engine TOYOTA SEQUOIA 2001 Service Repair Manual

± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±537
731 Author: Date:
2005 SEQUOIA (RM1146U)
(2) Check engine braking.
While running in the 2 position and 2nd gear, release the accelerator pedal and check the engine
braking effect.
(3) Check for abnormal noises during acceleration and deceleration, and for shock at up±shift and
down±shift.
(e) L position test:
Shift into the L position and fully depress the accelerator pedal and check the following points.
(1) Check no up±shift.
While running in the L position, check that there is no up±shift to 2nd gear.
(2) Check engine braking.
While running in the L position, release the accelerator pedal and check the engine braking ef-
fect.
(3) Check for abnormal noises during acceleration and deceleration.
(f) R position test:
Shift into the R position, lightly depress the accelerator pedal, and check that the vehicle moves back-
ward without any abnormal noise or vibration.
CAUTION:
Before conducting this test, ensure that the test area is free from people and obstruction.
(g) P position test:
Stop the vehicle on a grade (more than 5°) and after shifting into the P position, release the parking
brake. Then, check that the parking lock pawl holds the vehicle in place.

DIDIR±01
DI±538
± DIAGNOSTICSAUTOMATIC TRANSMISSION
732 Author: Date:
2005 SEQUOIA (RM1146U)
MECHANICAL SYSTEM TESTS
1. PERFORM MECHANICAL SYSTEM TESTS
(a) Measure the stall speed.
The object of this test is to check the overall performance of the transmission and engine by measuring
the stall speeds in the D positions.
NOTICE:

Perform the test at the normal operating ATF (Automatic Transmission Fluid) temperature 50
to 80°C (122 to 176°F).

Do not continuously run this test for longer than 5 seconds.

To ensure safety, do this test in a wide, clear level area which provides good traction.

The stall test should always be carried out in pairs. One technician should observe the condi-
tions of wheels or wheel stoppers outside the vehicle while the other is doing the test.
(1) Chock all 4 wheels.
(2) Connect a hand±held tester to DLC3.
(3) Fully apply the parking brake.
(4) Using your left foot, keep the brake pedal firmly depressed.
(5) Start the engine.
(6) Shift into the D position. Press all the way down on the accelerator pedal with your right foot.
(7) Quickly read the stall speed at this time.
Stall speed: 2,200 ± 150 rpm
Evaluation:
ProblemPossible cause
(a) Stall engine speed is low in D position

Engine power output may be insufficient

Stator one±way clutch is not operating properly
HINT: If the value is less than the specified value by 600 rpm or
more, the torque converter could be faulty.
(b) Stall engine speed is high in D position

Line pressure is too low

Clutch No.1 (C
1) slipping

One±way clutch No.3 (F
3) is not operating properly

Improper fluid level

± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±539
733 Author: Date:
2005 SEQUOIA (RM1146U)
(b) Measure the time lag.
When the shift lever is shifted while the engine is idling, there will be a certain time lapse or lag before
the shock can be felt. This is used for checking the condition of the direct clutch, forward clutch, and
1st and reverse brake.
NOTICE:

Perform the test at the normal operating ATF (Automatic Transmission Fluid) temperature: 50
to 80°C (122 to 176°F).

Be sure to allow for a 1 minute interval between tests.

Perform the test three times, and measure the time lags. Calculate the average value of the three
time lags.
(1) Connect a hand±held tester to DLC3.
(2) Fully apply the parking brake.
(3) Start and warm up the engine and check idle speed.
Idle speed: approx. 700 rpm (In N position and A/C OFF)
(4) Shift the lever from the N to D position. Using a stop watch, measure the time from when the lever
is shifted until the shock is felt.
Time lag:
N " D Less than 1.2 seconds
(5) In the same manner, measure the time lag for N " R.
Time lag:
N " R Less than 1.5 seconds
Evaluation (If N " D time or N " R time lag is longer than the specified):
ProblemPossible cause
N " D time lag is longer than specified

Line pressure is too low

Clutch No.1 (C
1) worn

One±way clutch No.3 (F
3) is not operating properly
N " R time lag is longer than specified

Line pressure is too low

Clutch No.3 (C
3) worn

Brake No.4 (B
4) worn

One±way clutch No.1 (F
1) is not operating properly

DIDIS±01
D14143
SST
SST
DI±540
± DIAGNOSTICSAUTOMATIC TRANSMISSION
734 Author: Date:
2005 SEQUOIA (RM1146U)
HYDRAULIC TEST
1. PERFORM HYDRAULIC TEST
Measure the line pressure.
NOTICE:

Perform the test at the normal operating ATF (Auto-
matic Transmission Fluid) temperature: 50 to 80°C
(122 to 176°F).

