TOYOTA LAND CRUISER 1998 Factory Repair Manual

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

- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-41 1
604 Author
: Date
:
2004 LAND CRUISER (RM1071U)
MONITOR STRATEGY
P0710ATF temperature sensor/Range check (Fluttering)
Related DTCsP0712ATF temperature sensor/Range check (Low resistance)Related DTCs
P0713ATF 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 79 W
or
More than 156 kW
Range check (Low resistance)
ATF temperature sensor resistanceLess than 79 W
Range check (High resistance)
ATF temperature sensor resistanceMore than 156 kW
COMPONENT OPERATING RANGE
ParameterStandard value
ATF temperature sensor resistanceAtmospheric temperature to approx. 130°C (266°F)

D12759
Electronically Controlled
Transmission Solenoid
THO1
Y
1 2
E2ECM
4
28 E1
G-Y
11
10
9THO2
E5 E6E6
L
BR-W Y OO
G-Y
L
BR-W
If1 EB2EB2
OT+
OT2+ OT-
OT2-
EB3 BR-W BR-W BR-W
32432 DI-412
- DIAGNOSTICSAUTOMATIC TRANSMISSION
605 Author
: Date
:
2004 LAND CRUISER (RM1071U)
WIRING DIAGRAM

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

D12792
THO1
E2
E5E6E7E8E9
DI-414
- DIAGNOSTICSAUTOMATIC TRANSMISSION
607 Author
: Date
:
2004 LAND CRUISER (RM1071U)
2 Measure resistance between terminal THO1 and E2 of ECM connector.
PREPARATION:
(a) Connect the transmission wire connector.
(b) Disconnect the connector of the ECM.
CHECK:
Measure the resistance between terminals THO1 and E2.
OK:
79 W to 156 kW
CHECK:
Measure resistance between terminals THO1 and E2 of the
ECM connector and body ground.
OK:
Resistance: 1 MW or higher
NG Repair or replace the harness or connector
(See page IN-36).
OK
Check and replace the ECM (See page
IN-36).

- 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

DI-416
- DIAGNOSTICSAUTOMATIC TRANSMISSION
609 Author
: Date
:
2004 LAND CRUISER (RM1071U)
TYPICAL MALFUNCTION THRESHOLDS
Detection criteriaThreshold
ATF Temperature
Less than 10°C (50°F)
(ATF temperature = -10°C (14°F) at engine start)
(Conditions vary with ATF temperature at engine start)
COMPONENT OPERATING RANGE
ParameterStandard value
ATF temperature sensorAtmospheric temperature to approx. 130°C (266°F)
WIRING DIAGRAM
See page DI-410.
INSPECTION PROCEDURE
1 Check other DTCs output (in addition to DTC P0711).
PREPARATION:
(a) Warm up the engine.
(b) Turn the ignition switch off.
(c) Connect the OBD II scan tool or hand-held tester to the DLC3.
(d) Turn the ignition switch to the ON position.
(e) Push the ºONº button of the OBD II scan tool or the hand-held tester.
(f) Select the item ºDIAGNOSIS/ENHANCED OBD II/DTC INFO/CURRENT CODESº.
CHECK:
Read the DTCs using the OBD II scan tool or the hand-held tester.
RESULT:
Display (DTC output)Proceed to
Only ºP0711º is outputA
ºP0711º and other DTCsB
HINT:
If any other codes besides ºP0711º is output, perform the troubleshooting for those DTCs first.
B Go to relevant DTC chart (See page DI-389).
A

- 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).

D05982
Drum
Speed Sensor NT
DI-418
- DIAGNOSTICSAUTOMATIC TRANSMISSION
611 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC P0717 Input Speed Sensor Circuit No Signal
CIRCUIT DESCRIPTION
The speed sensor NT detects the rotation speed of the input
shaft from the rotation of the drum. Its construction is the same
as that of the speed sensor SP2.
By comparing the speed sensor NT signal and speed sensor
SP2 signal, the ECM detects the shift timing of the gears and
appropriately controls the engine torque and hydraulic pres-
sure in response to various conditions, thus providing smooth
gear shift.
DTC No.DTC Detection ConditionTrouble Area
P0717
All conditions below are detected for 5 secs. or more
(1-trip detection logic)
(a) Gear change not being performed
(b) Gear position: 1st, 2nd, 3rd, 4th or 5th
(c) T/M input shaft rpm: 300 rpm or less
(d) T/M output shaft rpm: 1,000 rpm or more
(e) Park/neutral position switch: OFF
(f) Shift solenoid valves, park/neutral posotion switch and ve-
hicle speed sensor are in normal operation

Open or short in speed sensor NT circuit

Speed sensor NT

ECM

Automatic transmission assembly
MONITOR DESCRIPTION
The input speed sensor detects the transmission input shaft speed. The ECM determines the gear shift tim-
ing based on a comparison of the input speed sensor (input shaft speed) with the output speed sensor (out-
put shaft speed).
When the output shaft speed is higher then the expected value and the input shaft speed is 300 rpm or less
while running with the shift in the D position, the ECM will conclude that there is malfunction of the input tur-
bine speed sensor (NT). The ECM will illuminate the MIL and a DTC is set.
MONITOR STRATEGY
Related DTCsP0717Speed sensor (NT)/Verify pulse input
Rid /C tMainSpeed sensor (NT)Required sensors/ComponentsSubSpeed sensor (NO)
Frequency of operationContinuous
Duration5 sec.
MIL operationImmediate
Sequence of operationNone
DIB35-02

D12760
NT+
NT-WL
E635 E627
1
2 T17 Turbine Speed Sensor
WL
EB2
EB25 10ECM
- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-419
612 Author
: Date
:
2004 LAND CRUISER (RM1071U)
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever the follow-
ing DTCs are not present.See page DI-361
Shift changeShift change is completed and before starting next shift change operation
Transmission Shift position4th or 5th
Output shaft rpm1,000 rpm or more-
NSW switchOFF
R switchOFF
L switchOFF
EngineRunning
TYPICAL MALFUNCTION THRESHOLDS
Detection criteriaThreshold
Sensor signal rpmLess than 300 rpm
COMPONENT OPERATING RANGE
ParameterStandard value
Speed sensor (NT)Input speed is equal to engine speed when lock-up ON.
WIRING DIAGRAM