TOYOTA SEQUOIA 2001 Service Repair Manual

± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±659
853 Author: Date:
2005 SEQUOIA (RM1146U)
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) Turn on the 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
LINE PRESS UP *
[Test Details]
Operate the shift solenoid SLT and raise the line pressure.
[Vehicle Condition]

Vehicle Stopped.

IDL: ON
[HINT]
OFF: Line pressure up (When the active test of ºControl the Line Pres-
sure Upº is performed, the ECM commands the SLT solenoid to turn
off).
ON: No action (normal operation)
±
*: ºLINE PRESS UPº in the ACTIVE TEST is performed to check the line pressure changes by connecting
the SST to the automatic transaxle, which is used in the HYDRAULIC TEST (See page DI±540) as well.
HINT:

The pressure values in ACTIVE TEST and HYDRAULIC TEST are different from each other.

Normally, the line pressure detected in the ACTIVE TEST is approximately half of the value detected
in the HYDRAULIC TEST's stall test.

DI±660
± DIAGNOSTICSAUTOMATIC TRANSMISSION
854 Author: Date:
2005 SEQUOIA (RM1146U)
1 Check other DTCs output (in addition to DTC P2714).
PREPARATION:
(a) Turn the ignition switch off.
(b) Connect the OBD II scan tool or hand±held tester to the DLC3.
(c) Turn the ignition switch to the ON position.
(d) Turn on the tester.
(e) 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 ºP2714º is outputA
ºP2714º and other DTCsB
HINT:
If any other codes besides ºP2714º are output, perform troubleshooting for those DTCs first.
B Go to DTC chart (See page DI±573).
A

D11987
2
1
(+)
(±) Shift Solenoid Valve SLT:
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±661
855 Author: Date:
2005 SEQUOIA (RM1146U)
2 Inspect shift solenoid valve SLT operation.
PREPARATION:
Remove the shift solenoid valve SLT (See page AT±10).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionSpecified Condition
20C (68F)
1 ± 25.0 to 5.6 W
CHECK:
Connect the positive (+) lead with a 21 W bulb to terminal 2 and
the negative (±) lead to terminal 1 of the solenoid valve connec-
tor, then check the movement of the valve.
OK:
The solenoid makes an operating sound.
NG Replace the shift solenoid valve SLT
(See page AT±10).
OK
3 Inspect valve body (See page AT±10).
OK:
There are no foreign objects on each valve.
NG Repair or replace valve body.
OK
Repair or replace transmission (See page
AT±25).

DI±662
± DIAGNOSTICSAUTOMATIC TRANSMISSION
856 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P2716 Pressure Control Solenoid ºDº Electrical
(Shift Solenoid Valve SLT)
CIRCUIT DESCRIPTION
See page DI±656
DTC No.DTC Detection ConditionTrouble Area
P2716Open or short is detected in shift solenoid valve SLT circuit for
1 second or more while driving (1±trip detection logic).
Open or short in shift solenoid valve SLT circuit

Shift solenoid valve SLT

ECM
MONITOR DESCRIPTION
When an open or short in the linear solenoid valve (SLT) circuit is detected, the ECM interprets this as a fault.
The ECM will turn on the MIL and store the DTC.
MONITOR STRATEGY
Related DTCsP2716Shift solenoid valve SLT/Range check
Required sensors/ComponentsShift solenoid valve SLT
Frequency of operationContinuous
Duration1 sec.
MIL operationImmediate
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever this DTC is
not present.See page DI±545
Solenoid current cut statusNot cut
Battery voltage11 V or more±
CPU command duty ratio to SLT19% or more±
Ignition switchON
StarterOFF
TYPICAL MALFUNCTION THRESHOLDS
Detection criteriaThreshold
Solenoid status from ICFail (Open or short)
COMPONENT OPERATING RANGE
ParameterStandard value
Output signal dutyLess than 100%
DIDJM±01

D14174
ECM
SLT+
SLT± E713
12 B±R
G±Y E1 Electronically Controlled
Transmission Solenoid
E7 G
GR14
6 SLT+
SLT±+B
1
152 3 4 5 6 7 8
9 10 11 12
13 14
D11994
Transmission Wire Side:
(Connector Front View):
E1
SLT±
SLT+
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±663
857 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check transmission wire.
PREPARATION:
Disconnect the transmission wire connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionSpecified Condition
20C (68F)
14 (SLT+) ± 6 (SLT±)5.0 to 5.6 W
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionSpecified Condition
14 (SLT+) ± Body ground10 kW or higher
6 (SLT±) ± Body ground=
NG Go to step 3.
OK

D14166
ECM:
SLT+
SLT±E8E7E6E5E4
DI±664
± DIAGNOSTICSAUTOMATIC TRANSMISSION
858 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check harness and connector (Transmission wire ± ECM)
PREPARATION:
(a) Connect the transmission wire connector.
(b) Disconnect the ECM connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionSpecified Condition
20C (68F)
E7 ± 13 (SLT+) ± E7 ± 12 (SLT±)5.0 to 5.6 W
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionSpecified Condition
E7 ± 13 (SLT+) ± Body ground10 kW or higher
E7 ± 12 (SLT±) ± Body ground=
NG Repair or replace the harness or connector
(See page IN±35).
OK
Replace the ECM (See page SF±80).

