1996 TOYOTA LAND CRUISER clutch

AT0TD−01
−
AUTOMATIC TRANSMISSION AUTOMATIC TRANSMISSION UNIT
AT−25
1996 LAND CRUISER (RM451U)
INSTALLATION
1. CHECK TORQUE CONVERTER CLUTCH INSTALLA-
TION
Using calipers and a straight edge, measure from the installed
surface of the transmission housing. Correct distance: More than 15.7 mm (0.618 in.)
2. INSTALL TRANSMISSION
Installation is in the reverse order of removal (See page
AT −20 ).
HINT:
After installation, adjust the shift lever position and throttle
cable (See page DI−131).
Fill and check fluid level (See page DI−131).
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DI−136
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
1996 LAND CRUISER (RM451U)
If the lock−up is defective:
Lock−up solenoid is stuck.
Lock−up control valve is stuck.
Lock−up signal value is stuck.
(2) In the same way, check the shock and slip at the 1 → 2, 2 →3 and 3 → O/D up−shift.
Evaluation:
If the shock is excessive:
Line pressure is too high.
Accumulator is defective.
Check ball is defective. (3) Run at the D position lock −up or O/D gear and check for abnormal noise and vibration.
HINT:
The check for the cause of abnormal noises and vibration must be made with \
extreme care as it could also
be due to loss of balance in the propeller shaft, differential, torque converter clutch, etc.
(4) While running in the D position, 2nd, 3rd and O/D gears, check to see that the\
possible kick −down
vehicle speed limits for 2 →1, 3 → 2 and O/D →3 kick−downs conform to those indicated on
the automatic shift schedule.
(5) Check for abnormal shock and slip at kick −down.
(6) Check for the lock −up mechanism.
Drive in D position, O/D gear, at a steady speed (lock −up ON) of about 95 km/h (59 mph).
Lightly depress the accelerator pedal and check that the engine RPM does not change
abruptly.
If there is a big jump in engine RPM, there is no lock −up.
(b) 2 position test. Shift into the 2 position and, while driving with the accelerator pedal held \
constantly at the full throttle
valve opening position, push in one of the pattern selectors and check the fo\
llowing points:
HINT:
When the 2nd start switch is on, there is no 1 → 2 up−shift and 2 →1 down−shift.
(1) Check to see that the 1 → 2 up− shift takes place and that the shift point conforms to the automatic
shift schedule.
HINT:
There is no O/D up−shift and lock−up in the 2 position. (2) While running in the 2 position and 2nd ge ar, release the accelerator pedal and check the engine
braking effect.
Evaluation:
If there is no engine braking effect:
2nd coast brake is defective. (3) Check for abnormal noise at acceleration and deceleration, and for shock at up −shift and down −
shift.
(c) L position test. (1) While running in the L position, check to see that there is no up −shift to 2nd gear.
(2) While running in the L position, release the accelerator pedal and check the engine braking ef- fect.
Evaluation:
If there is no engine braking effect:
1stand reverse brake is defective. (3) Check for abnormal noise during acceleration and deceleration.
(d) R position test. Shift into the R position and fully depress the accelerator pedal and ch\
eck for slipping.
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DI−140
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
1996 LAND CRUISER (RM451U)
(6) Shift into the D position. Press all the way down on the accelerator pedal wi\
th your right foot.
Quickly read the stall speed at this time.
Stall speed: 1,950 ± 150 rpm
(7) Do the same test in R position.
Stall speed: 1,950 ± 150 rpm
Evaluation:
ProblemPossible cause
Stall speed low in D and R positions
 Engine output may be insuf ficient
 Stator one− way clutch is operating properly
HINT:
If more than 600 rpm below the specified value, the torque con-
verter clutch could be faulty.
Stall speed high in D position
 Line pressure too low
 Forward clutch slipping
 No. 2 one− way clutch not operating properly
 O/D one− way clutch not operating properly
Stall speed high in R position
Line pressure too low
 Direct clutch slipping
 1st and reverse brake slipping
 O/D clutch slipping
Stall speed high in D and R positions
