1998 TOYOTA LAND CRUISER automatic transmission fluid

DI-410
- DIAGNOSTICSAUTOMATIC TRANSMISSION
603 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC P0710 Transmission Fluid Temperature Sensor ºAº
Circuit
DTC P0712 Transmission Fluid Temperature Sensor ºAº
Circuit Low Input
DTC P0713 Transmission Fluid Temperature Sensor ºAº
Circuit High Input
CIRCUIT DESCRIPTION
The ATF temperature sensor converts fluid temperature into a resistance value which is input into the ECM.
DTC No.DTC Detecting ConditionTrouble Area
P0710
(a) and (b) is detected momentary within 0.5 sec. when neither
P0712 or P0713 is not detected (1-trip detection logic)
(a) ATF temperature sensor resistance is less than 79 W.
(b) ATF temperature sensor resistance is more than 156 kW.
HINT:
Within 0.5 sec. the malfunction switches from (a) to (b) or from
(b) to (a)

Open or short in ATF temperature sensor No. 1 circuit

ATF temperature sensor No. 1
P0712ATF temperature sensor resistance is less than 79 W. for 0.5
sec. or more (1-trip detection logic)
ECM
P0713
ATF temperature sensor resistance is more than 156 kW. 15
minutes or more after the engine start DTC is detected for 0.5
sec. or more (1-trip detection logic)
MONITOR DESCRIPTION
The automatic transmission fluid (ATF) temperature sensor converts ATF temperature to an electrical resis-
tance value. Based on the resistance, the ECM determines the ATF temperature, and the ECM detects an
opens or shorts in the ATF temperature circuit. If the resistance value of the ATF temperature is less than
79 W
*1 or more than 156 kW*2, the ECM interprets this as a fault in the ATF sensor or wiring. The ECM will
turn on the MIL and store the DTC.
*1: 150C (302F) or more is indicated regardless of the actual ATF temperature.
*2: -40C (-40F) is indicated regardless of the actual ATF temperature.
HINT:
The ATF temperature can be checked on the OBD II scan tool or hand-held tester display.
DIC2Z-01

1
152 3 4 5 6 7 8
9 10 11 12
13 14
D11994OT+OT-
- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-413
606 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
HINT:
According to the DATA LIST displayed by the OBD ll scan tool or Hand-held tester, you can read the value
of the switch, sensor, actuator and so on without parts removal. Reading the DATA LIST as a first step of
troubleshooting is one method to shorten labor time.
(a) Warm up the engine.
(b) Turn the ignition switch OFF.
(c) Connect the OBD ll scan tool or Hand-held tester to the DLC3.
(d) Turn the ignition switch ON.
(e) Push the ºONº button of OBD ll scan tool or Hand-held tester.
(f) Select the item º/DIAGNOSIS/ENHANCED OBD ll/DATA LIST/ALL (or ATM)º.
(g) According to the display on tester, read the ºDATA LISTº.
ItemMeasurement Item/
Display (Range)Normal ConditionDiagnostic Note
AT FLUID TEMP
ATF Temp. Sensor No.1 Value/
min.: -40°C (-40°F)
max.: 215°C (419°F)80°C (176°F)
(After Stall Test)
If the value is º-40°C (-40°F)º or
º215°C (419°F)º, ATF temp. sen-
sor No. 1 circuit is opened or
shorted.
HINT:
When DTC P0712 is output and OBD ll scan tool or hand-held tester output is 150°C (302°F), there is a
short circuit.
Measure the resistance between THO1 (THO) and body ground.
Temperature DisplayedMalfunction
-40°C (-40°F)Open circuit
150°C (302°F) or moreShort circuit
1 Check transmission wire.
PREPARATION:
Disconnect the transmission wire connector from the transmis-
sion.
CHECK:
Measure the resistance between terminals OT+ and OT-.
OK:
79 W to 156 kW
CHECK:
Measure resistance between terminals OT+ and OT- of the
transmission wire connector and body ground.
OK:
Resistance: 1 MW or higher
NG Replace the transmission wire (ATF tempera-
ture sensor).
OK

- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-415
608 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC P0711 Transmission Fluid Temperature Sensor ºAº
Performance
CIRCUIT DESCRIPTION
The ATF temperature sensor converts fluid temperature into a resistance value which is input into the ECM.
DTC No.DTC Detecting ConditionTrouble Area
P0711
(A) Both (a) and (b) are detected: (2-trip detection logic)
(a) Intake air and engine coolant temps. are more than -10°C
(14°F) at engine start
(b) After normal driving for over 20 min. and 9 km (6 mile) or
more, ATF temp. is less than 20°C (68°F)
(B) After 17 min. of engine start, the ATF temp. is 110°C
(230°F) or more (2-trip detection logic).

