1998 TOYOTA LAND CRUISER automatic transmission fluid

DI-390
- DIAGNOSTICSAUTOMATIC TRANSMISSION
583 Author
: Date
:
2004 LAND CRUISER (RM1071U)P0776
(DI-445)
Pressure Control Solenoid ºBº
Performance
(Shift Solenoid Valve SL2)
Shift solenoid valve SL2 is stuck open or closed
Valve body is blocked up or stuck
Shift solenoid valve SL2
Automatic transmission assembly
ECM


P0778
(DI-449)Pressure Control Solenoid ºBº
Electrical
(Shift Solenoid Valve SL2)Open or short in shift solenoid valve SL2 circuit
Shift solenoid valve SL2
ECM


P0781
(DI-453)1-2 Shift
Valve body is blocked up or stuck (1-2 shift valve)
Automatic transmission assembly
ECM


P0818
(DI-457)Driveline Disconnect Switch In-
put CircuitShort in transfer neutral position switch circuit
Transfer neutral position switch
ECM


P0850
(DI-402)Park/Neutral Switch Input Circuit
Short in park/neutral position switch circuit
Park/neutral position switch
ECM


P0973
(DI-460)Shift Solenoid ºAº Control Circuit
Low (Shift Solenoid Valve S1)Open or short in shift solenoid valve S1 circuit
Shift l id l S1


P0974
(DI-460)Shift Solenoid ºAº Control Circuit
High (Shift Solenoid Valve S1)Shift solenoid valve S1
ECM


P0976
(DI-464)Shift Solenoid ºBº Control Circuit
Low (Shift Solenoid Valve S2)Open or short in shift solenoid valve S2 circuit
Shift l id l S2


P0977
(DI-464)Shift Solenoid ºBº Control Circuit
High (Shift Solenoid Valve S2)Shift solenoid valve S2
ECM


P0985
(DI-468)Shift Solenoid ºEº Control Circuit
Low (Shift Solenoid Valve SR)Open or short in shift solenoid valve SR circuit
Shift l id l SR


P0986
(DI-468)Shift Solenoid ºEº Control Circuit
High (Shift Solenoid Valve SR)Shift solenoid valve SR
ECM


P1782
(DI-472)T/F L4 Range Position Switch
PerformanceShort in transfer L4 position switch circuit
Transfer L4 position switch
ECM


P2714
(DI-476)Pressure Control Solenoid ºDº
Performance
(Shift Solenoid Valve SLT)
Shift solenoid valve SLT is stuck open or closed
Valve body is blocked up or stuck
Shift solenoid valve SLT
Automatic transmission assembly
ECM


P2716
(DI-479)Pressure Control Solenoid ºDº
Electrical
(Shift Solenoid Valve SLT)Open or short in shift solenoid valve SLT circuit
Shift solenoid valve SLT
ECM


P2740
(DI-483)Transmission Fluid Temperature
Sensor ºBº CircuitOpen or short in ATF temperature sensor No. 2 circuit
ATF temperature sensor No. 2
ECM


P2742
(DI-483)Transmission Fluid Temperature
Sensor ºBº Circuit LowShort in ATF temperature sensor No. 2 circuit
ATF temperature sensor No. 2
ECM


P2743
(DI-483)Transmission Fluid Temperature
Sensor ºBº Circuit HighOpen in ATF temperature sensor No. 2 circuit
ATF temperature sensor No. 2
ECM



DI-366
- DIAGNOSTICSAUTOMATIC TRANSMISSION
559 Author
: Date
:
PATTERN SW (M)Pattern SW (PWR) Status/
ON or OFFPattern SW (PWR) is;
Pushed in: ON
Pushed once again: OFF
u
SNOW SWPattern SW (2nd) Status/
ON or OFF

IG SW ON: OFF
O

Pattern SW (2nd) Push: ON
O

Pattern SW (2nd) Push: OFF
u
SOLENOID (SLT)Shift Solenoid SLT Status/
ON or OFFIG SW ON: ONu
SOLENOID (SLU)Shift Solenoid SLU Status/
ON or OFF
Lock Up: ON