D11987
2
1
(+)
(±) Shift Solenoid Valve SLT:
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±665
859 Author: Date:
2005 SEQUOIA (RM1146U)
3 Inspect shift solenoid valve SLT.
PREPARATION:
Remove the shift solenoid valve SLT (See page AT±10).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionSpecified Condition
20C (68F)
1 ± 25.0 to 5.6 W
CHECK:
Connect the positive (+) lead with a 21 W bulb to terminal 2 and
the negative (±) lead to terminal 1 of the solenoid valve connec-
tor, then check the movement of the valve.
OK:
The solenoid makes an operating sound.

NG Replace the shift solenoid valve SLT
(See page AT±10).
OK
Repair or replace the transmission wire
(See page AT±7).

DI±666
± DIAGNOSTICSAUTOMATIC TRANSMISSION
860 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P2740 Transmission Fluid Temperature Sensor ºBº
Circuit
DTC P2742 Transmission Fluid Temperature Sensor ºBº
Circuit Low Input
DTC P2743 Transmission Fluid Temperature Sensor ºBº
Circuit High Input
CIRCUIT DESCRIPTION
ATF (Automatic Transmission Fluid) temperature sensor No.2 is on the transmission and just in front of the
oil cooler inlet pipeline.
If ECM detects the abnormally high temperature of ATF by this sensor, it draws driver's attention by illuminat-
ing the warning lamp.
HINT:

The temperature of ATF easily rises when towing, climbing hills and in traffic, etc.

If the ATF temperature sensor No.2 becomes short±circuited, the signal that indicates the ATF temper-
ature is 150C (302F) or higher is input in ECM.
Vehicle conditions when the sensor is normal and when the sensor is short±circuited are indicated
in the table below.
ATF temperature Sensor No.2
StateDetection ConditionSymptomRecovery Condition

AT fluid temp. more than 150C
(302F).
AT Oil Temp. warning light re-
mains on
AT fluid temp. less than 135C
(275F). *2

AT fluid temp. more than 130C
(266F).
Shift point too high.
AT fluid temp. less than 110C
(230F).
Sensor is normalWhen the conditions (a) and (b)
are satisfied.
(a) AT fluid temp. more than 130C
(266F).
(b) Engine coolant temp. more
than 95C (203F).

Lock±up at 3rd gear. *1
AT fluid temp. less than 110C
(230F) *2 and engine coolant
temp. less than 95C (203F).
Sensor is short±circuited

Any conditions.

AT Oil Temp. warning light re-
mains on

Shift point too high.

Symptoms still occur
Sensor is short circuited

Engine coolant temp. more than
95C (203F).
Lock±up at 3rd gear. *1
Symptoms still occur
HINT:
*1: When AT fluid temperature is normal, transmission locks up at 5th gear with the shift lever in D position
and at 4th gear with the shift lever in 4 position.
*2: When AT fluid temperature is in normal range, it decreases to less than 135C (275F) within 5 minutes
with the shift lever in P or N position in an idling state.
DIDJN±01

± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±667
861 Author: Date:
2005 SEQUOIA (RM1146U)DTC No.
DTC Detecting ConditionTrouble Area
P2740
(a) and (b) are detected momentarily within 0.5 sec. when
neither P2742 nor P2743 is detected (1±trip detection logic)
(a) ATF temperature sensor No.2 resistance is less than 25 W
(0.046 V)
(b) ATF temperature sensor No.2 resistance is more than 156
kW (4.915 V)
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.2 circuit

Transmission wire (ATF temperature sensor No.2)

ECM
P2742ATF temperature sensor No.2 resistance is less than 25 W
(0.046 V) for 0.5 sec. or more (1±trip detection logic)
Short in ATF temperature sensor No.2 circuit

Transmission wire (ATF temperature sensor No.2)

ECM
P2743
ATF temperature No.2 sensor resistance is more than 156 kW
(4.915 V) 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 No.2 circuit

Transmission wire (ATF temperature sensor No.2)

ECM
MONITOR DESCRIPTION
The Automatic Transmission Fluid (ATF) temperature sensor converts ATF temperature to an electrical re-
sistance value. Based on the resistance, the ECM determines the ATF temperature, and the ECM detects
an open or short in the AFT temperature circuit. If the resistance value of the ATF temperature is less than
25 W (0.046 V) or more than 156 kW (4.915 V), the ECM interprets this as a fault in the ATF sensor or wiring.
The ECM will turn on the MIL and store the DTC.
MONITOR STRATEGY
P2740ATF temperature sensor/Range check (Fluttering)
Related DTCsP2742ATF temperature sensor/Range check (Low voltage)Related DTCs
P2743ATF temperature sensor/Range check (High voltage)
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 voltage)
The typical enabling condition is not avail-
able.±
Range check (High voltage)
Time after engine start15 min. or more±

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 DI±668
± DIAGNOSTICSAUTOMATIC TRANSMISSION
862 Author: Date:
2005 SEQUOIA (RM1146U)
TYPICAL MALFUNCTION THRESHOLDS
Detection criteriaThreshold
Range check (Fluttering)
TFT (transmission fluid temperature) sensor voltage
Less than 0.046 V
or
More than 4.915 V
Range check (Low voltage)
TFT (transmission fluid temperature) sensor voltageLess than 0.046 V
Range check (High voltage)
TFT (transmission fluid temperature) sensor voltageMore than 4.915 V
COMPONENT OPERATING RANGE
ParameterStandard value
TFT (transmission fluid temperature) sensorAtmospheric temperature to approx. 130°C (266°F)
WIRING DIAGRAM