O2 sensor TOYOTA SEQUOIA 2001 Service Repair Manual

DIDJ4±01
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±573
767 Author: Date:
2005 SEQUOIA (RM1146U)
DIAGNOSTIC TROUBLE CODE CHART
If a DTC is displayed during the DTC check, check the parts listed in the table below and proceed to the page
given.
HINT:
*1 :
... The MIL (Malfunction Indicator Lamp) lights up
*2 :  ... The ECM memorizes the trouble code if the ECM detects the DTC detection condition.
This DTC may be output when the clutch, brake and gear components etc. inside the automatic trans-
mission are damaged.
DTC No.
(See Page)Detection ItemTrouble AreaMIL *1Memory *2
P0500
(DI±278)Vehicle Speed Sensor ºAº
Open or short in speed sensor (SP2) circuit
Speed sensor (SP2)
ECM


P0705
(DI±576)Transmission Range Sensor Cir-
cuit Malfunction (PRNDL Input)Open or short in park/neutral position switch circuit
Park/neutral position switch
ECM


P0710
(DI±582)Transmission Fluid Temperature
Sensor ºAº CircuitOpen or short in ATF temperature sensor No.1 circuit
Transmission wire (ATF temperature sensor No.1)
ECM


P0711
(DI±588)Transmission Fluid Temperature
Sensor ºAº PerformanceTransmission wire (ATF temperature sensor No.1)

P0712
(DI±582)Transmission Fluid Temperature
Sensor ºAº Circuit Low InputShort in ATF temperature sensor No.1 circuit
Transmission wire (ATF temperature sensor No.1)
ECM


P0713
(DI±582)Transmission Fluid Temperature
Sensor ºAº Circuit High InputOpen in ATF temperature sensor No.1 circuit
Transmission wire (ATF temperature sensor No.1)
ECM


P0717
(DI±591)Input Speed Sensor Circuit No
Signal
Open or short in speed sensor (NT) circuit
Speed sensor (NT)
ECM
Automatic transmission (clutch, brake or gear, etc.)


P0722
(DI±596)Output Speed Sensor Circuit No
Signal
Open or short in speed sensor (SP2) circuit
Speed sensor (SP2)
ECM
Automatic transmission (clutch, brake or gear, etc.)


P0724
(DI±600)Brake Switch ºBº Circuit High
Short in stop light switch signal circuit
Stop light switch
ECM


P0748
(DI±603)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±608)Shift Solenoid ºAº Performance
(Shift Solenoid Valve S1)Shift solenoid valve S1 remains open or closed
Valve body is blocked
Automatic transmission (clutch, brake or gear, etc.)


P0756
(DI±614)Shift Solenoid ºBº Performance
(Shift Solenoid Valve S2)Shift solenoid valve S2 remains open or closed
Valve body is blocked
Automatic transmission (clutch, brake or gear, etc.)


P0771
(DI±620)Shift Solenoid ºEº Performance
(Shift Solenoid Valve SR)
Shift solenoid valve SR remains open or closed
Shift solenoid valve SL1 remains open or closed
Valve body is blocked
Automatic transmission (clutch, brake or gear, etc.)



DI±574
± DIAGNOSTICSAUTOMATIC TRANSMISSION
768 Author: Date:
2005 SEQUOIA (RM1146U)P0776
(DI±625)
Pressure Control Solenoid ºBº
Performance
(Shift Solenoid Valve SL2)Shift solenoid valve SL2 remains open or closed
Valve body is blocked
Automatic transmission (clutch, brake or gear, etc.)


P0778
(DI±631)Pressure Control Solenoid ºBº
Electrical
(Shift Solenoid Valve SL2)Open or short in shift solenoid valve SL2 circuit
Shift solenoid valve SL2
ECM


P0781
(DI±636)1±2 Shift (1 ±2 Shift Valve)Valve body is blocked up or stuck (1±2 shift valve)
Automatic transmission (clutch, brake or gear, etc.)

