TOYOTA SEQUOIA 2001 Service Repair Manual

D14166
ECM:
E8E7E6E5E4
S2
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±649
843 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 ± 10 (S2) ± Body ground11 to 15 W
NG Repair or replace the harness or connector
(See page IN±35).
OK
Replace the ECM (See page SF±80).

D11992
(+) (±)
Shift Solenoid Valve S2:
DI±650
± DIAGNOSTICSAUTOMATIC TRANSMISSION
844 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check shift solenoid valve S2.
PREPARATION:
Remove the shift solenoid valve S2 (See page AT±10).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionSpecified Condition
20C (68F)
Solenoid Connector (S2) ± Solenoid
Body (S2)11 to 15 W
CHECK:
Connect the positive (+) lead to the terminal of the solenoid con-
nector, and the negative (±) lead to the solenoid body.
OK:
The solenoid makes an operating sound.

NG Replace the shift solenoid valve S2
(See page AT±10).
OK
Repair or replace the transmission wire
(See page AT±7).

± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±651
845 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P0985 Shift Solenoid ºEº Control Circuit Low
(Shift Solenoid Valve SR)
DTC P0986 Shift Solenoid ºEº Control Circuit High
(Shift Solenoid Valve SR)
CIRCUIT DESCRIPTION
Shifting from 1st to 5th is performed in combination with ºONº and ºOFFº operation of the shift solenoid valves
SL1, SL2, S1, S2 and SR which are controlled by the ECM. If an open or short circuit occurs in either of the
shift solenoid valves, the ECM controls the remaining normal shift solenoid valves to allow the vehicle to be
operated smoothly (See page DI±567).
DTC No.DTC Detection ConditionTrouble Area
P0985ECM detects short in solenoid valve SR circuit 2 times when
solenoid valve SR is operated (1±trip detection logic)
Short in shift solenoid valve SR circuit

Shift solenoid valve SR

ECM
P0986ECM detects open in solenoid valve SR circuit 2 times when
solenoid valve SR is not operated (1±trip detection logic)
Open in shift solenoid valve SR circuit

Shift solenoid valve SR

ECM
MONITOR DESCRIPTION
These DTCs indicate an open or short in the shift solenoid valve SR circuit. When there is an open or short
circuit in any shift solenoid valve circuit, the ECM detects the problem and illuminates the MIL and stores
the DTC. When the shift solenoid valve SR is on, if resistance is 8 W or less, the ECM determines there is
a short in the shift solenoid valve SR circuit.
When the shift solenoid valve SR is off, if resistance is 100 kW or more, the ECM determines there is an open
in the shift solenoid valve SR circuit (See page DI±567).
MONITOR STRATEGY
RltdDTCP0985Shift solenoid valve SR/Range check (Low resistance)Related DTCsP0986Shift solenoid valve SR/Range check (High resistance)
Required sensors/ComponentsShift solenoid valve SR
Frequency of operationContinuous
Duration0.064 sec.
MIL operationImmediate
Sequence of operationNone
DIDJK±01

D14170
E1
Electronically Controlled
Transmission SolenoidECM
9
E7SR
7 SB
G±R
SR+B
CPU
DI±652
± DIAGNOSTICSAUTOMATIC TRANSMISSION
846 Author: Date:
2005 SEQUOIA (RM1146U)
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever these
DTCs are not present.See page DI±545
Range check (Low resistance)
Shift solenoid valve SRON
Battery voltage8 V or more±
Ignition switchON
StarterOFF
Range check (High resistance)
Shift solenoid valve SROFF
Battery voltage8 V or more±
Ignition switchON
StarterOFF
TYPICAL MALFUNCTION THRESHOLDS
Detection criteriaThreshold
Range check (Low resistance)
Shift solenoid valve SR resistance8 W or less
Range check (High resistance)
Shift solenoid valve SR resistance100 kW or more
COMPONENT OPERATING RANGE
ParameterStandard value
Shift solenoid valve SRResistance: 11 to 15 at 20°C (68°F)
WIRING DIAGRAM

ECM command gearshift
Shift solenoid valve SR1st 2nd 3rd 4th 5th
OFF OFF ONOFF OFF
1
152 3 4 5 6 7 8
9 10 11 12
13 14
D11994
Transmission Wire Side:
(Connector Front View):
E1
SR
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±653
847 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
HINT:

The shift solenoid valve SR is turned on/off normally when the shift lever is in the D position:
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)
7 ± Body ground11 to 15 W
NG Go to step 3.
OK

D14166
ECM:
E8E7E6E5E4
SR
DI±654
± DIAGNOSTICSAUTOMATIC TRANSMISSION
848 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check harness and connector (Transmission wire ± ECM)
PREPARATION:
(a) Connect the transmission wire connector.
(b) Disconnect the connector of the ECM.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionSpecified Condition
20C (68F)
E7 ± 9 (SR) ± Body ground11 to 15 W
NG Repair or replace the harness or connector
(See page IN±35).
OK
Replace the ECM (See page SF±80).

