check transmission fluid TOYOTA HIGHLANDER 2001 Service User Guide

05-928- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)
111 8 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
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 (Automatic Transmission Fluid) temperature sensor converts the fluid temperature into a resistance
value which is input into the ECM.
The ECM applies a voltage to the temperature sensor through ECM terminal THO1 (THO).
The sensor resistance changes with the transmission fluid temperature. As the temperature becomes high-
er, the sensor resistance decreases.
One terminal of the sensor is grounded so that the sensor resistance decreases and the voltage goes down
as the temperature becomes higher.
The ECM calculates the fluid temperature based on the voltage signal.
DTC No.DTC Detection 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 circuit

Transmission wire (ATF temperature sensor)

ECM
P0712ATF temperature sensor resistance is less than 79 W for 0.5
sec. or more (1-trip detection logic)
Short in ATF temperature sensor circuit

Transmission wire (ATF temperature sensor)

ECM
P0713
ATF temperature sensor resistance is more than 156 kW when
15 minutes or more after the engine start
DTC is detected for 0.5 sec. or more (1-trip detection logic)
Open in ATF temperature sensor circuit

Transmission wire (ATF temperature sensor)

ECM
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.
0527N-31

- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)05-929
111 9 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
MONITOR STRATEGY
Related DTCs
P0710: ATF temperature sensor/Range check (Fluttering)
P0712: ATF temperature sensor/Range check (Low resistance)
P0713: ATF temperature sensor/Range check (High resistance)
Required sensors/ComponentsATF temperature sensor (TFT sensor)
Frequency of operationContinuous
Duration0.5 sec.
MIL operationImmediate
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
P0710: Range check (Fluttering)
P0712: Range check (Low resistance)
The monitor will run whenever these DTCs are not present.See page 05-895
The typical enabling condition is not available.-
P0713: Range check (High resistance)
The monitor will run whenever this DTC is not present.See page 05-895
Time after engine start15 min. or more
TYPICAL MALFUNCTION THRESHOLDS
P0710: Range check (Fluttering)
TFT (transmission fluid temperature) sensor
Less than 79 W
or
More than 156 kW
P0712: Range check (Low resistance)
TFT (transmission fluid temperature) sensorLess than 79 W
P0713: Range check (High resistance)
TFT (transmission fluid temperature) sensorMore than 156 kW
COMPONENT OPERATING RANGE
TFT (transmission fluid temperature)Atmospheric temperature - approx. 130C (266F)

C54864
THO
E2 Transmission Wire Side:
(Connector Front View):
E10
- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)05-931
1121 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
HINT:
According to the DATA LIST displayed by the OBD II 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 the 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 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) When you use hand-held tester:
Select the item ºDIAGNOSIS/ENHANCED OBD II/DATA LISTº.
(g) According to the display on tester, read the ºDATA LISTº.
ItemMeasurement Item/
Range (display)Normal Condition
AT FLUID TEMP
ATF Temp. Sensor Value/
min.: -40C (-40F)
max.: 215C (419F)
Approx. 80C (176F) (After Stall Test)
HINT:
When DTC P0712 is output and OBD II scan tool or hand-held tester output is 150C (302F), there is a
short circuit.
When DTC P0713 is output and OBD II scan tool or hand-held tester output is -40C (-40F), there is an
open circuit.
Measure the resistance between terminal THO1 (THO) and body ground.
Temperature DisplayedMalfunction
-40°C (-40°F)Open circuit
150°C (302°F) or moreShort circuit
1 INSPECT TRANSMISSION WIRE(ATF TEMPERATURE SENSOR)
(a) Disconnect the transmission wire connector from the
transaxle.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
1 (THO) - 6 (E2)79 W to 156 kW
(c) Measure the resistance according to the value(s) in the
table below.
Standard (Check for short):
Tester ConnectionSpecified Condition
1 (THO) - Body ground10 kW or higher
6 (E2) - Body ground=
NG REPAIR OR REPLACE TRANSMISSION WIRE
(SEE PAGE 40-34)
OK

- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)05-933
1123 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC P0711 TRANSMISSION FLUID TEMPERATURE
SENSOR ºAº PERFORMANCE
CIRCUIT DESCRIPTION
The ATF (Automatic Transmission Fluid) temperature sensor converts the fluid temperature into a resistance
value which is input into the ECM.
DTC No.DTC Detection ConditionTrouble Area
P0711
Both (a) and (b) are detected: (2-trip detection logic)
(a) Intake air and engine coolant temperatures are more than
-10°C (14F) at engine start
(b) After normal driving for over 18 min. and 9 km (6 mile) or
more, ATF temp. is less than 10°C (50F)

