Toyota Sequoia (2005). Manual — part 640
I28839
A17 Air Mix Damper
Control Servomotor (Front)
1
2
10
9
AMH
AMC
Integration Control and Panel
R–L
W–L
I20
MHOT
I20
MCOOL
–
DIAGNOSTICS
AIR CONDITIONING SYSTEM
DI–2355
2549
DTC
41
Front Air Mix Damper Control Servomotor
Circuit
CIRCUIT DESCRIPTION
The front air mix damper control servomotor is controlled by the integration control and panel and moves
the air mix damper to the desired position.
DTC No.
Detection Item
Trouble Area
41
Air mix damper position sensor value does not change even if
integration control and panel operates air mix damper control
servomotor.
Front air mix damper control servomotor
Front air mix damper position sensor
Harness or connector between front air mix position sensor
and integration control and panel
Harness or connector between air mix damper control servo-
motor and integration control and panel
Integration control and panel
WIRING DIAGRAM
DI3FI–15
DI–2356
–
DIAGNOSTICS
AIR CONDITIONING SYSTEM
2550
INSPECTION PROCEDURE
1
Actuator check.
PREPARATION:
(a)
Warm up the engine.
(b)
Set to the actuator check mode (See page
).
(c)
Press the DEF switch and change it to step operation.
CHECK:
Press the DEF switch and check the operation of the air mix damper and the condition of the blower.
OK:
Display Code
Air Mix Damper
Condition
0 – 3
–14% (Fully closed)
Cool air comes out
4, 5
50%
–
6 – 9
113.5% (Fully opened)
Warm air comes out
HINT:
However, if DTC 41 is displayed, replace the integration control and panel.
OK
Proceed to next circuit inspection shown in
problem symptoms table (See page
NG
I15902
Cool
Warm
–
DIAGNOSTICS
AIR CONDITIONING SYSTEM
DI–2357
2551
2
Check front air mix damper control servomotor.
PREPARATION:
Remove the front air mix servomotor (See page
).
CHECK:
Connect the positive (+) lead to terminal 1 and the negative (–)
lead to terminal 2.
OK:
The lever turns smoothly to the warm side.
CHECK:
Connect the positive (+) lead to terminal 2 and the negative (–)
lead to terminal 1.
OK:
The lever turns smoothly to the cool side.
NG
Replace front air mix servomotor.
OK
3
Check harness and connector between front air mix servomotor and integration
control and panel (See page
NG
Repair or replace harness or connector.
OK
Replace integration control and panel.
I28840
A16 Air Inlet Damper
Control Servomotor
5
20
8
AIR
AIF
Integration Control and Panel
G–W
I20
R
4
REC
FRS
I20
DI–2358
–
DIAGNOSTICS
AIR CONDITIONING SYSTEM
2552
DTC
42
Air Inlet Damper Control Servomotor Circuit
CIRCUIT DESCRIPTION
The air inlet damper control servomotor is controlled by the integration control and panel and moves the air
inlet damper to the desired position.
DTC No.
Detection item
Trouble Area
Air inlet damper control servomotor
Air inlet damper position sensor
42
Air inlet damper position sensor value does not change even if
integration control and panel operated air inlet damper control
servomotor
Harness or connector between air inlet damper control servo-
motor and integration control and panel
Harness or connector between air inlet damper position sen-
servomotor.
Harness or connector between air inlet damper position sen-
sor and integration control and panel
Integration control and panel
WIRING DIAGRAM
DI3FJ–14
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