Toyota Sequoia (2005). Manual - part 215

D11993

(+)

(–)

Shift Solenoid Valve SR:

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

DI–655

849

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 Connection

Specified Condition

20



C (68



F)

Solenoid Connector (SR) – Solenoid

Body (SR)

11 to 15 

Ω

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

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

850

DTC

P2714

Pressure Control Solenoid ”D” 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 Condition

Trouble 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

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

DI–657

851

MONITOR STRATEGY

Related DTCs

P2714

Shift solenoid valve SLT/ON malfunction

Main

Shift solenoid valve SLT

Required sensors/Components

Sub

Valve body, ATF temperature sensor, Speed sensor (NT), Speed sensor

(NO)

Frequency of operation

Continuous

Duration

Immediate

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

Transmission Fluid Temperature 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

Shift solenoid valve SLT circuit

Not circuit malfunction

ECT (Engine coolant temperature) sensor

circuit

Not circuit malfunction

KCS sensor circuit

Not circuit malfunction

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

TFT (transmission fluid temperature)

10

°

C or more

–

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

D14174

ECM

SLT+

SLT–

E7

13

12

B–R

G–Y

E1 Electronically Controlled 
Transmission Solenoid

E7

G

GR

14

6

SLT+

SLT–

+B

DI–658

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

852

TYPICAL MALFUNCTION THRESHOLDS

Detection criteria

Threshold

Summation of C1 clutch heat generations 

 = 

∑

 (Turbine speed – Output speed x Temporary ratio)

Specified value

WIRING DIAGRAM