Except Lock Up: OFFu
SPD (SP2)
Counter Gear Speed display/
min.: 0 km/h (0 mph)
max.: 255 km/h (158 mph)
Vehicle stopped: 0 km/h (0 mph)u
AT FLUID TEMP
ATF Temp. Sensor No. 1 Value/
min.: -40C (-40F)
max.: 215C (419F)80C (176F)
(After Stall Test)
If the value is º-40C (-40F)º or
º215C (419F)º, ATF temp. sen-
sor No. 1 circuit is opened or
shorted.
5. ACTIVE TEST
HINT:
Performing the ACTIVE TEST using the Hand-held tester allows the relay, VSV, actuator and so on to oper-
ate without parts removal. Performing the ACTIVE TEST as a first step of troubleshooting is one method
to shorten labor time.
It is possible to display the DATA LIST during the ACTIVE TEST.
(a) Warm up the engine.
(b) Turn the ignition switch OFF.
(c) Connect the Hand-held tester to the DLC3.
(d) Turn the ignition switch ON.
(e) Push the ºONº button of Hand-held tester.
(f) Select the item º/DIAGNOSIS/ENHANCED OBD ll/ACTIVE TESTº.
(g) According to the display on tester, perform the ºACTIVE TESTº.
ItemTest DetailsDiagnostic Note
SHIFT
[Test Details]
Operate the shift solenoid valve and set the each shift position by your-
self.
[Vehicle Condition]
Less than 50 km/h (31 mph)
[Others]

Press " button: Shift up

Press u button: Shift downPossible to check the operation of
the shift solenoid values.
HINT:
Shifting to the 5th gear is possible
only when the vehicle stops or idle
is ON.
LOCK UP
[Test Details]
Control the shift solenoid SLU to set the ATM to the lock-up condition.
[Vehicle Condition]
Vehicle Speed: 58 km/h (36 mph) or more
Possible to check the SLU opera-
tion.
LINE PRESS UP
[Test Details]
Operate the shift solenoid SLT and raise the line pressure.
[Vehicle Condition]

Vehicle Stopped.

IDL: ON
[Others]
ON: Line pressure up.
OFF: No action (normal operation)
-

DI-368
- DIAGNOSTICSAUTOMATIC TRANSMISSION
561 Author
: Date
:
AFSAir fuel ratio sensor
O2 sensorHeater oxygen sensor
Oxygen sensor pumping current circuitOxygen sensor output signal
Oxygen sensor reference ground circuitOxygen sensor signal ground
Accel position sensorAccelerator pedal position sensor
Throttle actuator control motor, Actuator control motor, Elec-
tronic throttle motor, Throttle control motorElectronic throttle actuator
Electronic throttle control system, Throttle actuator control
systemElectronic throttle control system
Throttle/pedal position sensor, Throttle/pedal position switch,
Throttle position sensor/switchThrottle position sensor
Turbo press sensorTurbocharger pressure sensor
Turbo VSVTurbocharger pressure control solenoid valve
P/S pressure switchPower-steering pressure switch
VSV for ACMActive control engine mount
Speed sensor, Vehicle speed sensor ºAº, Speed sensor for
skid control ECUVehicle speed sensor
ATF temperature sensor, Trans. fluid temp. sensor, ATF
temperature sensor ºAºTransmission fluid temperature sensor
Electronic controlled automatic transmission, ECTElectronically controlled automatic
Intermediate shaft speed sensor ºAºCounter gear speed sensor
Output speed sensorOutput 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

DI-376
- DIAGNOSTICSAUTOMATIC TRANSMISSION
569 Author
: Date
:
14. 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 and R positions.
NOTICE:

Do the test at normal operating fluid temperature 70 to 80 °C (158 to 176 °F).

Do not continuously run this test longer than 5 seconds.

