engine TOYOTA HIGHLANDER 2001 Service Repair Manual

- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)05-933
1123 Author
: Date
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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

- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)05-935
1125 Author
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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
HINT:
If a circuit related to the ATF temperature sensor becomes open, P0713 is immediately set (in 0.5 second).
When P0713 is set, P0711 cannot be detected.
It is not necessary to inspect the circuit when P0711 is set.

05-944- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)
1134 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC P0741 TORQUE CONVERTER CLUTCH SOLENOID
PERFORMANCE (SHIFT SOLENOID VALVE
DSL)
SYSTEM DESCRIPTION
The ECM uses the signals from the throttle position sensor, Air-flow meter, turbine (input) speed sensor,
intermediate (counter) shaft speed sensor and crankshaft position sensor to monitor the engagement condi-
tion 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 a mechanical problems of the shift solenoid valve DSL, valve body and torque con-
verter clutch.
DTC No.DTC Detection ConditionTrouble Area
P0741
Lock-up does not occur when driving in lock-up range (normal
driving at 85 km/h [53 mph]), or lock-up remains ON in lock-
up OFF range (2-trip detection logic)

Shift solenoid valve DSL remains open or closed

Valve body is blocked

Shift solenoid valve DSL

Torque converter clutch

Automatic transaxle (clutch, brake or gear etc.)

Line pressure is too low

ECM
MONITOR DESCRIPTION
Torque converter lock-up is controlled by the ECM based on speed sensor (NT), speed sensor (NC), engine
rpm, engine load, engine temperature, vehicle speed, transmission temperature, and gear selection. The
ECM determines the lock-up status of the torque converter by comparing the engine rpm (NE) to the input
turbine rpm (NT). The ECM calculates the actual transmission gear by comparing input turbine rpm (NT) to
counter gear rpm (NC). When conditions are appropriate, the ECM requests ºlock-upº by applying control
voltage to shift solenoid DSL. When the DSL is turned on, solenoid DSL applies pressure to the lock-up relay
valve and locks the torque converter clutch.
If the ECM detects no lock-up after lock-up has been requested or if it detects lock-up when it is not re-
quested, the ECM interprets this as a fault in the shift solenoid valve DSL or lock-up system performance.
The ECM will turn on the MIL and store the DTC.
Example:
When any of the following is met, the system judges it as a malfunction.
(a) There is a difference in rotation between before and after torque converters even when the ECM com-
mands lock-up.
(Engine speed is at least 75 rpm greater than input turbine speed.)
(b) There is no difference in rotation between before and after torque converters even when the ECM com-
mands lock-up off.
(The difference between engine speed and input turbine speed is less than 35 rpm.)
05F3F-05

- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)05-945
1135 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
MONITOR STRATEGY
Related DTCs
P0741:
Shift solenoid valve DSL/OFF malfunction
Shift solenoid valve DSL/ON malfunction
Required sensors/Components
Shift solenoid valve DSL, Speed sensor (NT), Speed sensor (NC),Crankshaft posi-
tion sensor (NE), Throttle position sensor (VPA1), Mass air flow sensor (MAF),
Transmission temperature sensor (THO1), Engine coolant temperature sensor
(ECT)
Frequency of operationContinuous
Duration
OFF malfunction
3.5 sec.
ON malfunction
1.8 sec.
MIL operation2 driving cycles
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ALL:
Transmission rangeºDº
ECT (Engine coolant temperature)60°C (140°F) or more
TFT (Transmission fluid temperature)-20C (-4F) or more
TFT sensor circuitNot circuit malfunction
ECT sensor circuitNot circuit malfunction
Turbine speed sensor circuitNot circuit malfunction
Intermediate shaft speed sensor circuitNot circuit malfunction
Output speed sensor circuitNot circuit malfunction
Shift solenoid valve SL1 circuitNot circuit malfunction
Shift solenoid valve SL2 circuitNot circuit malfunction
Shift solenoid valve S4 circuitNot circuit malfunction
Shift solenoid valve DSL circuitNot circuit malfunction
Electronic throttle systemNot circuit malfunction
OFF malfunction
ECM lock-up commandON
ECM selected gear3rd or 4th
Vehicle speed25 km/h (15.5 mph) or more
ON malfunction
ECM lock-up commandOFF
ECM selected gear3rd or 4th
Throttle valve opening angle8% or more
Vehicle speed25 to 60 km/h (15.5 to 37.2 mph)
TYPICAL MALFUNCTION THRESHOLDS
Either of the following conditions is met: OFF malfunction or ON malfunction
OFF malfunction
Engine speed - Input (turbine) speed100 rpm or more
ON malfunction
2 detections are necessary per driving cycle:
1st detection; temporary flag ON
2nd detection; pending fault code ON
Vehicle speed must be under 10 km/h (6.2 mph) once before 2nd detection
Diffierence between engine speed and input (turbine) speedLess than 35 rpm