Open or short in ATF temperature sensor circuit

Transmission wire (ATF temperature sensor)

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 DTCsP0711: ATF temperature sensor/Rationality check
Required sensors/ComponentsATF temperature sensor (TFT sensor)
Frequency of operationContinuous
Duration3 sec.
MIL operation2 driving cycles
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
The monitor will run whenever this DTC is not present.See page 05-895
Time after engine start16 min.and 40 sec. or more
ECT (Engine coolant temperature)-15C (5F) or more
TFT (transmission fluid temperature) sensor circuitNot circuit malfunction
ECT sensor circuitNot circuit malfunction
IAT (Intake air temperature) sensor circuitNot circuit malfunction
Time after engine start18 min. and 20 sec.
Driving distance after engine start9 km/h (5.6 mph)
IAT (12 sec. after engine start)-10C (14F) or more
ECT (12 sec. after engine start)-10C (14F) or more
TYPICAL MALFUNCTION THRESHOLDS
TFT (transmission fluid temperature)Less than 10C (50F)
COMPONENT OPERATING RANGE
TFT (transmission fluid temperature)Atmospheric temperature - approx. 130C (266F)
05F3A-05

05-936- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)
1126 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
1 CHECK OTHER DTCS OUTPUT(IN ADDITION TO DTC P0711)
(a) Connect the OBD II scan tool or the hand-held tester to the DLC3.
(b) Turn the ignition switch to the ON position and push the OBD II scan tool or the hand-held tester main
switch ON.
(c) When you use hand-held tester:
Select the item ºDIAGNOSIS/ENHANCED OBD II/DTC INFO/CURRENT CODESº.
(d) 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 05-920)
A
2 CHECK TRANSAXLE FLUID LEVEL (SEE PAGE 40-2)
OK:
Automatic transaxle fluid level is correct.
NG ADD FLUID
OK
REPLACE TRANSMISSION WIRE (SEE PAGE 40-34)

05F2V-05
- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)05-887
1077 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
ROAD TEST
1. PROBLEM SYMPTOM CONFIRMATION
(a) Based on the result of the customer problem analysis, try to reproduce the symptoms. If the problem
is that the transaxle does not shift up, shift down, or the shift point is too high or too low, conduct the
following road test referring to the automatic shift schedule and simulate the problem symptoms.
2. ROAD TEST
NOTICE:
Perform the test at the ATF (Automatic Transmission Fluid) temperature 50 to 80°C (122 to 176°F) in
the normal operation.
(a) D position test:
Shift into the D position and fully depress the accelerator pedal and check the following points.
(1) Check up-shift operation.
Check that 1 " 2, 2 " 3 and 3 " O/D up-shifts take place, and that the shift points conform to
the automatic shift schedule (see page 03-51).
HINT:
O/D Gear Up-shift Prohibition Control

Engine coolant temperature is 60 °C (140 °F) or less and vehicle speed is at 70 km/h (43 mph) or less.

ATF temperature is 10 °C (50 °F) or less.
O/D Gear Lock-up Prohibition Control

Brake pedal is depressed.

Accelerator pedal is released.

Engine coolant temperature is 60 °C (140 °F) or less.
(2) Check for shift shock and slip.
Check for shock and slip at the 1 " 2, 2 " 3 and 3 " O/D up-shifts.
(3) Check for abnormal noise and vibration.
Check for abnormal noise and vibration when up-shifting from 1 " 2, 2 " 3 and 3 " O/D while
driving with the shift lever in the D position, and check while driving in the lock-up condition.
HINT:
The check for the cause of abnormal noise and vibration must be done thoroughly as it could also be due
to loss of balance in the differential, torque converter clutch, etc.
(4) Check kick-down operation.
Check vehicle speeds when the 2nd to 1st, 3rd to 2nd and O/D to 3rd kick-downs take place
while driving with the shift lever in the D position. Confirm that each speed is within the applicable
vehicle speed range indicated in the automatic shift schedule (see page 03-51).
(5) Check abnormal shock and slip at kick-down.
(6) Check the lock-up mechanism.

Drive in D position (O/D gear), at a steady speed (lock-up ON).

