Toyota Sequoia (2005). Manual - part 216

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

DI–659

853

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 tester, perform the ”ACTIVE TEST”.

Item

Test Details

Diagnostic 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 ”Control the Line Pres-

sure Up” is performed, the ECM commands the SLT solenoid to turn

off).

ON: No action (normal operation)

–

*: ”LINE PRESS UP” 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.

DI–660

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

854

1

Check other DTCs output (in addition to DTC P2714).

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 ”DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES”.

CHECK:
Read the DTCs using the OBD II scan tool or the hand–held tester.
RESULT:

Display (DTC output)

Proceed to

Only ”P2714” is output

A

”P2714” and other DTCs

B

HINT:
If any other codes besides ”P2714” are output, perform troubleshooting for those DTCs first.

B

Go to DTC chart (See page 

DI–573

).

A

D11987

2

1

(+)

(–)

Shift Solenoid Valve SLT:

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

DI–661

855

2

Inspect shift solenoid valve SLT operation.

PREPARATION:
Remove the shift solenoid valve SLT (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)

1 – 2

5.0 to 5.6 

Ω

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 SLT
(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–662

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

856

DTC

P2716

Pressure Control Solenoid ”D” Electrical
(Shift Solenoid Valve SLT)

CIRCUIT DESCRIPTION

See page 

DI–656

DTC No.

DTC Detection Condition

Trouble Area

P2716

Open or short is detected in shift solenoid valve SLT circuit for
1 second or more while driving (1–trip detection logic).

Open or short in shift solenoid valve SLT circuit

Shift solenoid valve SLT

ECM

MONITOR DESCRIPTION

When an open or short in the linear solenoid valve (SLT) circuit is detected, the ECM interprets this as a fault.
The ECM will turn on the MIL and store the DTC.

MONITOR STRATEGY

Related DTCs

P2716

Shift solenoid valve SLT/Range check

Required sensors/Components

Shift solenoid valve SLT

Frequency of operation

Continuous

Duration

1 sec.

MIL operation

Immediate

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

It

Specification

Item

Minimum

Maximum

The monitor will run whenever this DTC is

not present.

See page 

DI–545

Solenoid current cut status

Not cut

Battery voltage

11 V or more

–

CPU command duty ratio to SLT

19% or more

–

Ignition switch

ON

Starter

OFF

TYPICAL MALFUNCTION THRESHOLDS

Detection criteria

Threshold

Solenoid status from IC

Fail (Open or short)

COMPONENT OPERATING RANGE

Parameter

Standard value

Output signal duty

Less than 100%

DIDJM–01