G23400G29214
Accelerator Pedal
Opening Angle
Lock-up OFF
Lock-up ON
"time Engine Speed
Accelerator Pedal
Fully Released
05-946- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)
1136 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
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 the 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 to the ON position.
(e) Push the ºONº button of the hand-held tester.
(f) Select the item ºDIAGNOSIS/ENHANCED OBD II/ACTIVE TESTº.
(g) According to the display on tester, perform the ºACTIVE TESTº.
ItemTest DetailsDiagnostic Note
LOCK UP
[Test Details]
Control the shift solenoid DSL to set the automatic transaxle to the
lock-up condition.
[Vehicle Condition]
Vehicle Speed: 58 km/h (36 mph) or more
Possible to check the DSL opera-
tion.
HINT:

This test can be conducted when the vehicle speed is 58 km/h (36 mph) or more.

This test can be conducted with the 3rd or O/D gear.
(h) Lightly depress the accelerator pedal and check that the engine speed does not change abruptly.
HINT:

When changing the accelerator pedal opening angle while driving, if the engine speed does not
change, lock-up is on.

Slowly release, but not fully, the accelerator pedal in order to decelerate. (Fully releasing the pedal will
close the throttle valve and lock-up may be turned off.)

I30203
Radio Receiver Assy
BatteryR3ACC+B R34
BU+B
3
R3GND 7 IL1
IK320
2 4
2C 1
2I
V13
3A9
3I
AM1ACC3L
W
ALT
B
BR
IB 2
1C
1C63
1K
1
1A RAD No. 2
AM1
FL MAINGR
W
W1 2D.C.C
RAD No.1
I15
Ignition SW
F7 Fusible Link
BlockL-Y
LGL-B Standard type:
3
22
1 Engine Room J/B
Center J/B
Instrument Panel J/B 05-1634
- DIAGNOSTICSAUDIO SYSTEM
1824 Author
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
POWER SOURCE CIRCUIT (RADIO RECEIVER ASSY)
CIRCUIT DESCRIPTION
This circuit provides the power to the radio receiver assy.
WIRING DIAGRAM
05IRJ-01

I39184
JBL type:
Radio Receiver Assy Center J/B
Engine Room J/B
Instrument Panel J/BI15
Ignition SW
F7
Fusible Link BlockACC
B
GND
Battery FL MAINAM1 RAD No.2
ALT RAD No.1D.C.CL-BGR
L-B LG L-YV
W
BR L
W
B
WR4
R41 11
3K 103I9
3C4 3A 13
IL12
IK320
2C4
2I1
R420
3
ACC AM12
1C6 1C2
1A1 1K3
12
1 23
IB
- DIAGNOSTICSAUDIO SYSTEM
05-1635
1825 Author
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)

A82401
64 to 88 km/h
(40 to 55 mph)
64 to 80 km/h
(40 to 50 mph)
Warm up time
(idle speed)4 minutes 16 minutes Ignition Switch OFFIdling
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-27
217 Author
: Date
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
2. CATALYST MONITOR (A/F SENSOR TYPE)
(a) Preconditions
The monitor will not run unless:

The MIL is OFF.