Line pressure too low
 Improper fluid level
 O/D one− way clutch not operating properly
(b) Measure the time lag.
When the shift lever is shifted while the engine is idling, there will be a certain time lapse o\
r lag before
the shock can be felt. This is used for checking the condition of the O/D d\
irect clutch, forward clutch,
direct clutch and 1st and reverse brake.
NOTICE:
Do the test at normal operating ATF temperature 50 − 80°C (122 − 176° F).
Be sure to allow 1 minute interval between tests.
Take 3 measurements and take the average value.
(1) Fully apply the parking brake.
(2) Start the engine and check idle speed.
Idle speed: 650 ± 50 rpm (In N position and air conditioner OFF)
(3) Shift the shift lever from N to D position. Using a stop watch, measure the ti\
me it takes from shift-
ing the lever until the shock is felt.
In the same manner, measure the time lag for N → R.
Time lag: N → D Less than 1.2 seconds
In the same way, measure the time lag for N → R.
Time lag: N → R Less than 1.5 seconds
If N → D time or N → R time lag is longer than specified:
Evaluation:
ProblemPossible cause
N → D time lag is longer
Line pressure too low
 Forward clutch worn
 O/D one− way clutch not operating properly
N → R time lag is longer
Line pressure too low
 Direct clutch worn
 1st and reverse brake worn
 O/D one− way clutch not operating properly
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DIAGNOSTICS AUTOMATIC TRANSMISSION
DI−141
1996 LAND CRUISER (RM451U)
8. HYDRAULIC TEST
Measure the line pressure.
NOTICE:
Do the test at normal operation ATF temperature 50 − 80°C (122 − 176° F).
The line pressure test should always be carried out in pairs. One techni\
cian should observe
the conditions of wheels or wheel stoppers outside the vehicle while the ot\
her is doing the test.
Be careful to prevent SST’s hose from interfering with the exhaust pipe.
(1) Warm up the ATF.
(2) Remove the test plug on the transmission case right side and connect SST\
(See page AT−18
for the location to connect SST).
SST 09992 −00094 (09992 −00150, 09992−00270)
(3) Fully apply the parking brake and chock the 4 wheels.
(4) Start the engine and check idling speed.
(5) Keep your left foot pressed firmly on the brake pedal and shift into D p\
osition.
(6) Measure the line pressure when the engine is idling.
(7) Press the accelerator pedal all the way down. Quickly read the highest line pr\
essure when engine
speed reaches stall speed.
NOTICE:
Release the accelerator pedal and stop test if the rear wheels begin to rotate before the engine speed
reaches the specified stall speed.
(8) In the same manner, do the test in R position.
Specified line pressure:
Condition D position kPa (kgf/cm2, psi) R position kPa (kgf/cm2, psi)
Idling422 −
481 (4.3 − 4.9, 61 − 70)510 − 608 (5.2 − 6.2, 74 − 88)
Stall1,285 − 1,530 (13.1 − 15.6, 128 − 153)1,579 − 1,932 (16.1 − 19.7, 158 − 193)
If the measured pressures are not up to specified values, recheck the thro\
ttle cable adjustment and retest.
Evaluation:
ProblemPossible cause
If the measured value at all positions are higher
Throttle cable out of adjustment
 Throttle valve defective
 Regulator valve defective
If the measured value at all positions are lower
Throttle cable out of adjustment
 Throttle valve defective
 Regulator valve defective
 Oil pump defective
 O/D direct clutch defective
If pressure is low in the D position onlyD position circuit fluid leakage
 Forward clutch defective
If pressure is low in the R position only
R position circuit fluid leakage
 Direct clutch defective
 1st and reverse brake defective
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DI5KB−03
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
DI−143
1996 LAND CRUISER (RM451U)
DIAGNOSTIC TROUBLE CODE CHART
If a DTC is displayed during the DTC check, check the circuit listed for that code i\
n the table below and pro-
ceed to the page given.
DTC No.
(See page)Detection ItemTrouble AreaMIL*Memory
P0500
( DI−153 )Vehicle Speed Sensor Malfunc-
tion
(No. 1 Vehicle Speed Sensor)Open or short in No. 1 vehicle speed sensor circuit
 No. 1 vehicle speed sensor
 ECM

