Toyota Sequoia (2005). Manual - part 633

N16207

Thermometer

Ice

More than
10 cm (3.94in.)

1

2

I28971

Temperature

Resistance (k

Ω

)

9.0

10.0

8.0

5.0

7.0

4.0

2.0

3.0

0.0

14

32

50

68

86

–10

0

10

20

30

(



F)

(



C)

6.0

1.0

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

DI–2327

2521

2

Check front evaporator temperature sensor.

PREPARATION:
Remove the front evaporator temperature sensor.
CHECK:
Measure the resistance between terminals 1 and 2 of the evap-
orator temperature sensor connector at each temperature.
OK:

Tester connection

Condition

Specified condition

1–2

–10



C (14



F)

7.40 to 9.20 k

Ω

1–2

–5



C (23



F)

5.65 to 7.00 k

Ω

1–2

0



C (32



F)

4.35 to 5.40 k

Ω

1–2

5



C (41



F)

3.40 to 4.20 k

Ω

1–2

10



C (50



F)

2.68 to 3.30 k

Ω

1–2

15



C (59



F)

2.10 to 2.60 k

Ω

1–2

20



C (68



F)

1.66 to 2.10 k

Ω

1–2

25



C (77



F)

1.32 to 1.66 k

Ω

1–2

30



C (86



F)

1.05 to 1.35 k

Ω

NOTICE:

Even slightly touching the sensor may change the re-
sistance value. Be sure to hold the connector of the
sensor.

When measuring, the sensor temperature must be
the same as the ambient temperature.

HINT:
As the temperature increases, the resistance decreases (see
the graph on the left).

NG

Replace front evaporator temperature sensor.

OK

3

Check harness and connector between front evaporator temperature sensor and
integration control and panel (See page 

IN–35

).

NG

Repair or replace harness or connector.

OK

Replace integration control and panel.

I08286

E2
Engine Coolant 
Temp. Sensor

1

2

Integration Control and Panel

I22

E8

21

28

E8

E2

THW

ECM

THWO

E5

14

W–R

2

G–Y

G–W

TW

DI–2328

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

2522

DTC

14

Engine Coolant Temperature Sensor Circuit

CIRCUIT DESCRIPTION

This sensor detects the engine coolant temperature and sends the appropriate signals to the integration
control and panel. These signals are used for warm up control when the engine is cold.

DTC No.

Detection Item

Trouble Area

14

Open or short in engine coolant temperature sensor circuit.

Engine coolant temp. sensor

Harness or connector between engine coolant temp. sensor

and ECM

Harness or connector between ECM and integration control

and panel

ECM

Integration control and panel

WIRING DIAGRAM

DI935–03

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

DI–2329

2523

INSPECTION PROCEDURE

1

Is DTC P0115, P0117 or P0118 output?

YES

Go to engine troubleshooting 
(See page 

DI–9

).

NO

2

Check harness and connector between ECM and integration control and panel.

NG

Repair or replace harness or connector.

OK

Replace integration control and panel.

I15861

Integration Control and Panel

A29
A/C Evaporator Temp. 
Sensor (Rear)

I21

RrTE

17

LG–R

BH1

8

1

2

1

L–R

L–R

10

RrSG

18

IJ3

6

LG–R

BH1

LG–R

w/ Rear A/C:

L–R

IJ3

I21

DI–2330

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

2524

DTC

17

Rear Evaporator Temperature Sensor Circuit

CIRCUIT DESCRIPTION

This sensor detects the rear evaporator temperature and sends the appropriate signals to the integration
control and panel.

DTC No.

Detection Item

Trouble Area

17

Open or short in rear evaporator temperature sensor circuit.

Rear evaporator temp. sensor

Harness or connector between rear evaporator temp. sensor

and integration control and panel

Integration control and panel

WIRING DIAGRAM

DIDKW–01