The line pressure test should always be carried out in
pairs. One technician should observe the conditions
of wheels or wheel stoppers outside the vehicle while
the other is performing the test.

Be careful to prevent SST hose from interfering with
the exhaust pipe.

This check must be conducted after checking and ad-
justing engine.

Perform under condition that A/C is OFF.

When conducting stall test, do not continue more
than 10 seconds.
(1) Warm up the ATF (Automatic Transmission Fluid).
(2) Lift the vehicle up.
(3) Remove the test plug on the transmission case cen-
ter right side and connect SST.
SST 09992±00095 (09992±00231, 09992±00271)
(4) Fully apply the parking brake and chock the 4
wheels.
(5) Start the engine and check idling speed.
(6) Keep your left foot pressing firmly on the brake ped-
al and shift into D position.
(7) Measure the line pressure when the engine is idling.
(8) Depress the accelerator pedal all the way down.
Quickly read the highest line pressure when engine
speed reaches stall speed.
(9) In the same manner, do the test in R position.

DIDIU±01
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±543
737 Author: Date:
2005 SEQUOIA (RM1146U)
INITIALIZATION
1. RESET MEMORY
NOTICE:

Perform the RESET MEMORY (AT initialization) when replacing the automatic transmission
assy or ECM.

The RESET MEMORY can be performed only with the Hand±held tester.
HINT:
The ECM memorizes the condition that the ECT controls the automatic transmission assy and engine assy
according to those characteristics. Therefore, when the automatic transmission assy, engine assy, or ECM
has been replaced, it is necessary to reset the memory so that the ECM can memorize the new information.
Reset procedure is as follows.
(a) Turn the ignition switch off.
(b) Connect the hand±held tester to the DLC3.
(c) Turn the ignition switch to the ON position.
(d) Turn the hand±held tester main switch on.
(e) Select the item ºDIAGNOSIS/ENHANCED OBD IIº.
(f) Perform the reset memory procedure from the ENGINE menu.

DIDIW±01
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±551
745 Author: Date:
2005 SEQUOIA (RM1146U)
MONITOR DRIVE PATTERN
1. MONITOR DRIVE PATTERN FOR ECT TEST
(a) Perform this drive pattern as one method to simulate the detection conditions of the ECT malfunctions.
(The DTCs may not be detected due to the actual driving conditions. And some codes may not be de-
tected through this drive pattern.)
HINT:
Preparation for driving

Warm up the engine sufficiently. (Engine coolant temperature is 60 °C (140 °F) or higher).

Drive the vehicle when the atmospheric temperature is ±10 °C (14 °F) or higher. (Malfunction is not
detected when the atmospheric temperature is ±10 °C (14 °F) or less).
Notice in driving

Drive the vehicle through all gears.
Stop " 1st " 2nd " 3rd " 4th " 5th " 5th (lock±up ON).

Repeat the above driving pattern three times or more.
NOTICE:

The monitor status can be checked using the OBD II scan tool. When using the hand±held tes-
ter, monitor status can be found in the ºENHANCED OBD II / DATA LISTº or under ºCARB OBD
IIº.

In the event that the drive pattern must be interrupted (possibly due to traffic conditions or other
factors), the drive pattern can be resumed and, in most cases, the monitor can be completed.

Perform this drive pattern on a level road as much as possible and strictly observe the posted
speed limits and traffic laws while driving.

