Toyota Sequoia (2005). Manual - part 221

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

DI–679

873

4

Check torque converter clutch (See page 

AT–30

).

OK:

The torque converter clutch operates normally.

NG

Replace the torque converter clutch
(See page 

AT–25

).

OK

Repair or replace transmission (See page 

AT–25

).

Current flow to solenoid

Lock–up
Operation
Pressure

BE4056

D00160

1 cycle

ON

OFF

DI–680

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

874

DTC

P2759

Torque Converter Clutch Pressure Control Solenoid
Control Circuit Electrical(Shift Solenoid Valve SLU)

CIRCUIT DESCRIPTION

The amount of current flow to the solenoid is controlled by the
(*) duty ratio of the ECM output signal. The higher the duty ratio
becomes, the higher the lock–up hydraulic pressure becomes
during the lock–up operation.
(*) 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

P2759

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

Open or short in shift solenoid valve SLU circuit

Shift solenoid valve SLU

ECM

MONITOR DESCRIPTION

When an open or short in a shift solenoid valve (SLU) circuit is detected, the ECM determines there is a mal-
function. The ECM will turn on the MIL and store this DTC.

MONITOR STRATEGY

Related DTCs

P2759

Shift solenoid valve SLU/Range check

Required sensors/Components

Shift solenoid valve SLU

Frequency of operation

Continuous

Duration

1 sec.

MIL operation

Immediate

Sequence of operation

None

DIDJP–01

D14178

Electronically Controlled 
Transmission Solenoid

E7

ECM

E7

P–L

L–W

15

14

SLU+

SLU–

13

LG

BR

SLU–

SLU+

E1

+B

5

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

DI–681

875

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

CPU commanded duty

19% or more

–

Battery voltage

11 V 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%

WIRING DIAGRAM

1

15

2

3

4

5

6

7

8

9

10

11

12

13

14

D11994

Transmission Wire Side:
(Connector Front View):

E1

SLU–

SLU+

DI–682

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

876

INSPECTION PROCEDURE

1

Inspect transmission wire.

PREPARATION:
Disconnect the transmission wire connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Tester Connection

Specified Condition

20



C (68



F)

13 (SLU+) – 5 (SLU–)

5.0 to 5.6 

Ω

CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Tester Connection

Specified Condition

13 (SLU+) – Body ground

10 k

Ω

 or higher

5 (SLU–) – Body ground

↑

NG

Go to step 3.

OK