P0710
( DI−154 )Transmission Fluid Temperature
Sensor Malfunction
(ATF Temperature Sensor) Open or short in ATF temperature sensor circuit
 ATF temperature sensor
 ECM

P0750
( DI−156 )Shift Solenoid A Malfunction
(Shift Solenoid Valve No. 1)Shift solenoid valve No. 1 is stuck open or closed
 Valve body is blocked up or stuck
P0753
( DI−157 )Shift Solenoid A Electrical
Malfunction
(Shift Solenoid Valve No. 1)Open or short in shift solenoid valve No. 1 circuit
 Shift solenoid valve No. 1
 ECM

P0755
( DI−156 )Shift Solenoid B Malfunction
(Shift Solenoid Valve No. 2)Shift solenoid valve No. 2 is stuck open or closed
 Valve body is blocked up or stuck
P0758
( DI−157 )Shift Solenoid B Electrical
Malfunction
(Shift Solenoid Valve No. 2)Open or short in shift solenoid valve No. 2 circuit
 Shift solenoid valve No. 2
 ECM

P0770
( DI−161 )Shift Solenoid E Malfunction
(Shift Solenoid Valve SL)Shift solenoid valve SL is stuck open or closed
 Valve body is blocked up or stuck
 Lock− up clutch

P0773
( DI−163 )Shift Solenoid E Electrical
Malfunction
(Shift Solenoid Valve SL)Open or short in shift solenoid valve SL circuit
 Shift solenoid valve SL
 ECM

P1700
( DI−166 ) Speed Sensor No. 2 Circuit
Malfunction
(No. 2 Vehicle Speed Sensor)Open or short in No. 2 vehicle speed sensor circuit
 No. 2 vehicle speed sensor
 ECM

P1780
( DI−169 )Park/Neutral Position Switch
MalfunctionShort in park/neutral position switch circuit
 Park/neutral position switch
 ECM

*:  ...MIL light up
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DIAGNOSTICS AUTOMATIC TRANSMISSION
DI−151
1996 LAND CRUISER (RM451U)
Slip or shudder (Forward and reverse)
1. Throttle cable
2. Transmission control rod
3. Oil strainer
4. Pressure relief valve
5. Off
−vehicle repair matrix chartDI−131
DI−131

−
Slip or shudder (Particular position)
1. Throttle cable
2. Transmission control rod
3. Off −vehicle repair matrix chartDI−131
DI−131
−
No engine braking (1st (L position))1. Low coast modulator
2. Off −vehicle repair matrix chart
−
No engine braking (2nd (2 position))1. 2nd coast modulator
2. Off −vehicle repair matrix chart
−
No kick− down1. 1−2 shift valve
2. 2 −3 shift valve

Chapter 3: Off −Vehicle Repair
(  : A340F, A343F Automatic Transmission Repair Manual Pub. No. RM479U)
SymptomSuspect AreaSee page
Vehicle does not move in any forward position and reverse posi-
tion1. O/D one− way clutch (F0)
2. O/D planetary gear unit
3. Torque converter clutch

AT −26
Vehicle does not move in R position
1. 2nd coast brake (B1)
2. Front and rear planetary gear unit
3. Direct clutch (C
2)
4. 1st and reverse brake (B
3)




Vehicle does not move in D, 2 and L positions1. Forward clutch (C1)
Vehicle does not move in D and 2 positions1. No. 2 one− way clutch (F2)
Vehicle does not move in 2 position1. 1st and reverse brake (B3)
Vehicle does not move in L position
1. 2nd brake (B2)
2. 2nd coast brake (B
1)
3. Direct clutch (C
2)



No up− shift (1st → 2nd)1. 2nd brake (B2)
2. No. 1 one− way clutch (F
1)


