U660E Automatic Transaxle -> Control for Your Toyota Alphard Van First Generation (2002-2008)

Model Outline  
for Technician  
Engine  
Chassis  
Body  
Body Electrical  
U660E Automatic Transaxle  
Control  
Control  
Clutch to Clutch Pressure Control  
Line Pressure Optimal Control  
Powertrain Cooperative Control  
Shift Timing Control  
Lock-up Timing Control  
Flex Lock-up Clutch Control  
Coast Downshift Control  
AI (Artificial Intelligence)-SHIFT  
Multi-Mode Automatic Transmission  
26  
Model Outline  
for Technician  
Engine  
Chassis  
Body  
Body Electrical  
U660E Automatic Transaxle  
Clutch to Clutch Pressure Control  
– This control is operated at 2 3 4 5 6 shift  
change  
ATF Temp. Sensor  
Air Flow Meter  
V Bus  
(Local)  
Input Turbine  
Speed Sensor  
Water Temp.  
Sensor  
TCM  
ECM  
Counter Gear  
Speed Sensor  
Throttle Position  
Sensor  
SL1  
SL2  
SL4  
SL3  
C1  
C2  
B3  
B1  
Line Pressure  
27  
Model Outline  
for Technician  
Engine  
Chassis  
Body  
Body Electrical  
U660E Automatic Transaxle  
Powertrain Cooperative Control  
– Excellent start-off performance is ensured  
: U660E  
[Throttle Control at Launch]  
: Conventional  
Accelerator  
Pedal Opening  
Throttle Valve  
Opening  
Tire Slippage  
Suppression  
Response  
improved  
Engine  
Output  
Time  
28  
Model Outline  
for Technician  
Engine  
Chassis  
Body  
Body Electrical  
U660E Automatic Transaxle  
Powertrain Cooperative Control  
– The gear position during accelerator pedal OFF is  
determined by the drive’s pedal operation  
: Sudden accelerator pedal operation  
: Slow accelerator pedal operation  
[Deceleration Force Control]  
Accelerator  
Pedal Opening  
6th  
5th  
4th  
Gear Position  
3rd  
Engine output is changed  
by driver’s input  
Engine  
Output  
Time  
29  
Model Outline  
for Technician  
Engine  
Chassis  
Body  
Body Electrical  
U660E Automatic Transaxle  
Powertrain Cooperative Control  
– Excellent response and shift shock reduction are  
achieved  
[Transient Shifting Control]  
ECM  
TCM  
Drives  
Solenoid  
Valve  
Driver’s  
desired  
drive force  
ETCS-i Control  
ESA Control  
Accelerator Pedal Operation  
Optimal engine output  
Driver’s  
desired drive  
force is  
Engine  
achieved  
Solenoid Valve  
(SL1, SL2,  
Automatic  
Transaxle  
SL3, SL4)  
30  
Model Outline  
for Technician  
Engine  
Chassis  
Body  
Body Electrical  
U660E Automatic Transaxle  
Lock-up Timing Control & Flex Lock-up Clutch Control  
– Operation range  
[Lock-up Timing Control]  
[Flex Lock-up Clutch Control]  
Position or Range  
Gear  
Position or Range  
Gear  
D or S6 S5  
S4  
X
D or S6 S5  
S4  
X
1st  
2nd  
3rd  
4th  
5th  
6th  
X
X
1st  
2nd  
3rd  
4th  
5th  
6th  
X
X
*  
*  
*  
*  
*  
*  
: Available  
X: Not available : Not applicable  
*: Flex Lock-up also operates, when the vehicle is decelerating  
31  
Model Outline  
for Technician  
Engine  
Chassis  
Body  
Body Electrical  
U660E Automatic Transaxle  
Coast Downshift Control  
– This control maintains sufficient engine speed and  
keeps fuel cut control operating for as long as possible  
With Control  
Fuel Cut  
Control ON  
Fuel cut time  
is expanded  
Without Control  
Fuel Cut  
Control OFF  
Fuel Cut  
Control ON  
to 5th to 4th  
6th  
5th  
Fuel Cut  
Control OFF  
to 4th  
to 3rd  
Time  
32  
Model Outline  
for Technician  
Engine  
Chassis  
Body  
Body Electrical  
U660E Automatic Transaxle  
Multi-Mode Automatic Transmission  
– Initial shift range from “D” to “S” is S4 or S5 range  
– It is selected depending on the vehicle speed  
- Default Shift Range -  
P
R
S4  
S5  
5
N
P
Vehicle Speed  
D S  
R
S Position  
Indicator Ligh
N
+
D S  
-
Shift Pattern  
33  
Model Outline  
for Technician  
Engine  
Chassis  
Body  
Body Electrical  
U660E Automatic Transaxle  
Multi-Mode Automatic Transmission  
– When holding the shift lever to “+” position 1 second  
or more, the shift range is shifted up to S6 range  
P
S1  
S4  
R
N
S2  
S3  
S6  
6
S5  
P
D S  
Hold 1 sec.  
or more  
R
Shift Range  
Usable Gear  
S6 (D)  
S5  
6th  
5th  
4th  
3rd  
2nd  
1st  
1st  
1st  
1st  
1st  
N
+
D S  
S4  
S3  
-
S2  
Shift Pattern  
S1  
1st  
34  

Related Topics

U660E Automatic Transaxle

General
Specification
Features
General (Comparison)
Planetary Gear Unit
Torque Converter
Clutch Piston for C2
Linear Solenoid Valve (SL1, SL2, SL3, SL4)
ATF Pressure Switch
Speed Sensor (NT & NC)
Oil Strainer
Differential Case
TCM (Transaxle Control Module)
Automatic Transaxle Compensation Code
Fail-safe
DTCs for TCM
Service Point (Inspection & Fluid Refill)

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