Open or short in ATF temperature sensor No. 1 circuit

ATF temperature sensor No. 1

ECM
MONITOR DESCRIPTION
The ATF temperature sensor converts the ATF temperature to an electrical resistance value. Based on the
resistance, the ECM determines the ATF temperature and detects an opens or shorts in the ATF temperature
circuit or a fault of the ATF temperature sensor.
After running the vehicle for a certain period, the ATF temperature should increase. If the ATF temperature
is below 10C (50F) after running the vehicle for a certain period, the ECM interprets this as a fault, and
turns on the MIL.
When the ATF temperature is 110C (230F) or more after 17 minutes of engine cold start, the ECM also
determines this as a fault, turns on the MIL, and stores the DTC.
MONITOR STRATEGY
Related DTCsP0711ATF temperature sensor/Rationality check
Required sensors/ComponentsATF temperature sensor
Frequency of operationContinuous
Duration3 sec.
MIL operation2 driving cycles
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever the follow-
ing DTCs are not present.See page DI-361
ATF Temperature sensor ºAº circuit
ECT (Engine coolant temperature) sensor
circuitThere is no malfunction in the circuit shown on the left.
IAT (Intake air temperature) sensor circuit
Time after engine start18 min. and 20 sec. or more-
ECT-15°C (5°F) or more-
Driving distance after engine start9 km (6 mile) or more-
IAT (12 sec. after engine start)-20°C (-4°F) or more-
ECT (12 sec. after engine start)-20°C (-4°F) or more-
DIC30-01

- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-417
610 Author
: Date
:
2004 LAND CRUISER (RM1071U)
2 Check transmission fluid level (See page DI-361).
NG Add fluid.
OK
Replace the transmission wire (ATF tempera-
ture sensor).

- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-477
670 Author
: Date
:
2004 LAND CRUISER (RM1071U)
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
[The following items are common to all conditions below: OFF malfunction (A) and (B)]
The monitor will run whenever the follow-
ing DTCs are not present.See page DI-361
Turbine speed sensor (NT) circuit
Output speed sensor (NO) circuit
Transmission Fluid Temperature Sensor
ºAº circuit
Shift solenoid ºAº (S1) circuit
Shift solenoid ºBº (S2) circuit
Shift solenoid ºEº (SR) circuitThere is no malfunction in the circuits shown on the left.
Pressure control solenoid ºAº (SL1) circuit
There is no malfunction in the circuits shown on the left.
Pressure control solenoid ºBº (SL2) circuit
Pressure control solenoid ºDº (SLT) circuit
ECT (Engine coolant temperature) sensor
circuit
KCS sensor circuit
ETCS (Electric throttle control system)Not system down
Transmission shift positionºDº
ECT40°C (104°F) or more-
Spark advance from Max. retard timing by
KCS control0° CA or more-
EngineRunning
Transfer rangeºHIGHº*1
ATF temperature10°C or more-
Transfer range ºHIGHº *1 (This condition is applied only 4WD)
*1 Following conditions met
Vehicle speed sensor ºAº circuitTh i lf ti i th i it h th l ft Output shaft speed sensor circuitThere is no malfunction in the circuits shown on the left.
Transfer output speed143 rpm or more-
NO/NOtf (Transfer input speed/Transfer
output speed)0.9 or moreLess than 1.1
TYPICAL MALFUNCTION THRESHOLDS
Detection criteriaThreshold
Summation of C1 clutch heat generations
= R (Turbine speed - Output speed x Temporary ratio)Specified value

- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-483
676 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC P2740 Transmission Fluid Temperature Sensor ºBº
Circuit
DTC P2742 Transmission Fluid Temperature Sensor ºBº
Circuit Low Input
DTC P2743 Transmission Fluid Temperature Sensor ºBº
Circuit High Input
CIRCUIT DESCRIPTION
The ATF temperature sensor converts fluid temperature into a resistance value which is input in to the ECM.
ATF temperature sensor No.2 is on the transmission and just before the oil cooler inlet pipeline.
If ECM detects the abnormally high temperature of ATF by this sensor, it draws driver's attention by illuminat-
ing the warning lamp.
HINT:

The temperature of ATF easily raises when towing, climbing hills and in traffic, etc.

If the ATF temperature sensor No.2 shorts, the signal that indicates the ATF temperature is 150C
(302F) or higher is input in ECM.
Vehicle conditions when sensor is in normal and when the vehicle is in short are indicated in the table
below.
ATF temperature No.2 Sensor
StateDetection ConditionSymptomRecovery Condition
Sensor is normal

AT fluid temp. more than 150C
(302F).
AT Oil Temp. warning light re-
mains on
AT fluid temp. less than 135C
(275F). *1
Sensor is normal
AT fluid temp. more than 130C
(266F).
Shift point too high.
AT fluid temp. less than 110C
(230F).
Sensor is in short
Any conditions.

AT Oil Temp. warning light re-
mains on

Shift point too high.

