2007 TOYOTA SIENNA Service Repair Manual

technical data octane inflation pressure recommended oil wheel bolt torque engine

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Page 1489 of 3000

TOYOTA SIENNA 2007 Service Repair Manual U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–123
AX
DESCRIPTION
The linear solenoid valve (SLT) controls the transmission line pressure for smooth transmission operation
based on si

Page 1490 of 3000

TOYOTA SIENNA 2007 Service Repair Manual AX–124U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
COMPONENT OPERATING RANGE
WIRING DIAGRAM
The monitor will run whenever

Page 1491 of 3000

TOYOTA SIENNA 2007 Service Repair Manual U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–125
AX
INSPECTION PROCEDURE
(a) Disconnect the transmission wire connector from the
transaxle.
(b) Measure the resistance according to t

Page 1492 of 3000

TOYOTA SIENNA 2007 Service Repair Manual AX–126U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
(a) Remove the shift solenoid valve (SLT).
(b) Measure the resistance according to the value(s) in the
table below.
Standard resi

Page 1493 of 3000

TOYOTA SIENNA 2007 Service Repair Manual U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–127
AX
DESCRIPTION
The shift solenoid valve DSL is turned "ON" and "OFF" by signals from the ECM in order to control the

U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–127
AX
DESCRIPTION
The shift solenoid valve DSL is turned "ON" and "OFF" by signals from the ECM in order to control the
hydraulic pressure operation, the lock-up relay valve, which then controls operation of the lock-up clutch.
MONITOR DESCRIPTION
Torque converter lock-up is controlled by the ECM based on engine rpm, engine load, engine
temperature, vehicle speed, transmission temperature, and shift range selection. The ECM determines
the lock-up status of the torque converter by comparing the engine rpm (NE) to the input turbine rpm (NT).
The ECM calculates the actual transmission gear by comparing input turbine rpm (NT) to counter gear
rpm (NC). When conditions are appropriate, the ECM requests "lock-up" by applying control voltage to the
shift solenoid DSL. When the DSL is opened, it applies pressure to the lock-up relay valve and locks the
torque converter clutch. If the ECM detects an open or short in the DSL solenoid circuit, the ECM
interprets this as a fault in the DSL solenoid or circuit. The ECM will turn on the MIL and store the DTC.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
P2769: Range check (Low resistance):
P2770: Range check (High resistance):
DTC P2769Torque Converter Clutch Solenoid Circuit Low
(Shift Solenoid Valve DSL)
DTC P2770Torque Converter Clutch Solenoid Circuit High
(Shift Solenoid Valve DSL)
DTC No. DTC Detection Condition Trouble Area
P2769ECM detects short in solenoid valve DSL circuit (0.1
sec.) when solenoid valve DSL is operated (2-trip
detection logic)• Short in shift solenoid valve DSL circuit
• Shift solenoid valve DSL
•ECM
P2770ECM detects open in solenoid valve DSL circuit (0.1
sec.) when solenoid valve DSL is not operated (2-trip
detection logic)• Open in shift solenoid valve DSL circuit
• Shift solenoid valve DSL
•ECM
Related DTCsP2769: Shift solenoid valve DSL/Range check (Low resistance)
P2770: Shift solenoid valve DSL/Range check (High resistance)
Required sensors/Components Shift solenoid valve DSL
Frequency of operation Continuous
Duration 0.064 sec. or more
MIL operation 2 driving cycles
Sequence of operation None
The monitor will run whenever this DTC is not present. None
Shift solenoid valve DSLON
Solenoid current cut status Not cut
Battery voltage8 V or more
Ignition switchON
Sta r t e rOFF
The monitor will run whenever this DTC is not present. None
Shift solenoid valve DSLON
Battery voltage8 V or more
Ignition switchON

Page 1494 of 3000

TOYOTA SIENNA 2007 Service Repair Manual AX–128U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
TYPICAL MALFUNCTION THRESHOLDS
P2769: Range check (Low resistance):
P2770: Range check (High resistance):
COMPONENT OPERATING RANG

Page 1495 of 3000

TOYOTA SIENNA 2007 Service Repair Manual U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–129
AX
OK
(a) Connect the transmission wire connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the valu

Page 1496 of 3000

TOYOTA SIENNA 2007 Service Repair Manual AX–10U151E 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–10U151E 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-24).
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-24).
(5) Check abnormal shock and slip at kick-down.

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