2007 TOYOTA SIENNA Service Repair Manual

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Page 1689 of 3000

TOYOTA SIENNA 2007 Service Repair Manual U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–9
AX
OK
HINT:
(See page AX-19).
NG
OK
HINT:
(See page AX-19).
NEXT
HINT:
(See page AX-35).
NEXT
NEXT
NEXT
NEXT
14Problem Symptoms Table C

Page 1690 of 3000

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

Page 1691 of 3000

TOYOTA SIENNA 2007 Service Repair Manual AX–8U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
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

Page 1692 of 3000

Page 1693 of 3000

TOYOTA SIENNA 2007 Service Repair Manual AX–10U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
ROAD TEST
1. PROBLEM SYMPTOM CONFIRMATION
(a) Based on the result of the customer problem
analysis, try to reproduce the symptoms.

AX–10U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
ROAD TEST
1. PROBLEM SYMPTOM CONFIRMATION
(a) Based on the result of the customer problem
analysis, try to reproduce the symptoms. If the
problem is that the transaxle does not shift up, shift
down, or the shift point is too high or too low,
conduct the following road test referring to the
automatic shift schedule and simulate the problem
symptoms.
2. ROAD TEST
NOTICE:
Perform the test at the ATF temperature 50 to 80
C
(122 to 176
F) in the normal operation.
(a) D position test:
Shift into the D position and fully depress the
accelerator pedal and check the following points.
(1) Check up-shift operation.
Check that 1
2, 2 3, 3 4 and 4 5th up-
shifts take place, and that the shift points
conform to the automatic shift schedule (See
page SS-31).
HINT:
5th Gear Up-shift Prohibition Control
• Engine coolant temperature is 55
C (131F)
or less and vehicle speed is at 80 km/h (176
mph) or less.
• ATF temperature is -2
C (28F) or less.
4th Gear Up-shift Prohibition Control
• Coolant temperature is 47
C (117F) or less
and vehicle speed is at 55 km/h (34 mph) or
less.
5th and 4th Gear Lock-up Prohibition Control
• Brake pedal is depressed.
• Accelerator pedal is released.
• Coolant temperature is 60
C (140F) or less.
(2) Check for shift shock and slip.
Check for shock and slip at the 1
2, 2 3, 3
4 and 4 5th up-shifts.
(3) Check for abnormal noise and vibration.
Drive in the D position lock-up or 5th gear, and
check for abnormal noises and vibration.
HINT:
The check for the cause of abnormal noise and
vibration must be done very thoroughly as it
could also be due to loss of balance in the
differential, torque converter clutch, etc.
(4) Check kick-down operation.
Check that the possible kick-down vehicle speed
limits for 2nd to 1st, 3rd to 2nd, 4th to 3rd, 5th to
4th kick-downs conform to those indicated on
the automatic shift schedule while driving
through all gears with the shift lever in the D
position (See page SS-31).
(5) Check abnormal shock and slip at kick-down.

Page 1694 of 3000

TOYOTA SIENNA 2007 Service Repair Manual U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–11
AX
(6) Check the lock-up mechanism.
• Drive in D position (5th gear), at a steady
speed (lock-up ON).
• Lightly depress the accel

Page 1695 of 3000

TOYOTA SIENNA 2007 Service Repair Manual AX–12U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
(d) 2 position test:
Shift into the 2 position and fully depress the
accelerator pedal and check the following points.
(1) Check u

Page 1696 of 3000

TOYOTA SIENNA 2007 Service Repair Manual U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–13
AX
MECHANICAL SYSTEM TESTS
1. PERFORM MECHANICAL SYSTEM TESTS
(a) Measure the stall speed.
The object of this test is to check the ove

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