DIDIX±01
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±553
747 Author: Date:
2005 SEQUOIA (RM1146U)
PROBLEM SYMPTOMS TABLE
HINT:
If a normal code is displayed during the diagnostic trouble code check although the trouble still occurs, check
the electrical circuits for each symptom in the order given in the charts on the following pages and proceed
to the page given for troubleshooting.
The Matrix Chart is divided into 3 chapters.
1. Chapter 1: Electronic Circuit Matrix Chart
Refer to the table below when the trouble cause is considered to be electrical.
If the instruction ºProceed to next circuit inspection shown on matrix chartº is given in the flow chart
of each circuit, proceed to the circuit with the next highest number in the table to continue the check.
If the trouble still occurs even though there are no abnormalities in any of the other circuits, check and
replace the ECM.
HINT:
*1: When the circuit on which mark *1 is attached is defective, DTC could be output (see page DI±573).
SymptomSuspect AreaSee page
No up±shift
(A particular gear, from 1st to 4th gear, is not up±shifted)1. Shift solenoid valve (S1) circuit *1
2. Shift solenoid valve (S2) circuit *1
3. ECM
DI±641
DI±646
IN±35
No up±shift (4th " 5th)
1. O/D main switch circuit
2. Engine coolant temp. sensor circuit *1
3. Speed sensor NT circuit *1
4. Shift solenoid valve (SL1) circuit *1
5. Shift solenoid valve (SL2) circuit *1
6. Shift solenoid valve (SR) circuit *1
7. ECM
DI±688
DI±58
DI±591
DI±603
DI±631
DI±651
IN±35
No up±shift (3rd " 4th)
1. Engine coolant temp. sensor circuit *1
2. Shift solenoid valve (S2) circuit *1
3. ECM
DI±58
DI±646
IN±35
No up±shift (1st " 2nd)
1. Shift position L switch circuit
2. Shift solenoid valve (S2) circuit *1
3. ECM
DI±691
DI±646
IN±35
No down±shift (5th " 4th)
1. O/D main switch circuit
2. Shift solenoid valve (SL1) circuit *1
3. Shift solenoid valve (SL2) circuit *1
4. Shift solenoid valve (SR) circuit *1
5. ECM
DI±688
DI±603
DI±631
DI±651
IN±35
No down±shift (2nd " 1st)
1. Shift position L switch circuit
2. Shift solenoid valve (S2) circuit *1
3. ECM
DI±691
DI±646
IN±35
No down±shift
(A particular gear, from 1st to 4th gear, is not down±shifted)1. Shift solenoid valve (S1) circuit *1
2. Shift solenoid valve (S2) circuit *1
3. ECM
DI±641
DI±646
IN±35
No lock±up
1. ATF temperature sensor circuit *1
2. Stop light switch circuit *1
3. Speed sensor NT circuit *1
4. Shift solenoid valve (SLU) circuit *1
5. Engine coolant temp. sensor circuit *1
6. ECM
DI±582
DI±600
DI±591
DI±680
DI±58
IN±35
No lock±up off4. Shift solenoid valve (SLU) circuit *1
6. ECM
DI±680
IN±35

DI±554
± DIAGNOSTICSAUTOMATIC TRANSMISSION
748 Author: Date:
2005 SEQUOIA (RM1146U) Shift point too high or too low
1. Shift solenoid valve (SLT) circuit *1
2. Speed sensor NT circuit *1
3. Speed sensor SP2 circuit *1
4. Throttle position sensor circuit *1
5. ATF temperature sensor circuit *1
6. ECM
DI±662
DI±591
DI±596
DI±58
DI±582
IN±35
Up±shift to 5th from 4th while shift lever is in 4 position1. O/D main switch circuit
2. ECMDI±688
IN±35
Up±shift to 5th from 4th while engine is cold1. Engine coolant temp. sensor circuit *1
2. ECM
DI±58
IN±35
Up±shift to 4th from 3rd while shift lever is in 3 position1. Park/neutral position switch circuit *1
2. ECM
DI±576
IN±35
Up±shift to 3rd from 2nd while shift lever is in 2 position1. Park/neutral position switch circuit *1
2. ECM
DI±576
IN±35
Up±shift to 2nd from 1st while shift lever is in L position1. Shift position L switch circuit
2. ECMDI±691
IN±35
Harsh engagement (N " D)
1. Speed sensor NT circuit *1
2. Shift solenoid valve (SL1) circuit *1
3. Shift solenoid valve (SLT) circuit *1
4. ECM
DI±591
DI±603
DI±662
IN±35
Harsh engagement (Lock±up)
1. Speed sensor NT circuit *1
2. Speed sensor SP2 circuit *1
3. Shift solenoid valve (SLU) circuit *1
4. ECM
DI±591
DI±596
DI±680
IN±35
Harsh engagement (Any driving position)ECMIN±35
Poor acceleration
1. ATF temperature sensor No.2 circuit *1
2. Engine coolant temp. sensor circuit *1
3. Shift solenoid valve (SLT) circuit *1
4. ECM
DI±666
DI±58
DI±662
IN±35
No engine brakingECMIN±35
No kick±downECMIN±35
Engine stalls when starting off or stopping1. Shift solenoid valve (SLU) circuit *1
2. ECM
DI±680
IN±35
AT Oil Temp. warning light remains on1. ATF temperature sensor No.2 circuit*1DI±666
Lock±up at 3rd gear
1. AT F temperature sensor No.2 circuit 1
2. Engine coolant temp. sensor circuit *1DI±666
DI±58
Shift point too high
2. Engine coolant tem . sensor circuit
3. ECMDI 58
IN±35
Malfunction in shifting1. Park/neutral position switch circuit *1
2. ECM
DI±576
IN±35

