Toyota Sequoia (2005). Manual - part 198

D14161

E8

E7

E6

E5

E4

ECM:

THO1

E2

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

DI–587

781

2

Check harness and connector (Transmission wire – ECM).

PREPARATION:
(a)

Connect the transmission wire connector.

(b)

Disconnect the connector of the ECM.

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

Tester Connection

Specified Condition

E7 – 24 (THO1) – E8 – 28 (E2)

79 

Ω

 to 156 k

Ω

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

Tester Connection

Specified Condition

E7 – 24 (THO1) – Body ground

10 k

Ω

 or higher

E8 – 28 (E2) – Body ground

↑

NG

Repair or replace the harness or connector
(See page 

IN–35

).

OK

Replace the ECM (See page 

SF–80

).

DI–588

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

782

DTC

P0711

Transmission Fluid Temperature Sensor ”A”
Performance

CIRCUIT DESCRIPTION

See page 

DI–582

.

DTC No.

DTC Detection Condition

Trouble Area

P0711

Both (a) and (b) are detected: (2–trip detection logic)
 (a) Intake air and engine coolant temps. are more than –20

°

C

      (–4



F) at engine start

 (b) After normal driving for over 22 min. and 9 km (6 mile) or
      more, ATF temp. is less than 10

°

C (50



F)

Transmission wire (ATF temperature sensor No.1)

MONITOR DESCRIPTION

This DTC indicates that there is a problem with output from the automatic transmission fluid (ATF) tempera-
ture sensor and that the sensor itself is defective. The ATF temperature sensor converts the ATF tempera-
ture to an electrical resistance value. Based on the resistance, the ECM determines the ATF temperature
and detects an open or short in the ATF temperature circuit or a fault in the ATF temperature sensor.
After running the vehicle for a certain period, the ATF temperature should increase. If the ATF temperature
is below 20



C (68



F) after running the vehicle for a certain period, the ECM interprets this as a fault, and

turns on the MIL.

MONITOR STRATEGY

Related DTCs

P0711

ATF temperature sensor/Rationality check

Required sensors/Components

ATF temperature sensor (TFT sensor)

Frequency of operation

Continuous

Duration

3 sec.

MIL operation

2 driving cycles

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

TFT (transmission fluid temperature) sen-

sor circuit

Not circuit malfunction

ECT (Engine coolant temperature) sensor

circuit

Not circuit malfunction

IAT (Intake air temperature) sensor circuit

Not circuit malfunction

Time after engine start

21 min.

 

and 40 sec.

Driving distance after engine start

9 km (5.6 mile) or more

–

IAT (12 sec. after engine start)

–10

°

C (14

°

F) or more

–

ECT (12 sec. after engine start)

–10

°

C (14

°

F) or more

–

DIDJ7–01

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

DI–589

783

TYPICAL MALFUNCTION THRESHOLDS

Detection criteria

Threshold

TFT (transmission fluid temperature)

Less than 20

°

C (68

°

F) 

(varies with TFT (transmission fluid temperature) at engine start)

WIRING DIAGRAM

See page 

DI–582

.

INSPECTION PROCEDURE

HINT:
According to the DATA LIST displayed by the OBD II scan tool or hand–held tester, you can read the value
of the switch, sensor, actuator and so on without parts removal. Reading the DATA LIST as the first step of
troubleshooting  is one method to shorten labor time.
(a)

Warm up the engine.

(b)

Turn the ignition switch off.

(c)

Connect the OBD II scan tool or hand–held tester to the DLC3.

(d)

Turn the ignition switch to the ON position.

(e)

Push the ”ON” button of the OBD II scan tool or the hand–held tester.

(f)

When you use the hand–held tester:
Select the item ”DIAGNOSIS / ENHANCED OBD II / DATA LIST”.

(g)

According to the display on the tester, read the ”DATA LIST”.

Item

Measurement Item/

Range (display)

Normal Condition

AT FLUID TEMP 1

ATF Temp. Sensor Value/

min.: –40



C (–40



F)

max.: 215



C (419



F)

After Stall Test;
Approx. 80



C (176



F)

Equal to ambient temperature when cold soak

HINT:
When DTC P0712 is output and hand–held tester output is 150



C (302



F) or more, there is a short circuit.

When DTC P0713 is output and hand–held tester output is –40



C (–40



F), there is an open circuit.

Measure the resistance between terminal THO1 (OT) and body ground.

Temperature Displayed

Malfunction

–40

°

C (–40

°

F)

Open circuit

150

°

C (302

°

F) or more

Short circuit

HINT:
If a circuit related to the ATF temperature sensor becomes open, P0713 is immediately set (in 0.5 second).
When P0713 is set, P0711 cannot be detected.
It is not necessary to inspect the circuit when P0711 is set.

DI–590

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

784

1

Check other DTCs output (in addition to DTC P0711).

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 ”P0711” is output

A

”P0711” and other DTCs

B

HINT:
If any other codes besides ”P0711” are output, perform troubleshooting for those DTCs first.

B

Go to DTC chart (See page 

DI–573

).

A

2

Check transmission fluid level (See page 

DI–524

).

OK:

Automatic transmission fluid level is correct.

NG

Add fluid

 (See page 

DI–524

)

.

OK

Replace the transmission wire (ATF tempera-
ture sensor) (See page 

AT–7

).