2001 TOYOTA SEQUOIA engine

DI±518
± DIAGNOSTICSAUTOMATIC TRANSMISSION
712 Author: Date:
2005 SEQUOIA (RM1146U) Output speed sensor
Output shaft speed sensor
Input speed sensor, Input turbine speed sensor ºAº, Speed
sensor (NT), Turbine speed sensorInput turbine speed sensor
PNP switch, NSWPark/neutral position switch
Pressure control solenoidTransmission pressure control solenoid
Shift solenoidTransmission shift solenoid valve
Transmission control switch, Shift lock control unitShift lock control module
Engine immobilizer system, Immobilizer systemVehicle anti±theft system

DIDIL±01
D14205
Shift Solenoid Valve S1
MIL
(Malfunction Indicator Lamp) S1
S2
SL1
SL2
SLT
SLU
SR
WShift Solenoid Valve S2
Shift Solenoid Valve SL1
Shift Solenoid Valve SL2
Shift Solenoid Valve SLT
Shift Solenoid Valve SLU
Shift Solenoid Valve SR
OILW
AT Oil Temp Warning Light ECM Crankshaft Position Sensor
Engine CoolantTemperature Sensor
Combination Meter
Stop Lamp Switch Assy
DLC3
(Data Link Connector 3)THW VTA1, 2
VC
SPD
STPTH01
TC Throttle Position Sensor
ATF (Automatic Transmission
Fluid) Temperature Sensor No. 1Mass Air Flow Meter
Accelerator Pedal Position SensorVPA
VPA2
Shift Lever
(O/D Main Switch)
Input Speed Sensor (NT)NT
Output Speed Sensor (SP2)SP2
TH02
ATF (Automatic Transmission
Fluid) Temperature Sensor No. 2Skid Control ECUNSW
Park/Neutral Position Switch
R, D, 3, 2
VG
NE
L
ODMSIntegration Control and Panel
(Shift Position L Switch)
L4



: 4WD4WD Control ECU
CAN DI±520
± DIAGNOSTICSAUTOMATIC TRANSMISSION
714 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DIAGRAM
The configuration of the electronic control system in the A750E/A750F automatic transmission is as shown
in the following chart.

DIDIM±01
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±521
715 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DESCRIPTION
SYSTEM DESCRIPTION
The ECT (Electronic controlled automatic transmission) is an automatic transmission that electronically con-
trols shift timing using the ECM. The ECM detects electrical signals that indicate engine and driving condi-
tions, and controls the shift point, based on driver habits and road conditions. As a result, fuel efficiency and
power transmission performance are improved.
Shift shock has been reduced by controlling the engine and transmission simultaneously.
In addition, the ECT has features such as follows:

Diagnostic function.

Fail±safe function when a malfunction occurs.

DIDIP±01
12345678
9 10111213141516
D13649
DLC3:
CG
TC
D13654
DI±524
± DIAGNOSTICSAUTOMATIC TRANSMISSION
718 Author: Date:
2005 SEQUOIA (RM1146U)
BASIC INSPECTION
1. CHECK FLUID LEVEL
(a) Using SST, create a short±circuit between terminals TC
and CG of the DLC3.
SST 09843±18040
(b) Start the engine and run at idle.

The A/C switch must be turned off.

On models with active height control suspension &
adaptive variable suspension, turn the height con-
trol switch off.
(c) Slowly move the shift lever through all positions from P to
L, and move it back to the P position.
(d) Switch to the fluid temperature detection mode.
Move the shift lever from the N to the D position, or from
D to N, within 1.5 seconds. (Repeat this operation for 6 se-
conds or more.)
OK: The A/T OIL TEMP warning light comes on for 2
seconds and then goes off.
(e) Return the shift lever to the P position and disconnect ter-
minals TC and CG.
(f) Idle the engine to raise oil temperature.
(g) Lift up the vehicle immediately after the meter indicator
light (ATF temperature warning light) comes on.

The A/T OIL TEMP warning light indicates the ATF
temperature according to the following table.
ATF Temp.Less than optimized
temperatureOptimized temperatureMore than optimized
temperature
A/T OIL TEMP warning lightOFFONBlinking

D14137
Refill Plug
Overflow Plug
D14142Control Shaft Lever
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±525
719 Author: Date:
2005 SEQUOIA (RM1146U)
(h) Remove the overflow plug and check the fluid level.
Standard:
When ATF overflowsATF level is higher than specification
(Go to step (k))
When ATF does not overflow
ATF level is equal to or lower than
specification
(Go to step (i))
HINT:

ºOverflowº indicates the condition under which ATF
drains out from the overflow tube.