To ensure safety, conduct 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 an OBD II scan tool or hand-held tester to DLC3.
(3) Fully apply the parking brake.
(4) Keep your left foot pressing firmly on the brake pedal.
(5) Start the engine.
(6) Shift into the D position. Press all the way down on the accelerator pedal with your right foot.
Quickly read the stall speed at this time.
Stall speed: 2,150 ± 150 rpm
(7) Do the same test in R position.
Stall speed: 2,150 ± 150 rpm
Evaluation:
ProblemPossible cause
(a) Engine stall speed low in D and R positions

Engine 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) Engine stall speed high in D position

Line pressure too low

Clutch No. 1 (C
1) slipping

One-way clutch No.3 (F
3) not operating properly
(c) Engine stall speed high in R position

Line pressure too low

Brake No. 4 (B
4) slipping

Clutch No. 3 (C
3) slipping

One-way clutch No.1 (F
1) not operating properly
(d) Engine stall speed high in D and R positions
Line pressure too low

Improper fluid level

- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-377
570 Author
: Date
:
(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 clutch and brake.
NOTICE:

Do the test at normal operating fluid temperature 70 to 80 °C (158 to 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 (In N position and air conditioner OFF): 700 ± 50 rpm.
(3) Shift the shift lever from 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
(4) 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

Line pressure too low

Clutch No. 1 (C
1) worn

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

Line pressure too low

Clutch No. 3 (C
3) worn

Brake No. 4 (B
4) worn

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

D12745
SST
SST
DI-378
- DIAGNOSTICSAUTOMATIC TRANSMISSION
571 Author
: Date
:
15. HYDRAULIC TEST
Measure the line pressure.
NOTICE:

Do the test at normal operation fluid temperature 70
to 80°C (158 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 doing the test.

Be careful to prevent SST's 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.
(2) Remove the test plug on the transmission case cen-
ter right side and connect SST.
SST 09992-00095 (09992-00231, 09992-00271)
(3) Fully apply the parking brake and chock the 4
wheels.
(4) Start the engine and check idling speed.
(5) Keep your left foot pressing firmly on the brake ped-
al and shift into D position.
(6) Measure the line pressure when the engine is idling.
(7) Depress the accelerator pedal all the way down.
Quickly read the highest line pressure when engine
speed reaches stall speed.
(8) In the same manner, do the test in R position.
Specified line pressure:
ConditionD position kPa (kgf/cm2
, psi)R position kPa (kgf/cm2, psi)
Idling362 to 420 (3.7 to 4.2, 53 to 59)500 to 580 (5.1 to 5.9, 73 to 84)
Stall1,360 to 1,460 (13.8 to 14.9, 196 to 212)1,295 to 1,415 (13.2 to 14.4, 188 to 205)
Evaluation
ProblemPossible cause
If the measured value at all positions are higher
Shift solenoid valve SLT defective

Regulator valve defective
If the measured value at all positions are lower

Shift solenoid valve SLT defective

Regulator valve defective

Oil pump defective
If pressure is low in the D position only
D position circuit fluid leakage

