Toyota Sequoia (2005). Manual - part 632

I28847

SG–TAM

TAM

I19

Integration Control and Panel:

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

DI–2323

2517

INSPECTION PROCEDURE

1

Check voltage between terminals TAM and SG–TAM of integration control and
panel.

PREPARATION:
Remove the integration control and panel with connectors still
connected.
CHECK:
(a)

Turn the ignition switch to ON.

(b)

Measure the voltage between terminals TAM and SG–
TAM of the integration control and panel connector at
each temperature.

OK:

Voltage :
at 25

°

C (77

°

F) : 1.35 to 1.75 V

at 40

°

C (104

°

F) : 0.85 to 1.25 V

HINT:
As the temperature increases, the voltage decreases.

NG

Go to step 2.

OK

Proceed to next circuit inspection shown in problem symptoms table (See page 

DI–2304

). How-

ever, if DTC 12 is displayed, replace integration control and panel.

I08311

2

1

I28970

Resistance (k

Ω

)

Temperature

4.0

2.0

3.5

1.5

0.0

10

3.0

1.0

2.5

0.5

20

30

40

50

60

68

86

104

122

140

(



C)

(



F)

50

DI–2324

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

2518

2

Check ambient temperature sensor.

PREPARATION:
Disconnect the ambient temperature sensor connector.
CHECK:
Measure the resistance between terminals 1 and 2 of the ambi-
ent temperature sensor connector at each temperature.
OK:

Tester connection

Condition

Specified condition

1–2

10



C (50



F)

3.00 to 3.73 k

Ω

1–2

15



C (59



F)

2.45 to 2.88 k

Ω

1–2

20



C (68



F)

1.95 to 2.30 k

Ω

1–2

25



C (77



F)

1.60 to 1.80 k

Ω

1–2

30



C (86



F)

1.28 to 1.47 k

Ω

1–2

35



C (95



F)

1.00 to 1.22 k

Ω

1–2

40



C (104



F)

0.80 to 1.00 k

Ω

1–2

45



C (113



F)

0.65 to 0.85 k

Ω

1–2

50



C (122



F)

0.50 to 0.70 k

Ω

1–2

55



C (131



F)

0.44 to 0.60 k

Ω

1–2

60



C (140



F)

0.36 to 0.50 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 ambient temperature sensor.

OK

3

Check harness and connector between ambient temperature sensor and integra-
tion control and panel (See page 

IN–35

).

NG

Repair or replace harness or connector.

OK

Replace integration control and panel.

I28833

A13
A/C Evaporator
Temp. Sensor
(Front)

1

2

2

Integration Control and Panel

TE

SG–TE

W–G

G–B

4

I20

I20

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

DI–2325

2519

DTC

13

Front Evaporator Temperature Sensor Cir-
cuit

CIRCUIT DESCRIPTION

This sensor detects the temperature inside the cooling unit and sends the appropriate signals to the integra-
tion control and panel.

DTC No.

Detection Item

Trouble Area

13

Open or short in front evaporator temperature sensor circuit.

Front evaporator temp. sensor

Harness or connector between front evaporator temp. sensor

and integration control and panel

Integration control and panel

WIRING DIAGRAM

DIDKV–01

I28847

SG–TE

TE

I20

Integration Control and Panel:

DI–2326

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

2520

INSPECTION PROCEDURE

1

Check voltage between terminals TE and SG–TE of integration control and pan-
el.

PREPARATION:
Remove the integration control and panel with connectors still
connected.
CHECK:
(a)

Turn the ignition switch to ON.

(b)

Measure the voltage between terminals TE and SG–TE
of the integration control and panel connector at each
temperature.

OK:

Voltage :
at 0

°

C (32

°

F) : 2.0 to 2.4 V

at 15

°

C (59

°

F) : 1.4 to 1.8 V

HINT:
As the temperature increases, the voltage decreases.

NG

Go to step 2.

OK

Proceed to next circuit inspection shown in problem symptoms table (See page 

DI–2304

). How-

ever, if DTC 13 is displayed, replace integration control and panel.