2001 TOYOTA SEQUOIA Service Repair Manual

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Page 785 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual A67628A67628D14156
Acceptable
Resistance
Te m p .
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±583
777 Author: Date:
2005 SEQUOIA (RM1146U)
CIRCUIT DESCRIPTION
The ATF (Automatic Transmission Fluid) t

A67628A67628D14156
Acceptable
Resistance
Te m p .
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±583
777 Author: Date:
2005 SEQUOIA (RM1146U)
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.
The sensor resistance changes with the transmission fluid tem-
perature. As the temperature becomes higher, the sensor resis-
tance decreases.
One terminal of the sensor is grounded so that the sensor resis-
tance decreases and the voltage goes down as the tempera-
ture becomes higher.
The ECM calculates the fluid temperature based on the voltage
signal.
DTC No.DTC Detection ConditionTrouble Area
P0710
(a) and (b) are detected momentarily within 0.5 sec. when
neither P0712 nor P0713 is detected (1±trip detection logic)
(a) ATF temperature sensor No.1 resistance is less than 79 W.
(b) ATF temperature sensor No.1 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
Transmission wire (ATF temperature sensor No.1)
ECM
P0712ATF temperature sensor No.1 resistance is less than 79 W for
0.5 sec. or more (1±trip detection logic)Short in ATF temperature sensor No.1 circuit
Transmission wire (ATF temperature sensor No.1)
ECM
P0713
ATF temperature No.1 sensor resistance is more than 156 kW
when 15 minutes or more have elapsed after the engine start
DTC is detected for 0.5 sec. or more (1±trip detection logic)Open in ATF temperature sensor No.1 circuit
Transmission wire (ATF temperature sensor No.1)
ECM
MONITOR DESCRIPTION
These DTCs indicate an open or short in the automatic transmission fluid (ATF) temperature sensor circuit.
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
open or short in the ATF temperature circuit. If the resistance value of the ATF temperature is less than 79W
*1
or more than 156kW*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.

Page 786 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual DI±584
± DIAGNOSTICSAUTOMATIC TRANSMISSION
778 Author: Date:
2005 SEQUOIA (RM1146U)
MONITOR STRATEGY
P0710ATF temperature sensor/Range check (Fluttering)
Related DTCsP0712ATF temperature sensor/

Page 787 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual D14157
O E1 Electronically Controlled
Transmission Solenoid
OT±O
OT+
L
OT2±L
OT2+ G±W
G±W
G±WG
B±L
G±W 2
110
9E7
E7
E828 32 24
THO2 THO1
E2ECM
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±585
779

Page 788 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual 1
152 3 4 5 6 7 8
9 10 11 12
13 14
D11994OT+OT±
E1
Transmission Wire Side:
(Connector Front View):
DI±586
± DIAGNOSTICSAUTOMATIC TRANSMISSION
780 Author: Date:
2005 SEQUOIA (RM1146U)
1 Inspect

Page 789 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual D14161
E8E7E6E5E4ECM:
THO1
E2
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±587
781 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check harness and connector (Transmission wire ± ECM).
PREPARATION:
(a) Conne

Page 790 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual DI±588
± DIAGNOSTICSAUTOMATIC TRANSMISSION
782 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P0711 Transmission Fluid Temperature Sensor ºAº
Performance
CIRCUIT DESCRIPTION
See page DI±582.
DTC No

DI±588
± DIAGNOSTICSAUTOMATIC TRANSMISSION
782 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P0711 Transmission Fluid Temperature Sensor ºAº
Performance
CIRCUIT DESCRIPTION
See page DI±582.
DTC No.DTC Detection ConditionTrouble Area
P0711
Both (a) and (b) are detected: (2±trip detection logic)
(a) Intake air and engine coolant temps. are more than ±20°C
(±4F) at engine start
(b) After normal driving for over 22 min. and 9 km (6 mile) or
more, ATF temp. is less than 10°C (50F)
Transmission wire (ATF temperature sensor No.1)
MONITOR DESCRIPTION
This DTC indicates that there is a problem with output from the automatic transmission fluid (ATF) tempera-
ture sensor and that the sensor itself is defective. The ATF temperature sensor converts the ATF tempera-
ture to an electrical resistance value. Based on the resistance, the ECM determines the ATF temperature
and detects an open or short in the ATF temperature circuit or a fault in the ATF temperature sensor.
After running the vehicle for a certain period, the ATF temperature should increase. If the ATF temperature
is below 20C (68F) after running the vehicle for a certain period, the ECM interprets this as a fault, and
turns on the MIL.
MONITOR STRATEGY
Related DTCsP0711ATF 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
ItSpecificationItemMinimumMaximum
The monitor will run whenever this DTC is
not present.See page DI±545
TFT (transmission fluid temperature) sen-
sor circuitNot circuit malfunction
ECT (Engine coolant temperature) sensor
circuitNot circuit malfunction
IAT (Intake air temperature) sensor circuitNot circuit malfunction
Time after engine start21 min. and 40 sec.
Driving distance after engine start9 km (5.6 mile) or more±
IAT (12 sec. after engine start)±10°C (14°F) or more±
ECT (12 sec. after engine start)±10°C (14°F) or more±
DIDJ7±01

Page 791 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual ± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±589
783 Author: Date:
2005 SEQUOIA (RM1146U)
TYPICAL MALFUNCTION THRESHOLDS
Detection criteriaThreshold
TFT (transmission fluid temperature)Less than 20°C

Page 792 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual DI±590
± DIAGNOSTICSAUTOMATIC TRANSMISSION
784 Author: Date:
2005 SEQUOIA (RM1146U)
1 Check other DTCs output (in addition to DTC P0711).
PREPARATION:
(a) Turn the ignition switch off.
(b) Conne

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