Toyota Sequoia (2005). Manual - part 638

I28847

SG–TP

TP

I20

Integration Control and Panel:

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

DI–2347

2541

INSPECTION PROCEDURE

1

Check voltage between terminals TP and SG–TP 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)

Change the set temperature to activate the front air mix
damper control servomotor, and measure the voltage be-
tween terminals TP and SG–TP of the integration control
and panel connector each time the set temperature is
changed.

OK:

Set Temperature

Voltage

Max. cool

3.5 to 4.5 V

Max. hot

0.5 to 1.5 V

HINT:
As the set 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 31 is displayed, replace integration control and panel.

I15902

Cool

Warm

DI–2348

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

2542

2

Check front air mix damper position sensor.

PREPARATION:
Remove the front air mix servomotor (See page 

AC–86

).

CHECK:
Measure the resistance between terminals 3 and 4 of the front
air mix servomotor connector.
OK:

Resistance : 4.2 to 7.8 k

Ω

CHECK:
While operating the front air mix servomotor, following the pro-
cedure on page 

DI–2355

, measure the resistance between ter-

minals 3 and 4 of the front air mix servomotor connector.
OK:

Position

Resistance

Max. cool

3.6 to 6.8 k

Ω

Max. warm

0.5 to 1.1 k

Ω

HINT:
As the front air mix servomotor moves from the cool side to the
warm side, the resistance decreases.

NG

Replace front air mix servomotor.

OK

3

Check harness and connector between front air mix damper position sensor and
integration control and panel (See page 

IN–35

).

NG

Repair or replace harness or connector.

OK

Replace integration control and panel.

(V)

4

1

0

100 %

T

P

I terminal voltage

Damper opening angle

I15866

A16
Air Inlet Control
Servomotor

1

Y–R

2

3

11

16

13

S5–AI

TPI

SG–TPI

Integration Control
and Panel

I20

L–B

W

VZ

PT

GND

I20

I20

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

DI–2349

2543

DTC

32

Air Inlet Damper Position Sensor Circuit

CIRCUIT DESCRIPTION

This sensor detects the position of the air inlet damper and
sends the appropriate signals to the integration control and
panel.
The position sensor is built into the air inlet damper control ser-
vomotor assembly.

DTC No.

Detection Item

Trouble Area

32

Short to ground or short to power source circuit in air inlet

Air inlet damper position sensor

Harness or connector between air inlet damper position sen-

32

Short to ground or short to  ower source circuit in air inlet

damper position sensor circuit.

Harness or connector between air inlet dam er  osition sen-

sor and integration control and panel

Integration control and panel

WIRING DIAGRAM

DI3FG–10

I28847

SG–TPI

TPI

I20

Integration Control and Panel:

DI–2350

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

2544

INSPECTION PROCEDURE

1

Check voltage between terminals TPI and SG–TPI 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)

Press the REC/FRS switch to change air inlet between
fresh and recirculation air, and measure the voltage be-
tween terminals TPI and SG–TPI of the integration con-
trol and panel when the air inlet damper control servomo-
tor operates.

OK:

FRS–REC Switch

Voltage

REC

3.5 to 4.5 V

FRS

0.5 to 1.5 V

HINT:
As the air inlet damper control servomotor is moved from the
REC side to the FRS side, 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 32 or 42 is displayed, replace integration control and panel.