Toyota Sequoia (2005). Manual - part 217

D14174

ECM

SLT+

SLT–

E7

13

12

B–R

G–Y

E1 Electronically Controlled 
Transmission Solenoid

E7

G

GR

14

6

SLT+

SLT–

+B

1

15

2

3

4

5

6

7

8

9

10

11

12

13

14

D11994

Transmission Wire Side:
(Connector Front View):

E1

SLT–

SLT+

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

DI–663

857

WIRING DIAGRAM

INSPECTION PROCEDURE

1

Check 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)

14 (SLT+) – 6 (SLT–)

5.0 to 5.6 

Ω

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

Tester Connection

Specified Condition

14 (SLT+) – Body ground

10 k

Ω

 or higher

6 (SLT–) – Body ground

↑

NG

Go to step 3.

OK

D14166

ECM:

SLT+

SLT–

E8

E7

E6

E5

E4

DI–664

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

858

2

Check harness and connector (Transmission wire – ECM)

PREPARATION:
(a)

Connect the transmission wire connector.

(b)

Disconnect the ECM connector.

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

Tester Connection

Specified Condition

20



C (68



F)

E7 – 13 (SLT+) – E7 – 12 (SLT–)

5.0 to 5.6 

Ω

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

Tester Connection

Specified Condition

E7 – 13 (SLT+) – Body ground

10 k

Ω

 or higher

E7 – 12 (SLT–) – Body ground

↑

NG

Repair or replace the harness or connector
(See page 

IN–35

).

OK

Replace the ECM (See page 

SF–80

).

D11987

2

1

(+)

(–)

Shift Solenoid Valve SLT:

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

DI–665

859

3

Inspect shift solenoid valve SLT.

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

Repair or replace the transmission wire
(See page 

AT–7

).

DI–666

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

860

DTC

P2740

Transmission Fluid Temperature Sensor ”B”
Circuit

DTC

P2742

Transmission Fluid Temperature Sensor ”B”
Circuit Low Input

DTC

P2743

Transmission Fluid Temperature Sensor ”B”
Circuit High Input

CIRCUIT DESCRIPTION

ATF (Automatic Transmission Fluid) temperature sensor No.2 is on the transmission and just in front of the
oil cooler inlet pipeline. 
If ECM detects the abnormally high temperature of ATF by this sensor, it draws driver’s attention by illuminat-
ing the warning lamp.
HINT:

The temperature of ATF easily rises when towing, climbing hills and in traffic, etc.

If the ATF temperature sensor No.2 becomes short–circuited, the signal that indicates the ATF temper-
ature is 150



C (302



F) or higher is input in ECM.

Vehicle conditions when the sensor is normal and when the sensor is short–circuited are indicated
in the table below.

ATF temperature Sensor No.2

State

Detection Condition

Symptom

Recovery Condition

AT fluid temp. more than 150



C

(302



F).

AT Oil Temp. warning light re-
mains on

AT fluid temp. less than 135



C

(275



F). *

2

AT fluid temp. more than 130



C

(266



F).

Shift point too high.

AT fluid temp. less than 110



C

(230



F).

Sensor is normal

When the conditions (a) and (b)
are satisfied.

(a) AT fluid temp. more than 130



C

(266



F).

(b) Engine coolant temp. more

than 95



C (203



F).

Lock–up at 3rd gear. *

1

AT fluid temp. less than 110



C

(230



F) *

2

 and engine coolant

temp. less than 95



C (203



F).

Sensor is short–circuited

Any conditions.

AT Oil Temp. warning light re-
mains on

Shift point too high.

Symptoms still occur

Sensor is short circuited

Engine coolant temp. more than
95



C (203



F).

Lock–up at 3rd gear. *

1

Symptoms still occur

HINT:
*1: When AT fluid temperature is normal, transmission locks up at 5th gear with the shift lever in D position
and at 4th gear with the shift lever in 4 position.
*2: When AT fluid temperature is in normal range, it decreases to less than 135



C (275



F) within 5 minutes

with the shift lever in P or N position in an idling state.

DIDJN–01