2001 TOYOTA SEQUOIA solenoid

D12795
12
(±)(+)
12
Shift Solenoid Valve SL1:
DI±624
± DIAGNOSTICSAUTOMATIC TRANSMISSION
818 Author: Date:
2005 SEQUOIA (RM1146U)
3 Inspect shift solenoid valve SL1.
PREPARATION:
Remove the shift solenoid valve SL1 (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 SL1
(See page AT±10).
OK
4 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).

± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±625
819 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P0776 Pressure Control Solenoid ºBº Performance
(Shift Solenoid Valve SL2)
SYSTEM DESCRIPTION
The ECM uses signals from the output shaft speed sensor and input speed sensor to detect the actual gear
position (1st, 2nd, 3rd, 4th or 5th gear).
Then the ECM compares the actual gear with the shift schedule in the ECM memory to detect mechanical
problems of the shift solenoid valves, valve body or automatic transmission (clutch, brake or gear, etc.).
DTC No.DTC Detection ConditionTrouble Area
P0776The gear required by the ECM does not match the actual gear
when driving (2±trip detection logic)Shift solenoid valve SL2 remains open or closed
Valve body is blocked
Automatic transmission (clutch, brake or gear, etc.)
MONITOR DESCRIPTION
This DTC indicates ºstuck ON malfunctionº or ºstuck OFF malfunctionº of the shift solenoid valve SL2.
The ECM commands gear shifts by turning the shift solenoid valves ºON/OFFº. When the gear position com-
manded by the ECM and the actual gear position are not the same, the ECM illuminates the MIL and stores
the DTC.
MONITOR STRATEGY
Related DTCsP0776Shift solenoid valve SL2/ON malfunction
Rid /C tMainShift solenoid valve SL2Required sensors/ComponentsSubSpeed sensor (NT), Speed sensor (NO), Crankshaft position sensor (NE)
Frequency of operationContinuous
ON malfunctions (A), (B) and
(C)0.4 sec.
DurationON malfunction (D)3 sec.
ON malfunction (E)0.5 sec.
MIL operation2 driving cycles
Sequence of operationNone
DIDJF±01

DI±626
± DIAGNOSTICSAUTOMATIC TRANSMISSION
820 Author: Date:
2005 SEQUOIA (RM1146U)
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
All:
Turbine speed sensor circuitNot circuit malfunction
Output speed 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
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
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
ON malfunction (A)
ECM selected gear1st
Vehicle speed2 to 40 km/h (1.2 to 24.9 mph)
Throttle valve opening angle7.0% or more at 2,000 rpm
(Conditions vary with engine speed)±
ON malfunction (B)
ECM selected gear3rd
Vehicle speed2 km/h (1.2 mph) or more±
Throttle valve opening angle7.0% or more at 2,000 rpm
(Conditions vary with engine speed)±
ON malfunction (C)
ECM selected gear4th
Vehicle speed2 km/h (1.2 mph) or more±
Throttle valve opening angle7.0% or more at 2,000 rpm
(Conditions vary with engine speed)±
ON malfunction (D)
Current ECM selected gear5th
Last ECM selected gear4th

ECM command gearshift
Shift solenoid valve SL21st 2nd 3rd 4th 5th
OFF ON ON ON ON DI±628
± DIAGNOSTICSAUTOMATIC TRANSMISSION
822 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 the tester, perform the ºACTIVE TESTº.
HINT:
While driving, the shift position can be forcibly changed with the hand±held tester.
Comparing the shift position commanded by the ACTIVE TEST with the actual shift position enables you
to confirm the problem (See page DI±567).
ItemTest DetailsDiagnostic Note
SHIFT
[Test Details]
Operate the shift solenoid valve and set each shift position by yourself.
[Vehicle Condition]
Less than 50 km/h (31 mph)
[Others]
Press º"º button: Shift up
Press ºuº button: Shift down
Possible to check the operation of
the shift solenoid valves.
HINT:
This test can be conducted when the vehicle speed is 50 km/h (31 mph) or less.
The 4th to 5th up±shiftings must be performed with the accelerator pedal released.
The 5th to 4th down±shiftings must be performed with the accelerator pedal released.
Do not operate the accelerator pedal for at least 2 seconds after shifting and do not shift successively.
The shift position commanded by the ECM is shown in the DATA LIST (SHIFT) display on the hand±
held tester.
The shift solenoid valve SL2 is turned on/off normally when the shift lever is in the D position:

D12795
12
(±)(+)
12
Shift Solenoid Valve SL2:
DI±630
± DIAGNOSTICSAUTOMATIC TRANSMISSION
824 Author: Date:
2005 SEQUOIA (RM1146U)
2 Inspect shift solenoid valve SL2.
PREPARATION:
Remove the shift solenoid valve SL2 (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 SL2
(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).

± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±631
825 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P0778 Pressure Control Solenoid ºBº Electrical
(Shift Solenoid Valve SL2)
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
P0778
The ECM checks for an open or short in the shift solenoid
valve SL2 circuit while driving and shifting gears. (1±trip detec-
tion logic)

Output signal duty equals to 100%.
(NOTE: SL2 output signal duty is less than 100% under nor-
mal condition.)

Open or short in shift solenoid valve SL2 circuit

Shift solenoid valve SL2

ECM
MONITOR DESCRIPTION
This DTC indicates an open or short in the shift solenoid valve SL2 circuit. The ECM commands gear shift
by turning the shift solenoid valves ºON/OFFº. 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. And the ECM per-
forms the fail±safe function and turns the other normal shift solenoid valves ºON/OFFº. (In case of an open
or short circuit, the ECM stops sending current to the circuit.)
While driving and shifting gears, if the ECM detects an open or short in the shift solenoid valve SL2 circuit,
the ECM determines there is a malfunction (See page DI±567).
MONITOR STRATEGY
Related DTCsP0778Shift solenoid valve SL2/Range check
Required sensors/ComponentsShift solenoid valve SL2
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
Battery voltage10 V or more±
CPU commanded duty±Less than 75%
Ignition switchON
StarterOFF
TYPICAL MALFUNCTION THRESHOLDS
Detection criteriaThreshold
Output signal duty100%
DIDJG±01

D14168
Electronically Controlled
Transmission Solenoid
E7ECM
LG±BGR17
16SL2+
SL2± 11
3 V Y E1
SL2+
SL2±+B
CPU
E7 DI±632
± DIAGNOSTICSAUTOMATIC TRANSMISSION
826 Author: Date:
2005 SEQUOIA (RM1146U)
COMPONENT OPERATING RANGE
ParameterStandard value
Output signal dutyLess than 100%
WIRING DIAGRAM

ECM command gearshift
Shift solenoid valve SL21st 2nd 3rd 4th 5th
ON
OFF ON ON ON
1
152 3 4 5 6 7 8
9 10 11 12
13 14
D11994SL2+
SL2±
Transmission Wire Side:
(Connector Front View):
E1
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±633
827 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
HINT:

The shift solenoid valve SL2 is turned on/off normally when the shift lever is in the D position:
1 Inspect 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)
11 (SL2+) ± 3 (SL2±)5.0 to 5.6 W
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionSpecified Condition
11 (SL2+) ± Body ground10 kW or higher
3 (SL2±) ± Body ground=
NG Go to step 3.
OK