Symptoms still occur
HINT:
*1: When AT fluid temperature is in normal range, it decreases to less than 135C within 5 minutes with the
shift lever in P or N position in a idling state.
DTC No.DTC Detecting ConditionTrouble Area
P2740
(a) and (b) is detected momentary within 0.5 sec. when neither
P2742 or P2743 is not detected (1-trip detection logic)
(a) ATF temperature sensor resistance is less than 79 W.
(b) ATF temperature sensor resistance is more than 156 kW.
HINT:
Wthin 0.5 sec. the malfunction switches from (a) to (b) or from
(b) to (a)

Open or short in ATF temperature sensor No. 2 circuit

ATF temperature sensor No. 2
P2742ATF temperature sensor resistance is less than 79 W. for 0.5
sec. or more (1-trip detection logic)
ECM
P2743
DTC is detected for 0.5 sec. or more (1-trip detection logic)
ATF temperature sensor resistance is more than 156 kW. after
started engine for 15 minutes or more
DIC33-01

DI-484
- DIAGNOSTICSAUTOMATIC TRANSMISSION
677 Author
: Date
:
2004 LAND CRUISER (RM1071U)
MONITOR DESCRIPTION
The automatic transmission fluid (ATF) temperature sensor converts ATF temperature to an electrical resis-
tance value. Based on the resistance, the ECM determines the ATF temperature, and the ECM detects an
opens or shorts in the ATF temperature circuit. If the resistance value of the ATF temperature is less than
79 W or more than 156 kW, the ECM interprets this as a fault in the ATF sensor or wiring. The ECM will turn
on the MIL and store the DTC.
MONITOR STRATEGY
P2740ATF temperature sensor/Range check (Fluttering)
Related DTCsP2742ATF temperature sensor/Range check (Low resistance)Related DTCs
P2743ATF temperature sensor/Range check (High resistance)
Required sensors/ComponentsATF temperature sensor
Frequency of operationContinuous
Duration0.5 sec.
MIL operationImmediate
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever the follow-
ing DTCs are not present.See page DI-361
Range check (Fluttering, Low resistance)
The typical enabling condition is not avail-
able.-
Range check (High resistance)
Time after engine start15 min. or more-
TYPICAL MALFUNCTION THRESHOLDS
Detection criteriaThreshold
Range check (Fluttering)
ATF temperature sensor resistance
Less than 25 W
or
More than 156 kW
Range check (Low resistance)
ATF temperature sensor resistanceLess than 25 W
Range check (High resistance)
ATF temperature sensor resistanceMore than 156 kW
COMPONENT OPERATING RANGE
ParameterStandard value
ATF temperature sensorAtmospheric temperature to approx. 130°C (266°F)

DI3BQ-04
- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-389
582 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DIAGNOSTIC TROUBLE CODE CHART
If a DTC is displayed during the DTC check, check the circuit listed for that code in the table below and pro-
ceed to the page given.
*
1:
...MIL light up
DTC No.
(See Page)Detection ItemTrouble AreaMIL *1Memory
P0500
(DI-274)Vehicle Speed Sensor ºAº
Open or short in No. 1 vehicle speed sensor circuit
No. 1 vehicle speed sensor
Combination meter
ECM


P0705
(DI-402)Transmission Range Sensor Cir-
cuit Malfunction (PRNDL Input)Short in park/neutral position switch circuit
Park/neutral position switch
ECM


P0710
(DI-410)Transmission Fluid Temperature
Sensor ºAº CircuitOpen or short in ATF temperature sensor No.1 circuit
ATF temperature sensor No.1
ECM


P0711
(DI-415)Transmission Fluid Temperature
Sensor ºAº PerformanceATF temperature sensor No.1
ECM

P0712
(DI-410)Transmission Fluid Temperature
Sensor ºAº Circuit Low InputShort in ATF temperature sensor No.1 circuit
ATF temperature sensor No.1
ECM


P0713
(DI-410)Transmission Fluid Temperature
Sensor ºAº Circuit High InputOpen in ATF temperature sensor No.1 circuit
ATF temperature sensor No.1
ECM


P0717
(DI-418)Input Speed Sensor Circuit No
SignalOpen or short in speed sensor NT circuit
Speed sensor NT
ECM


P0722
(DI-421)Output Speed Sensor
Open or short in speed sensor SP2 circuit
Speed sensor SP2
ECM


P0724
(DI-424)Brake Switch ºBº Circuit High
Short in stop light switch circuit
Stop light switch
ECM


P0748
(DI-426)Pressure Control Solenoid ºAº
Electrical
(Shift Solenoid Valve SL1)Open or short in shift solenoid valve SL1 circuit
Shift solenoid valve SL1
ECM


P0751
(DI-433)Shift Solenoid ºAº Performance
(Shift Solenoid Valve S1)
Shift solenoid valve S1 is stuck open or closed
Valve body is blocked up or stuck
Shift solenoid valve S1
Automatic transmission assembly
ECM


P0756
(DI-437)Shift Solenoid ºBº Performance
(Shift Solenoid Valve S2)
Shift solenoid valve S2 is stuck open or closed
Valve body is blocked up or stuck
Shift solenoid valve S2
Automatic transmission assembly
ECM


P0771
(DI-441)Shift Solenoid ºEº Performance
(Shift Solenoid Valve SR)
Shift solenoid valve SR is stuck open or closed
Shift solenoid valve SL1 is stuck open or closed
Valve body is blocked up or stuck
Shift solenoid valve SR
Shift solenoid valve SL1
Automatic transmission assembly
ECM