2001 TOYOTA SEQUOIA relay

ECM command gearshift
Shift solenoid valve S11st 2nd 3rd 4th 5th
OFF ON
ON OFF OFF
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±611
805 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 S1 is turned on/off normally when the shift lever is in the D position:

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:

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:

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:

± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±639
833 Author: Date:
2005 SEQUOIA (RM1146U)
2 Perform active test
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).
Standard:
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.
OK:
Gear position changes in accordance with the tester command.
NG Repair or replace valve body

(See page AT±10).
OK

± 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.

± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±673
867 Author: Date:
2005 SEQUOIA (RM1146U)
MONITOR DESCRIPTION
Torque converter lock±up is controlled by the ECM based on the turbine (input) speed sensor NT, output
speed sensor SP2, engine rpm, engine load, engine temperature, vehicle speed, transmission temperature,
and gear selection. The ECM determines the lock±up status of the torque converter by comparing the engine
rpm (NE) to the input turbine rpm (NT). The ECM calculates the actual transmission gear by comparing input
turbine rpm (NT) to output shaft rpm (SP2). When conditions are appropriate, the ECM requests ºlock±upº
by applying control voltage to the shift solenoid SLU. When the SLU is turned on, it applies pressure to the
lock±up relay valve and locks the torque converter clutch.
If the ECM detects no lock±up after lock±up has been requested or if it detects lock±up when it is not re-
quested, the ECM interprets this as a fault in the shift solenoid valve SLU or lock±up system performance.
The ECM will turn on the MIL and store the DTC.
Example:
When any of the following is met, the system judges it as a malfunction.
(a) There is a difference in rotation between the input side (engine speed) and output side (input turbine
speed) of the torque converter when the ECM commands lock±up.
(Engine speed is at least 70 rpm greater than input turbine speed.)
(b) There is no difference in rotation between the input side (engine speed) and output side (input turbine
speed) of the torque converter when the ECM commands lock±up off.
(The difference between engine speed and input turbine speed is less than 35 rpm.)
MONITOR STRATEGY
RltdDTCP2757Shift solenoid valve SLU/OFF malfunctionRelated DTCsP2757Shift solenoid valve SLU/ON malfunction
MainShift solenoid valve SLU
Required sensors/ComponentsSubValve body, Vehicle speed sensor, Throttle position sensor, Speed sensor
(NT), Speed sensor (NO)
Frequency of operationContinuous
OFF malfunction (A)2 sec.
DurationOFF malfunction (B)0.4 sec.Duration
ON malfunction1.8 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
Torque converter clutch pressure control
solenoid circuitNot circuit malfunction
KCS sensor circuitNot circuit malfunction
ETCS (Electric throttle control system)Not system down
Transmission rangeºDº

G23400G23400D14177
Accelerator Pedal
Opening Angle
Lock±up OFF
Lock±up ON
"time Engine Speed
Accelerator Pedal
Fully Released DI±676
± DIAGNOSTICSAUTOMATIC TRANSMISSION
870 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.
ItemTest DetailsDiagnostic Note
LOCK UP
[Test Details]
Control the shift solenoid SLU to set the automatic transmission to the
lock±up condition.
[Vehicle Condition]

Throttle valve opening angle: Less than 35 %

Vehicle Speed: 60 km/h (37 mph) or more
Possible to check the SLU opera-
tion.
HINT:

This test can be conducted when the vehicle speed is 60 km/h (37 mph) or more.

This test can be conducted in the 5th gear.

Lightly depress the accelerator pedal and check that the engine speed does not change abruptly.
HINT:

When changing the accelerator pedal opening angle while driving, if the engine speed does not
change, lock±up is on.

Slowly release, but not fully, the accelerator pedal in order to decelerate. (Fully releasing the pedal will
close the throttle valve and lock±up may be turned off automatically.)