Clutch No. 1 (C
1) defective
If pressure is low in the R position only

R position circuit fluid leakage

Clutch No. 3 (C
3) defective

Brake No. 4 (B
4) defective

- DIAGNOSTICSENGINE
DI-19
212 Author
: Date
:
Idle air control valveIdle speed control
VSV for CCV, Canister close valve VSV for canister controlEvaporative emissions canister vent valve
VSV for EVAP, Vacuum switching valve assembly No. 1,
EVAP VSV, Purge VSVEvaporative emissions canister purge valve
VSV for pressure switching valve, Bypass VSVEvaporative emission pressure switching valve
Vapor pressure sensor, EVAP pressure sensor, Evaporative
emission control system pressure sensorFuel tank pressure sensor
Charcoal canisterEvaporative emissions canister
ORVR systemOn-board refueling vapor recovery system
Intake manifold runner controlIntake manifold tuning system
Intake manifold runner valve, IMRV, IACV (runner valve)Intake manifold tuning valve
Intake control VSVIntake manifold tuning solenoid valve
AFSAir fuel ratio sensor
O2 sensorHeater oxygen sensor
Oxygen sensor pumping current circuitOxygen sensor output signal
Oxygen sensor reference ground circuitOxygen sensor signal ground
Accel position sensorAccelerator pedal position sensor
Throttle actuator control motor, Actuator control motor, Elec-
tronic throttle motor, Throttle control motorElectronic throttle actuator
Electronic throttle control system, Throttle actuator control
systemElectronic throttle control system
Throttle/pedal position sensor, Throttle/pedal position switch,
Throttle position sensor/switchThrottle position sensor
Turbo press sensorTurbocharger pressure sensor
Turbo VSVTurbocharger pressure control solenoid valve
P/S pressure switchPower-steering pressure switch
VSV for ACMActive control engine mount
Speed sensor, Vehicle speed sensor ºAº, Speed sensor for
skid control ECUVehicle speed sensor
ATF temperature sensor, Trans. fluid temp. sensor, ATF
temperature sensor ºAºTransmission fluid temperature sensor
Electronic controlled automatic transmission, ECTElectronically controlled automatic
Intermediate shaft speed sensor ºAºCounter gear speed sensor
Output speed sensorOutput 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 immobiliser system, Immobiliser systemVehicle anti-theft system

2004 LAND CRUISER (EWD548U)
234VSC
1. ABS Operation
If the brake pedal is depressed suddenly, the ABS controls the hydraulic pressure of the wheel cylinders for all the four
wheels to automatically avoid wheel locking and ensure the directional and steering stability of the vehicle. If the brake pedal
is depressed suddenly, the ABS & BA & TRAC & VSC ECU controls the solenoids in the actuators using the signals from the
sensors to move the brake fluid to the reservoir in order to release the braking pressure applied to the wheel cylinder. If the
ABS & BA & TRAC & VSC ECU detects that the fluid pressure in the wheel cylinder is insufficient, the ECU controls the
solenoids in the actuators to increase the braking pressure.
2. Traction Control Operation
The traction control system controls the engine torque, the hydraulic pressure of the driving wheel cylinders, slipping of the
wheels which may occur at start or acceleration of the vehicle, to ensure an optimal driving power and vehicle stability
corresponding to the road conditions.
3. VSC Operation
Unexpected road conditions, vehicle speed, emergency situation, and any other external factors may cause large under- or
over-steering of the vehicle. If this occurs, the VSC system automatically controls the engine power and wheel brakes to
reduce the under- or over-steering.
To reduce large over-steering :
If the VSC system determines that the over-steering is large, it activates the brakes for the outer turning wheels depending
on the degree of the over-steering to produce the moment toward the outside of the vehicle and reduce the over-steering.
To reduce large under-steering :
If the VSC system determines that the under-steering is large, it controls the engine power and activates the rear wheel
brakes to reduce the under-steering.
VSC indicator light
If an error occurs in the VSC system, the VSC indicator lights up to warn the driver.
4. Traction Mode and VSC Function
When the center differential of the transfer is locked, the VSC function is turned off. At this time, the VSC OFF indicator light
in the combination meter will come on, and informs the driver that the VSC function is OFF.
5. Mutual System Control
To efficiently operate the VSC system at its optimal level, the VSC system and other control systems are mutually controlled
while the VSC system is being operated.
Engine throttle control
The engine power does not interfere with the VSC brake control by controlling the opening of the throttle and reducing the
engine output.
Engine control and electronically controlled transmission control
The strong braking force does not interfere with the braking force control of the VSC system by turning off the accel. and
reducing changes in the driving torque at shift-down.
VSC system operation indication
The slip indicator light flashes and the buzzer sounds intermittently to warn the driver that the current road is slippery, while
the VSC system is being operated.
6. Fail Safe Function
If an error occurs in the ABS & BA & TRAC & VSC ECU, sensor signals, and/or actuators, the ABS & BA & TRAC & VSC
ECU inhibits the brake actuator control and inputs the error signal to the engine control module. According to the error signal,
the brake actuator turns off the solenoid and the engine control module rejects any electronically controlled throttle open
request from the VSC system. As a result, the vehicle functions without the ABS, BA, TRAC, and VSC systems.
System Outline