The capacity of the overflow tube is approximately 3 cc.
If the amount of drained ATF is little, only the fluid remain-
ing in the tube has drained out. This condition is not con-
sidered as ºoverflowº.
(i) Remove the refill plug.
(j) Add ATF through the refill hole until it flows out from the
overflow hole.
Fluid type: Toyota genuine ATF WS
(k) When the draining ATF has become a trickle, install the
overflow plug with a new gasket.
(l) Install the refill plug if removed.
(m) Lower the vehicle.
(n) Turn the ignition switch off to stop the engine.
2. CHECK FLUID CONDITION
If the fluid smells burnt or is black, replace it (see step 6).
3. INSPECT AND ADJUST SHIFT LEVER POSITION
(a) When shifting the shift lever from the N position to other
positions, check that the lever can be shifted smoothly
and accurately to each position and that the position indi-
cator comes on in accordance with the shift lever position.
If the indicator and shift lever position do not match, carry out
the following adjustment procedures.
(1) Remove the nut and disconnect the shift control
cable from the control shaft lever.
(2) Move the control shaft fully rearward.
(3) Return the control shaft lever 2 notches to the N
position.
(4) Set the shift lever to the N position.
(5) Connect the shift control cable and temporarily
install the control shaft lever nut.
(6) While holding the shift lever lightly toward the R
position side, tighten the control shaft lever nut.
Torque: 14.5 N´m (148 kgf´cm, 11 ft´lbf)

D07226
Neutral Basic Line
Bolt
Groove
DI±526
± DIAGNOSTICSAUTOMATIC TRANSMISSION
720 Author: Date:
2005 SEQUOIA (RM1146U)
(7) Start the engine and make sure that the vehicle
moves forward when shifting the lever from the N to
the D position and reverses when shifting it to the
R position.
4. INSPECT AND ADJUST PARK/NEUTRAL POSITION
(a) Check that the engine can be started when the shift lever
is in the N or P position, but cannot be started in other
positions.
If operation cannot be done as stated above, carry out the fol-
lowing adjustment procedures.

Loosen the park/neutral position switch bolt and set
the shift lever to the N position.

Align the groove with the neutral basic line.

Hold in position and tighten the bolt.
Torque:13 N´m (130 kgf´cm, 9 ft´lbf)
(b) For continuity inspection of the park/neutral position
switch, see page DI±576.
5. CHECK IDLE SPEED
Idle speed (In N position and air conditioner OFF):
700 ± 50 rpm

D14139Overflow Plug
D14140
Refill Plug
12345678
9 10111213141516
D13649
DLC3:
CG
TC
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±529
723 Author: Date:
2005 SEQUOIA (RM1146U)
(4) Temporarily install the gasket and overflow plug.
Torque: 20 NVm (204 kgfVcm, 15 ftVlbf)
(5) Add the proper amount of ATF through the refill
hole.
NOTICE:
Refill amount differs depending on the related procedures
indicated below.
Related proceduresRefill amount
Removal and installation of oil pan1.7 liters (1.8 us qts, 1.5 lmp.qts)
Removal of transmission valve body
assy4.3 liters (4.5 us qts, 3.8 lmp.qts)
Removal of torque converter assy5.4 liters (5.7 us qts, 4.8 lmp.qts)
(6) Temporarily install the O±ring and refill plug.
Torque: 39 NVm (400 kgfVcm, 29 ftVlbf)
(7) Lower down the vehicle.
(8) Using SST, create a short±circuit between terminals
TC and CG of the DLC3.
SST 09843±18040
(9) Start the engine and run at idle.
NOTICE:

The A/C switch must be turned off.

On models with active height control suspension &
adaptive variable suspension, turn the height control
switch off.
(10) Slowly move the shift lever from the P to the 2±L
position.
Return the shift lever to the P position.

D13654
D14231
When fluid
temperature
is low: offWhen fluid
temperature
is correct: onWhen fluid
temperature
is high: blinks
D14139Overflow Plug
DI±530
± DIAGNOSTICSAUTOMATIC TRANSMISSION
724 Author: Date:
2005 SEQUOIA (RM1146U)
(11) Switch to the fluid temperature detection mode.
Move the shift lever from the N to the D position, or
from D to N, within 1.5 seconds. (Repeat this opera-
tion for 6 seconds or more.)
OK: The A/T OIL TEMP warning light comes on for 2
seconds and then goes off.
(12) Disconnect terminals TC and CG after confirming
the above condition.
(13) Idle the engine to raise the fluid temperature.
(14) Lift up the vehicle immediately after the meter indi-
cator light (ATF temperature warning light) comes
on.
NOTICE:

Add fluid only when the meter indicator light is on.

Perform this procedure while the engine is idling.
(15) Remove the overflow plug. If ATF overflows, pro-
ceed to [*2].
If ATF does not overflow, proceed to [*3].
HINT:
ºOverflowº indicates the condition under which ATF drains out
from the overflow tube.
NOTICE:
Capacity of the overflow tube is approximately 3 cc.