No up−shift (2nd → 3rd)1. Direct clutch (C2)
No up−shift (3rd → O/D)1. O/D brake (B0)
No down−shift (2nd → 1st)1. 2nd brake (B2)
Lock−up does not engage or lock −up does not disengage1. Torque converter clutchAT −26
Harsh engagement (N → D)
1. Forward clutch (C1)
2. O/D one− way clutch (F
0)
3. No. 2 one− way clutch (F
2)



Harsh engagement (N → R)
1. Direct clutch (C2)
2. 1st and reverse brake (B
3)
3. O/D one− way clutch (F
0)



Harsh engagement (2nd → 3rd)1. Direct clutch (C2)
Harsh engagement (3rd → O/D)1. O/D brake (B0)
2. O/D planetary gear unit

Harsh engagement (O/D → 3rd)1. O/D one− way clutch (F0)
Harsh engagement (Lock −up)1. Torque converter clutchAT −26
Slip or shudder (Forward and reverse (After warm −up))
1. Torque converter clutch
2. O/D one− way clutch (F
0)
3. O/D direct clutch (C
0)
AT −26


Slip or shudder (Forward and reverse (Just after engine starts))1. Torque converter clutchAT −26
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DI−152
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
1996 LAND CRUISER (RM451U)
Slip or shudder (R position)
1. Direct clutch (C2)
2. 1st and reverse brake (B
3)
3. O/D one− way clutch (F
0)



Slip or shudder (1st)
1. Forward clutch (C1)
2. No. 2 one− way clutch (F
2)
3. O/D one− way clutch (F
0)



Slip or shudder (2nd)
1. 2nd brake (B2)
2. 2nd coast brake (B
1)
3. No. 1 one− way clutch (F
1)



Slip or shudder (3rd)1. Direct clutch (C2)
Slip or shudder (O/D)1. O/D brake (B0)
No engine braking (1st − 3rd)1. O/D direct clutch (C0)
No engine braking (1st)1. 1st and reverse brake (B3)
No engine braking (2nd)1. 2nd coast brake (B1)
Poor acceleration (All positions)1. Torque converter clutchAT −26
Poor acceleration (O/D)1. O/D brake (B0)
2. O/D planetary gear unit

Poor acceleration (Other than O/D)1. O/D brake (B0)
Poor acceleration (Other than 2nd)1. 2nd coast brake (B1)
2. No. 1 one− way clutch (F
1)


Poor acceleration (1st and 2nd)1. O/D one−way clutch (F0)
Poor acceleration (L and R positions)1. 1st and reverse brake (B3)
Poor acceleration (R position)1. Forward clutch (C1)
Engine stalls when starting off or stopping1. Torque converter clutchAT−26
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D00076
Line
PressureDrain
Q08219
Q08226
D00087
(+)
(−)
(+)(−)
Air
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
DI−161
1996 LAND CRUISER (RM451U)
DTC P0770 Shift Solenoid E Malfunction
(Shift Solenoid Valve SL)
SYSTEM DESCRIPTION
The ECM uses the signals from the throttle position sensor, air −
flow meter and crankshaft position sensor to monitor the en-
gagement condition of the lock −up clutch.
Then the ECM compares the engagement condition of the
lock−up clutch with the lock −up schedule in the ECM memory
to detect mechanical trouble of the shift solenoid valve SL,
valve body and torque converter clutch.
DTC No.DTC Detecting ConditionTrouble Area
P0770
Lock− up does not occur when driving in the lock− up range
(normal driving at 80 km/h [50 mph] ), or lock− up remains ON
in the lock− up OFF range (2 trip detection logic)Shift solenoid valve SL is stuck open or closed
 Valve body blocked up or stuck
 Lock− up clutch
INSPECTION PROCEDURE
1 Check shift solenoid valve SL operation.
PREPARATION:
Remove the shift solenoid valve SL from the valve body.
CHECK:
(a) Applying 490 kPa (5 kgf/cm2, 71 psi) of compressed air,
check that the solenoid valve opens.
(b) When battery voltage is supplied to the shift solenoid
valve, check it does not leak air.
NG Replace shift solenoid valve SL.
OK
DI5KQ−02
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