Lightly depress the accelerator pedal and check that the engine speed does not change
abruptly.
HINT:

There is no lock-up function in the 1st and 2nd gear.

If there is a big jump in engine speed, there is no lock-up.

9900X-21
99-4
- MAINTENANCEUNDER HOOD
3784 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
UNDER HOOD
GENERAL MAINTENANCE
1. GENERAL NOTES

Maintenance items may vary from country to country. Check the owner's manual supplement in which
the maintenance schedule is shown.

Every service item in the periodic maintenance schedule must be performed.

Periodic maintenance service must be performed according to whichever interval in the periodic main-
tenance schedule occurs first, the odometer reading (miles) or the time interval (months).

Maintenance service after the last period should be performed at the same interval as before unless
noted.

Failure to do even one of the items can cause the engine to run poorly and/or increase the exhaust
emissions.
2. WINDSHIELD WASHER FLUID
(a) Check that there is sufficient fluid in the tank.
3. ENGINE COOLANT LEVEL
(a) Check that the coolant level is between the LEVEL lines on the see-through reservoir at normal tem-
perature (20°C (68°F)).
4. RADIATOR AND HOSES
(a) Check that the front of the radiator is clean and not blocked by leaves, dirt or bugs.
(b) Check the hoses for cracks, kinks, rot or loose connections.
5. BATTERY ELECTROLYTE LEVEL
(a) Check the indicator.
(b) Check that the electrolyte level of all the battery cells is between the upper and lower level lines on
the case.
6. BRAKE FLUID LEVEL
(a) Check that the brake fluid levels are near the upper level line on the see-through reservoirs.
7. ENGINE DRIVE BELT
(a) Check the drive belt for fraying, cracks, wear or oiliness.
8. ENGINE OIL LEVEL
(a) Check the level on the dipstick with the engine turned off.
9. POWER STEERING FLUID LEVEL
(a) Check the level on the dipstick.
(b) The level should be in the ºHOTº or ºCOLDº range depending on the fluid temperature.
10. AUTOMATIC TRANSMISSION FLUID LEVEL
(a) Park the vehicle on a level surface.
(b) With the engine idling and the parking brake applied, shift the selector into all the positions from ºPº
to ºLº, and then shift into the ºPº position.
(c) Pull out the dipstick and wipe off the fluid with a clean shop rag. Re-insert the dipstick and check that
the fluid level is in the ºHOTº range.
(d) Perform this check with the fluid at the normal driving temperature (70 to 80°C, 158 to 176°F).
HINT:
Wait until the engine cools down (approx. 30 min.) before checking the fluid level after extended driving at
high speed, in hot weather, in heavy traffic or after pulling a trailer.
11. EXHAUST SYSTEM
(a) Visually inspect for cracks, holes or loose supports.
If any change in the sound of the exhaust or the smell of the exhaust fumes is noticed, locate and correct
the cause.

010QO-02
- INTRODUCTIONTERMS
01-41
41 Author
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
TERMS
ABBREVIATIONS USED IN MANUAL
AbbreviationsMeaning
ABSAnti-Lock Brake System
A/CAir Conditioner
ACAlternating Current
ACCAccessory
ACISAcoustic Control Induction System
ACSDAutomatic Cold Start Device
A.D.D.Automatic Disconnecting Differential
A/FAir-Fuel Ratio
AHCActive Height Control Suspension
ALRAutomatic Locking Retractor
ALTAlternator
AMPAmplifier
ANTAntenna
Approx.Approximately
ASSYAssembly
A/T, ATMAutomatic Transmission
AT FAutomatic Transmission Fluid
AUTOAutomatic
AUXAuxiliary
AV GAverage
AV SAdaptive Variable Suspension
B+Battery Voltage
BABrake Assist
BACSBoost Altitude Compensation System
BATBattery
BDCBottom Dead Center
B/LBi-Level
B/SBore-Stroke Ratio
BTDCBefore Top Dead Center
BVSVBimetallic Vacuum Switching Valve
CANController Area Network
CBCircuit Breaker
CCoCatalytic Converter For Oxidation
CDCompact Disc
CFCornering Force
CGCenter Of Gravity
CHChannel
CKDComplete Knock Down
COMB.Combination
CPECoupe
CPSCombustion Pressure Sensor
CPUCentral Processing Unit
CRSChild Restraint System
CTRCenter
C/VCheck Valve
CVControl Valve
CWCurb Weight
DCDirect Current