DI±556
± DIAGNOSTICSAUTOMATIC TRANSMISSION
750 Author: Date:
2005 SEQUOIA (RM1146U) Harsh engagement (4th " 5th)
1. Shift solenoid valve (SL1)
2. Shift solenoid valve (SL2)
3. Valve body assy
4. Off±vehicle repair matrix chartDI±620
DI±625
AT±10
±
Harsh engagement (5th " 4th)
1. Shift solenoid valve (SL1)
2. Shift solenoid valve (SL2)
3. Valve body assy
4. Off±vehicle repair matrix chartDI±620
DI±625
AT±10
±
Slip or shudder (Forward and reverse)
1. Transmission control cable
2. Valve body assy
3. Oil strainer
4. Off±vehicle repair matrix chartDI±524
AT±10
AT±10
±
No engine braking (1st: L position)1. Valve body assy
2. Off±vehicle repair matrix chartAT±10
±
No engine braking (2nd: 2 position)1. Valve body assy
2. Off±vehicle repair matrix chartAT±10
±
No kick±downValve body assyAT±10
Shift point too high or too low
1. Shift solenoid valve (SLT)
2. Shift solenoid valve (SL1)
3. Valve body assyDI±656
DI±620
AT±10
Poor acceleration1. Shift solenoid valve (SLT)
2. Valve body assyDI±656
AT±10
Engine stalls when starting off or stopping1. Shift solenoid valve (SLU)
2. Valve body assyDI±672
AT±10

± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±557
751 Author: Date:
2005 SEQUOIA (RM1146U)
Chapter 3: Off±Vehicle Repair
(
: A750E, A750F AUTOMATIC TRANSMISSION Repair Manual Pub. No. RM999U)
SymptomSuspect AreaSee page
Vehicle does not move with shift lever in any forward position and
reverse position1. Rear planetary gear unit
2. Torque converter clutch

AT±30
Vehicle does not move with shift lever in R position
1. Brake No. 4 (B4)
2. Clutch No. 3 (C
3)
3. One±way clutch No.4 (F
1)






No up±shift (1st " 2nd)
1. Brake No. 3 (B3)
2. One±way clutch No.1 (F
1)
3. One±way clutch No. 2 (F
2)






No up±shift (2nd " 3rd)Clutch No. 3 (C3)

No up±shift (3rd " 4th)Clutch No. 2 (C2)

No up±shift (4th " 5th)1. Brake No. 1 (B1)
2. Clutch No. 1 (C
1)




No lock±up or No lock±up offTorque converter clutchAT±30
Harsh engagement (N " D)1. Clutch No. 1 (C1)
2. One±way clutch No.3 (F
3)




Harsh engagement (N " R)
1. Clutch No. 3 (C3)
2. Brake No. 4 (B
4)
3. One±way clutch No.1 (F
1)






Harsh engagement (1 " 2)
1. Brake No. 3 (B3)
2. One±way clutch No.1 (F
1)
3. One±way clutch No. 2 (F
2)






Harsh engagement (2 " 3)Clutch No. 3 (C3)

Harsh engagement (3 " 4)Clutch No. 2 (C2)

Harsh engagement (4 " 5th)1. Brake No. 1 (B1)
2. Clutch No. 1 (C
1)




Harsh engagement (Lock±up)Torque converter clutchAT±30
Slip or shudder (Forward and reverse: After warm±up)
1. One±way clutch No.1 (F1)
2. Clutch No. 3 (C
3)
3. Torque converter clutch clutch






Slip or shudder (Particular position: Just after engine starts)Torque converter clutchAT±30
Slip or shudder (R position)
1. Brake No. 4 (B4)
2. One±way clutch No.1 (F
1)
3. Clutch No. 3 (C
3)






Slip or shudder (1st)1. Clutch No. 1 (C1)
2. One±way clutch No.3 (F
3)




Slip or shudder (2nd)
1. Clutch No. 1 (C1)
2. Brake No. 3 (B
3)
3. One±way clutch No.1 (F
1)
4. One±way clutch No.2 (F
2)








Slip or shudder (3rd)
1. Clutch No. 1 (C1)
2. Clutch No. 3 (C
3)
3. One±way clutch No.1 (F
1)






Slip or shudder (4th)1. Clutch No. 1 (C1)
2. Clutch No. 2 (C
2)




Slip or shudder (5th)
1. Clutch No. 2 (C2)
2. Clutch No. 3 (C
3)
3. Brake No. 1 (B
1)






No engine braking (1st - 4th: D position)Clutch No. 1 (C1)