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
Ok
Proceed to next circuit inspection shown in problem symptoms table (See page
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
).
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
, 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
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
OK
Proceed to next circuit inspection shown in problem symptoms table (See page
ever, if DTC 32 or 42 is displayed, replace integration control and panel.
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