D11993
(+)
(±)
Shift Solenoid Valve SR:
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±655
849 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check shift solenoid valve SR.
PREPARATION:
Remove the shift solenoid valve SR (See page AT±10).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionSpecified Condition
20C (68F)
Solenoid Connector (SR) ± Solenoid
Body (SR)11 to 15 W
CHECK:
Connect the battery positive lead to the solenoid connector ter-
minal and the battery negative lead to the solenoid body
ground.
OK:
Solenoid sounds an operation noise.

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

D14171
Line Pressure
Control Pressure
Current Flow to Solenoid
D14172
ON
OFF
1 cycle
D14173
DI±656
± DIAGNOSTICSAUTOMATIC TRANSMISSION
850 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P2714 Pressure Control Solenoid ºDº Performance
(Shift Solenoid Valve SLT)
SYSTEM DESCRIPTION
The linear solenoid valve (SLT) controls the transmission line
pressure for smooth transmission operation based on signals
from the throttle position sensor and the vehicle speed sensor.
The ECM adjusts the duty cycle of the SLT solenoid valve to
control hydraulic line pressure coming from the primary regula-
tor valve. Appropriate line pressure assures smooth shifting
with varying engine outputs.
(*): Duty Ratio
The duty ratio is the ratio of the period of continuity in one cycle.
For example, if A is the period of continuity in one cycle, and B
is the period of non±continuity, then
Duty Ratio = A/(A + B) x 100 (%)
DTC No.DTC Detection ConditionTrouble Area
P2714
ECM detects a malfunction on SLT (ON side) according to the
revolution difference of the turbine and the output shaft, and
also by the oil pressure. (2±trip detection logic)
Shift solenoid valve SLT remains open or closed

Valve body is blocked

Automatic transmission (clutch, brake or gear, etc.)
MONITOR DESCRIPTION
The ECM calculates the amount of heat absorbed by the friction material based on the difference in revolu-
tion (clutch slippage) between the turbine and output shaft. The ECM turns on the MIL and outputs this DTC
when the amount of heat absorption exceeds the specified value.
When the shift solenoid valve SLT remains on, oil pressure goes down and clutch engagement force de-
creases.
NOTE: If you continue driving under these conditions, the clutch will burn out and the vehicle will no longer
be drivable.
DIDJL±01

± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±657
851 Author: Date:
2005 SEQUOIA (RM1146U)
MONITOR STRATEGY
Related DTCsP2714Shift solenoid valve SLT/ON malfunction
MainShift solenoid valve SLT
Required sensors/ComponentsSubValve body, ATF temperature sensor, Speed sensor (NT), Speed sensor
(NO)
Frequency of operationContinuous
DurationImmediate
MIL operation2 driving cycles
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
All:
Turbine speed sensor circuitNot circuit malfunction
Output speed sensor circuitNot circuit malfunction
Transmission Fluid Temperature Sensor
circuitNot circuit malfunction
Shift solenoid valve S1 circuitNot circuit malfunction
Shift solenoid valve S2 circuitNot circuit malfunction
Shift solenoid valve SR circuitNot circuit malfunction
Shift solenoid valve SL1 circuitNot circuit malfunction
Shift solenoid valve SL2 circuitNot circuit malfunction
Shift solenoid valve SLT circuitNot circuit malfunction
ECT (Engine coolant temperature) sensor
circuitNot circuit malfunction
KCS sensor circuitNot circuit malfunction
ETCS (Electric throttle control system)Not system down
Transmission rangeºDº
ECT40°C (104°F) or more±
Spark advance from Max. retard timing by
KCS control0° CA or more±
EngineStarting
Transfer rangeºHIGHº*1
TFT (transmission fluid temperature)10°C or more±
Transfer range ºHIGHº *1 (This condition is applied only 4WD)
*1 Following conditions met
Vehicle speed sensor circuitNot circuit malfunction
Output shaft speed sensor circuitNot circuit malfunction
Transfer output speed143 rpm or more±
NO/NOtf (Transfer input speed/Transfer
output speed)0.9 to 1.1

D14174
ECM
SLT+
SLT± E713
12 B±R
G±Y E1 Electronically Controlled
Transmission Solenoid
E7 G
GR14
6 SLT+
SLT±+B DI±658
± DIAGNOSTICSAUTOMATIC TRANSMISSION
852 Author: Date:
2005 SEQUOIA (RM1146U)
TYPICAL MALFUNCTION THRESHOLDS
Detection criteriaThreshold
Summation of C1 clutch heat generations
= R (Turbine speed ± Output speed x Temporary ratio)Specified value
WIRING DIAGRAM