Toyota Sequoia (2005). Manual - part 206

D11992

Shift solenoid S2:

(+)

(–)

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

DI–619

813

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 Connection

Specified Condition

20



C (68



F)

Solenoid Connector (S2) – Solenoid

Body (S2)

11 to 15 

Ω

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

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

814

DTC

P0771

Shift Solenoid ”E” 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 Condition

Trouble Area

P0771

The 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 ”stuck ON malfunction” or ”stuck OFF malfunction” of the shift solenoid valve SR or SL1.
The ECM commands gear shifts by turning the shift solenoid valves ”ON/OFF”. 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 DTCs

P0771

Shift solenoid valve SR/Rationality check

R

i d

/C

t

Main

Shift solenoid valve SR

Required sensors/Components

Sub

Speed sensor (NT), Speed sensor (NO), Crankshaft position sensor (NE)

Frequency of operation

Continuous

OFF malfunction (A)

0.4 sec.

Duration

OFF malfunction (B) and (C)

Immediate

Duration

ON malfunction

0.15 sec.

MIL operation

2 driving cycles

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

It

Specification

Item

Minimum

Maximum

All:

Turbine speed sensor circuit

Not circuit malfunction

Output speed sensor circuit

Not circuit malfunction

Shift solenoid valve S1 circuit

Not circuit malfunction

Shift solenoid valve S2 circuit

Not circuit malfunction

Shift solenoid valve SR circuit

Not circuit malfunction

Shift solenoid valve SL1 circuit

Not circuit malfunction

Shift solenoid valve SL2 circuit

Not circuit malfunction

ECT (Engine coolant temperature) sensor

circuit

Not circuit malfunction

KCS sensor circuit

Not circuit malfunction

DIDJE–01

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

DI–621

815

ETCS (Electric throttle control system)

Not system down

Transmission range

”D”

ECT

40

°

C (104

°

F) or more

–

Spark advance from Max. retard timing by

KCS control

0

°

 

CA or more

–

Engine

Starting

Transfer range

”HIGH”

*1

Transfer range ”HIGH” *1 (This condition is applied only 4WD)

*1 Following conditions met

 Vehicle speed sensor circuit

Not circuit malfunction

 Output shaft speed sensor circuit

Not circuit malfunction

 Transfer output speed

143 rpm or more

–

 NO/NOtf (Transfer input speed/Transfer

output speed)

0.9 to 1.1

OFF malfunction (A)

ECM selected gear

5th

Vehicle speed

2 km/h (1.2 mph) or more

–

Throttle valve opening angle

7.0% or more at 2,000 rpm

(Conditions vary with engine speed)

–

OFF malfunction (B)

Current ECM selected gear

5th

Last ECM selected gear

4th

Continuous time for ECM selecting 4th

gear

2 sec. or more

–

OFF malfunction (C)

Current ECM selected gear

5th

Last ECM selected gear

4th

ON malfunction

Current ECM selected gear

2th

Last ECM selected gear

1st

Throttle valve opening angle

(During transition from 1st to 2nd gear)

6.0% or more at 3,000 rpm

(Conditions vary with engine speed)

–

TYPICAL MALFUNCTION THRESHOLDS

Detection criteria

Threshold

[OFF malfunction]

All of the following conditions are met: OFF malfunctions (A), (B) and (C)

2 detections are necessary per driving cycle

 1st detection; temporary flag ON

 2nd detection; temporary pending fault code ON

OFF malfunction (A)

Turbine speed/Output speed

0.93 to 1.07

OFF malfunction (B)

Turbine speed/Output speed

Not change as follow

0.93 to 1.07

↓

0.65 to 0.79

ECM command gearshift

Shift solenoid valve SR

1st

2nd

3rd

4th

5th

OFF

OFF

OFF

Shift solenoid valve SL1

OFF

OFF

OFF

ON

ON

OFF

OFF

DI–622

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

816

OFF malfunction (C)

Output record from ECM for 4th 

→

 5th upshifting

Recorded

[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 ”DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST”.

(g)

According to the display on the tester, perform the ”ACTIVE TEST”.

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

).

Item

Test Details

Diagnostic 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 ”

→

” button: Shift up

Press ”

←

” 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: