2007 TOYOTA SIENNA Service Repair Manual

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TOYOTA SIENNA 2007  Service Repair Manual U151E AUTOMATIC TRANSAXLE  –  DIFFERENTIAL CASEAX–271
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6. INSTALL FRONT DIFFERENTIAL CASE REAR 
TAPERED ROLLER BEARING
(a) Using SST and a press, install the front differential 
case front taper

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TOYOTA SIENNA 2007  Service Repair Manual AX–272U151E AUTOMATIC TRANSAXLE  –  DIFFERENTIAL CASE
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42 mm (1.654 in.)
Bolt D:
72 mm (2.835 in.)
HINT:
Usually, bolt A is non-reusable. In this case, 
however, the bolt can be used after clean

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TOYOTA SIENNA 2007  Service Repair Manual U151E AUTOMATIC TRANSAXLE  –  DIFFERENTIAL CASEAX–273
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(g) Remove the differential assembly.
8. INSTALL FRONT DIFFERENTIAL RING GEAR
(a) Using ATF and heater, heat the front differential ring 
g

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TOYOTA SIENNA 2007  Service Repair Manual AX–274U151E AUTOMATIC TRANSAXLE  –  DIFFERENTIAL CASE
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10. INSTALL DIFFERENTIAL SIDE BEARING RETAINER 
OIL SEAL
(a) Using SST and a hammer, install a new oil seal.
SST 09710-30050, 09950-70010 (

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TOYOTA SIENNA 2007  Service Repair Manual U151F AUTOMATIC TRANSAXLE  –  AUTOMATIC TRANSAXLE SYSTEMAX–5
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SYSTEM DIAGRAM
The configuration of the electronic control system in the 
U151F automatic transaxles is as shown in the following 
c

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TOYOTA SIENNA 2007  Service Repair Manual AX–6U151F AUTOMATIC TRANSAXLE  –  AUTOMATIC TRANSAXLE SYSTEM
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SYSTEM DESCRIPTION
1. SYSTEM DESCRIPTION
(a) The ECT (Electronic controlled automatic 
transmission/transaxle) is an automatic 
tran

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TOYOTA SIENNA 2007  Service Repair Manual U151F AUTOMATIC TRANSAXLE  –  AUTOMATIC TRANSAXLE SYSTEMAX–7
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HOW TO PROCEED WITH 
TROUBLESHOOTING
HINT:
• The ECM of this system is connected to the CAN and 
multiplex communication system. T

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TOYOTA SIENNA 2007  Service Repair Manual AX–8U151F AUTOMATIC TRANSAXLE  –  AUTOMATIC TRANSAXLE SYSTEM
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HINT:
(See page IN-35).
NEXT
HINT:
(See page AX-27).
HINT:
(See page AX-127, AX-123 and AX-148).
NG
OK
HINT:
(See page AX-12).
NG
OK