2001 TOYOTA SEQUOIA solenoid

D11991
Shift solenoid S1:
(+) (±)
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±613
807 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check shift solenoid valve S1 operation.
PREPARATION:
Remove the shift solenoid valve S1 (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 (S1) ± Solenoid
Body (S1)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 shift solenoid valve S1
(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±614
± DIAGNOSTICSAUTOMATIC TRANSMISSION
808 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P0756 Shift Solenoid ºBº Performance
(Shift Solenoid Valve S2)
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
P0756The gear required by the ECM does not match the actual gear
when driving (2±trip detection logic)
Shift solenoid valve S2 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 S2.
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
RltdDTCP0756Shift solenoid valve S2/OFF malfunctionRelated DTCsP0756Shift solenoid valve S2/ON malfunction
MainShift solenoid valve S2
Required sensors/ComponentsSubVehicle speed sensor, Throttle position sensor, Speed sensor (NT), Speed
sensor (NO)
Frequency of operationContinuous
OFF malfunction (A), (B), (C)0.4 sec.
OFF malfunction (D)Immediate
DurationON malfunction (A) and (B)0.4 sec.Duration
ON malfunction (C)3 sec.
ON malfunction (D)0.5 sec.
MIL operation2 driving cycles
Sequence of operationNone
DIDJD±01

± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±615
809 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
OFF 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)±
OFF malfunction (B)
ECM selected gear2nd
Vehicle speed2 km/h (1.2 mph) or more±
Output speed2nd " 1st down shift point or more±
Throttle valve opening angle7.0% or more at 2,000 rpm
(Conditions vary with engine speed)±
OFF malfunction (C)
Current ECM selected gear5th
Last ECM selected gear4th
Continuous time for ECM selecting 4th
gear2 sec. or more±
Actual gear when ECM selected 4th gear4th
OFF malfunction (D)
Current ECM selected gear5th

ECM command gearshift
Shift solenoid valve S21st 2nd 3rd 4th 5th
OFF ON
ON OFF OFF
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±617
811 Author: Date:
2005 SEQUOIA (RM1146U) ON malfunction (E)
Turbine speed ± Output speed x 5th gear ratio
(NT ± NO x 5th gear ratio)1,000 rpm or more
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 S2 is turned on/off normally when the shift lever is in the D position:

D11992
Shift solenoid S2:
(+) (±)
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±619
813 Author: Date:
2005 SEQUOIA (RM1146U)
2 Inspect shift solenoid valve S2 operation.
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 shift solenoid valve S2
(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±620
± DIAGNOSTICSAUTOMATIC TRANSMISSION
814 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P0771 Shift Solenoid ºEº Performance
(Shift Solenoid Valve SR)
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
P0771The gear required by the ECM does not match the actual gear
when driving (2±trip detection logic)

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.)
MONITOR DESCRIPTION
This DTC indicates ºstuck ON malfunctionº or ºstuck OFF malfunctionº of the shift solenoid valve SR or SL1.
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 DTCsP0771Shift solenoid valve SR/Rationality check
Rid /C tMainShift solenoid valve SRRequired sensors/ComponentsSubSpeed sensor (NT), Speed sensor (NO), Crankshaft position sensor (NE)
Frequency of operationContinuous
OFF malfunction (A)0.4 sec.
DurationOFF malfunction (B) and (C)ImmediateDuration
ON malfunction0.15 sec.
MIL operation2 driving cycles
Sequence of operationNone
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
DIDJE±01

ECM command gearshift
Shift solenoid valve SR1st 2nd 3rd 4th 5th
OFF
OFF OFF
Shift solenoid valve SL1OFF
OFF OFFON
ON OFF
OFF DI±622
± DIAGNOSTICSAUTOMATIC TRANSMISSION
816 Author: Date:
2005 SEQUOIA (RM1146U) OFF malfunction (C)
Output record from ECM for 4th " 5th upshiftingRecorded
[ON malfunction]
2 detections are necessary per driving cycle
1st detection; temporary flag ON
2nd detection; temporary pending fault code ON
Turbine speed ± Output speed x 1st gear ratio
(NT ± NO x 1st gear ratio)150 rpm or more
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 SR and SL1 is turned on/off normally when the shift lever is in the D position:

D11993
(+) (±) Shift Solenoid Valve SR:
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±623
817 Author: Date:
2005 SEQUOIA (RM1146U)
1 Check other DTCs output (in addition to DTC P0771).
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 ºP0771º is outputA
ºP0771º and other DTCsB
HINT:
If any other codes besides ºP0771º are output, perform troubleshooting for those DTCs first.
B Go to DTC chart (See page DI±573).
A
2 Inspect shift solenoid valve SR operation.
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 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 shift solenoid valve SR
(See page AT±10).
OK