW
TERMINALS OF ECU
1. CHECK TIRE PRESSURE WARNING ECU
HINT:
Inspect the connectors from the back side while the
connectors are connected.
(a)

Page 2348 of 3000

TOYOTA SIENNA 2007 Service Repair Manual TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEMTW–33
TW
(e) Using an oscilloscope, check the waveform 1.
(1) Waveform 1 (Reference)
(2) Waveform 2 (Reference)
F047507E08
Item Contents
Terminal SPD

Page 2349 of 3000

TOYOTA SIENNA 2007 Service Repair Manual TW–90TIRE AND WHEEL – TIRE PRESSURE WARNING RESET SWITCH
TW
SUSPENSION & AXLE
TIRE AND WHEEL
TIRE PRESSURE WARNING RESET SWITCH
COMPONENTS
C155499E01

Page 2350 of 3000

TOYOTA SIENNA 2007 Service Repair Manual TIRE AND WHEEL – TIRE PRESSURE WARNING RESET SWITCHTW–91
TW
REMOVAL
1. DISCONNECT CABLE FROM NEGATIVE BATTERY
TERMINAL
2. REMOVE FRONT DOOR SCUFF PLATE LH
3. REMOVE COWL SIDE TRIM SUB-ASSEMBLY

Page 2351 of 3000

TOYOTA SIENNA 2007 Service Repair Manual TW–92TIRE AND WHEEL – TIRE PRESSURE WARNING RESET SWITCH
TW
INSTALLATION
1. INSTALL TIRE PRESSURE WARNING RESET
SWITCH
(a) Engage the 2 claws to install the tire pressure
warning reset switch

Page 2352 of 3000

TOYOTA SIENNA 2007 Service Repair Manual TW–34TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEM
TW
DIAGNOSIS SYSTEM
1. CHECK BATTERY VOLTAGE
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge the battery before
proceeding

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