P0973
(DI±641)Shift Solenoid ºAº Control Circuit
Low (Shift Solenoid Valve S1)Short in shift solenoid valve S1 circuit
Shift solenoid valve S1
ECM


P0974
(DI±641)Shift Solenoid ºAº Control Circuit
High (Shift Solenoid Valve S1)Open in shift solenoid valve S1 circuit
Shift solenoid valve S1
ECM


P0976
(DI±646)Shift Solenoid ºBº Control Circuit
Low (Shift Solenoid Valve S2)Short in shift solenoid valve S2 circuit
Shift solenoid valve S2
ECM


P0977
(DI±646)Shift Solenoid ºBº Control Circuit
High (Shift Solenoid Valve S2)Open in shift solenoid valve S2 circuit
Shift solenoid valve S2
ECM


P0985
(DI±651)Shift Solenoid ºEº Control Circuit
Low (Shift Solenoid Valve SR)Short in shift solenoid valve SR circuit
Shift solenoid valve SR
ECM


P0986
(DI±651)Shift Solenoid ºEº Control Circuit
High (Shift Solenoid Valve SR)Open in shift solenoid valve SR circuit
Shift solenoid valve SR
ECM


P2714
(DI±656)Pressure Control Solenoid ºDº
Performance
(Shift Solenoid Valve SLT)Shift solenoid valve SLT remains open or closed
Valve body is blocked
Automatic transmission (clutch, brake or gear, etc.)


P2716
(DI±662)Pressure Control Solenoid ºDº
Electrical
(Shift Solenoid Valve SLT)Open or short in shift solenoid valve SLT circuit
Shift solenoid valve SLT
ECM


P2740
(DI±666)Transmission Fluid Temperature
Sensor ºBº CircuitOpen or short in ATF temperature sensor No.2 circuit
Transmission wire (ATF temperature sensor No.2)
ECM


P2742
(DI±666)Transmission Fluid Temperature
Sensor ºBº Circuit Low InputShort in ATF temperature sensor No.2 circuit
Transmission wire (ATF temperature sensor No.2)
ECM


P2743
(DI±666)Transmission Fluid Temperature
Sensor ºBº Circuit High InputOpen in ATF temperature sensor No.2 circuit
Transmission wire (ATF temperature sensor No.2)
ECM


P2757
(DI±672)
Torque Converter Clutch Pres-
sure Control Solenoid Perfor-
mance
(Shift Solenoid Valve SLU)Shift solenoid valve SLU remains open or closed
Valve body is blocked
Torque converter clutch
Automatic transmission (clutch, brake or gear, etc.)
Line pressure is too low


P2759
(DI±680)
Torque Converter Clutch Pres-
sure Control Solenoid Control
Circuit Electrical
(Shift Solenoid Valve SLU)Open or short in shift solenoid valve SLU circuit
Shift solenoid valve SLU
ECM



DIDJ5±01
DI±576
± DIAGNOSTICSAUTOMATIC TRANSMISSION
770 Author: Date:
2005 SEQUOIA (RM1146U)
CIRCUIT INSPECTION
DTC P0705 Transmission Range Sensor Circuit Mal-
function (PRNDL Input)
CIRCUIT DESCRIPTION
The park/neutral position switch detects the shift lever position and sends signals to the ECM.
DTC No.DTC Detection ConditionTrouble Area
P0705
(2±trip detection logic)

All switches are OFF simultaneously for NSW, R, N, D, 3 and
2 positions.

2 or more switches are ON simultaneously for NSW, R, D, 3
and 2 positions.

Open or short in park/neutral position switch circuit

Park/neutral position switch

ECM
MONITOR DESCRIPTION
These DTCs indicate a problem with the park/neutral position switch and the wire harness in the park/neutral
position switch circuit.
The park/neutral position switch detects the shift lever position and sends a signal to the ECM.
For security, the park/neutral position switch detects the shift lever position so that engine can be started
only when the shift lever is in the P or N position.
The park/neutral position switch sends a signal to the ECM according to the shift position (NSW, R, D, 3 or
2).
The ECM determines that there is a problem with the switch or related parts if it receives more than 1 position
signal simultaneously. The ECM will turn on the MIL and store the DTC.
MONITOR STRATEGY
Related DTCsP0705Park/neutral position switch/Verify switch input
Required sensors/ComponentsPark/neutral position switch
Frequency of operationContinuous
DtiCondition (A)2 sec.DurationCondition (B)60 sec.
MIL operation2 driving cycle
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever this DTC is
not present.See page DI±545
Ignition switchON
Battery voltage10.5 V or more

± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±579
773 Author: Date:
2005 SEQUOIA (RM1146U)
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 the hand±held tester:
Select the item ºDIAGNOSIS / ENHANCED OBD II / DATA LISTº.
(g) According to the display on the tester, read the ºDATA LISTº.
ItemMeasurement Item/
Range (display)Normal ConditionDiagnostic Note
PNP SW [NSW]PNP SW Status/
ON or OFFShift lever position is;
P and N: ON
Except P and N: OFF
When the shift lever position dis-
played on the hand±held tester dif-
fers from the actual position, ad-
justment of the PNP switch or the
shift cable may be incorrect.
LOWPNP SW Status/
ON or OFF

Shift lever position is 2: OFF
O

Shift position L switch Push: ON
O

Shift position L switch Push: OFF
=
2NDPNP SW Status/
ON or OFFShift lever position is;
2 and L: ON
Except 2 and L: OFF
=
3RDPNP SW Status/
ON or OFFShift lever position is;
3: ON
Except 3: OFF
=
DRIVEPNP SW Status/
ON or OFFShift lever position is;
D: ON
Except D: OFF
=
REVERSEPNP SW Status/
ON or OFFShift lever position is;
R: ON
Except R: OFF
=

DI±582
± DIAGNOSTICSAUTOMATIC TRANSMISSION
776 Author: Date:
2005 SEQUOIA (RM1146U)
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
DIDJ6±01

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.

DI±584
± DIAGNOSTICSAUTOMATIC TRANSMISSION
778 Author: Date:
2005 SEQUOIA (RM1146U)
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 (TFT sensor)
Frequency of operationContinuous
Duration0.5 sec.
MIL operationImmediate
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever these
DTCs are not present.See page DI±545
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)
TFT (transmission fluid temperature) sensor resistance
Less than 79 W
or
More than 156 kW
Range check (Low resistance)
TFT (transmission fluid temperature) sensor resistanceLess than 79 W
Range check (High resistance)
TFT (transmission fluid temperature) sensor resistanceMore than 156 kW
COMPONENT OPERATING RANGE
ParameterStandard value
TFT (transmission fluid temperature) sensorAtmospheric temperature to approx. 130°C (266°F)

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 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM
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 the hand±held tester:
Select the item ºDIAGNOSIS / ENHANCED OBD II / DATA LISTº.
(g) According to the display on the tester, read the ºDATA LISTº.
ItemMeasurement Item/
Range (display)Normal Condition
AT FLUID TEMP 1
ATF Temp. Sensor Value/
min.: ±40C (±40F)
max.: 215C (419F)
After Stall Test;
Approx. 80C (176F)

Equal to ambient temperature when cold soak
HINT:
When DTC P0712 is output and hand±held tester output is 150C (302F) or more, there is a short circuit.
When DTC P0713 is output and hand±held tester output is ±40C (±40F), there is an open circuit.
Measure the resistance between terminal THO1 (OT) 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.

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 transmission wire (ATF temperature sensor No.1).
PREPARATION:
Disconnect the transmission wire connector from the transmis-
sion.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionSpecified Condition
2 (OT±) ± 10 (OT+)79 W to 156 kW
2 (OT±) ± Body ground10 kW or higher
10 (OT+) ± Body ground10 kW or higher
HINT:
If the resistance is out of the specified range with either the ATF
temperature shown in the table below, the driveability of the ve-
hicle may decrease.
ATF TemperatureSpecified Condition
20°C (68°F)3 to 4 kW
110°C (230°F)0.22 to 0.28 kW
NG Repair or replace the transmission wire
(ATF temperature sensor No.1)
(See page AT±7).
OK

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