Engine Coolant Temperature (ECT) is 75°C (167°F) or higher.

Intake Air Temperature (IAT) is -10°C (14°F) or higher.*
NOTICE:
* 2002 and later MY vehicles:
To complete the readiness test in cold ambient conditions (less than -10°C/14°F), turn the ignition
switch OFF and then back to ON. Perform the drive pattern a second time.
(b) Drive Pattern
(1) Connect the OBD II scan tool to the DLC3 to check readiness monitor status and preconditions
(refer to step (a)).
(2) Drive the vehicle at 40 to 55
mph (64 to 88 km/h) for approximately 4 minutes.
NOTICE:
Drive with smooth throttle operation and avoid sudden acceleration.
If IAT was less than 10°C (50°F) when the engine was started, drive the vehicle at 40 to 55 mph (64
to 88 km/h) for an additional 4 minutes.
(3) Drive the vehicle allowing speed to fluctuate between 40 to 50 mph (64 to 80 km/h) for about 16
minutes.
NOTICE:
Drive with smooth throttle operation and avoid sudden closure of the throttle.
(4) Check the status of the readiness monitor on the scan tool display. If the readiness monitor status
did not switch to complete, ensure preconditions are met, turn the ignition OFF, and then repeat
steps (2) and (3).

05-28
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
218 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
3. EVAP MONITOR (KEY-OFF MONITOR)
(a) Preconditions
The monitor will run when all of the following conditions are met:

The fuel level is less than 90 %.

The altitude is less than 8,000 ft. (2,450 m).

The vehicle is stopped.

The Engine Coolant Temperature (ECT) is between 4.4 and 35°C (40 to 95°F).

The Intake Air Temperature (IAT) is between 4.4 and 35°C (40 to 95 °F).
(b) Monitor condition
(1) Allow the engine to idle for 300 seconds or more.
(2) Turn the ignition switch OFF and wait for 6 hours.
(3) Connect the scan tool to the DLC3 to check the monitor status and the preconditions.
(4) Check the readiness monitor status.
If ºINCMPº is displayed , the monitor is not completed. Turn the ignition switch OFF, confirm the preconditions
and perform the monitor condition again.

A82400
112 km/h (70 mph)
(under 3200 rpm)
64 km/h (40 mph)
(over 1400 rpm)
40 km/h (25 mph)
(over 900 rpm)
Idling
Ignition Switch OFFOnce Twice 10 times
Over
2 minutesOver
150 secondsOver
40 secondsOver
40 secondsOver
40 seconds
Over
10 secondsOver
10 secondsOver
10 seconds
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-29
219 Author
: Date
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
4. OXYGEN / AIR FUEL RATIO SENSOR MONITOR (FRONT A/F SENSOR AND REAR O2S SYSTEM)
(a) Preconditions
The monitor will not run unless:
The MIL is OFF.
(b) Drive Pattern
(1) Connect the OBD II scan tool to the DLC3 to check monitor status and preconditions (refer to
step (a)).
(2) Start the engine and allow it to idle for 2 minutes or more.
(3) Drive the vehicle at 64 to 112 km/h (40 to 70 mph) for at least 150 seconds.
(4) Stop the vehicle and allow the engine to idle for 10 seconds or more.
(5) Drive the vehicle at 40 to 64 km/h (25 to 40 mph) for at least 40 seconds.
(6) Stop the vehicle and allow the engine to idle for 10 seconds or more.
(7) Perform steps (5) and (6) ten times.
(8) Check the readiness monitor status. If the readiness monitor status did not change to ºcompleteº,
check the preconditions, turn the ignition switch OFF, and repeat steps (1) to (6).