Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 1998-2003 Approved FSM 05 acsy ciairout
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DI-744
DIAGNOSTICS - AIR CONDITIONING SYSTEM
DI3W9-08
Air Outlet Control Servomotor Circuit
CIRCUIT DESCRIPTION
This circuit turns the servomotor and changes each mode damper position by signals from the A/C control
assembly. When the AUTO switch is ON, the A/C control assembly changes the mode automatically be-
tween FACE, BI-LEVEL and FOOT according to the temperature setting.
WIRING DIAGRAM
A33
Driver Side J/B No. 1 J/B No. 3 Air Vent Mode Control
Servomotor A/C cotrol assembly
1 HEATER 3 9 21 14
R-Y R-L R-B
1K 1K 1R 3C 3D A23 FACE
R-L 7 1
10
Engine Room J/B No. 2 G-B
A24 B/L
2 AM1 1 2 2 2
2 1 W 11
1K 1B 2L 2D V-W
A24 FOOT
3
F8 FL Block 12
W BR-B
A24 FDEF
I12 ALT INP 4
Ignition Switch 13
L-B
W-L A24 DEF
5
4 IG1 AM1 2 BR
FL MAIN 8
ED
Battery
I21122
2001 SIENNA (RM787U)
Author : Date : 898
DI-745
DIAGNOSTICS - AIR CONDITIONING SYSTEM
INSPECTION PROCEDURE
1 Actuator check.
Display Code Air Flow Mode PREPARATION:
0-4
(a) Set to the actuator check mode (See page DI-689 ).
FACE
(b) Press the DEF switch and change to step operation.
5 BI-LEVEL
CHECK:
6-7 FOOT
Press the DEF switch in order and check the condition of air flow
8 FOOT/DEF mode.
9 DEF OK:
The mode changes with the change in the tempera-
ture display as shown in the table.
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI-697 ).
NG
2 Check air outlet control servomotor.
PREPARATION:
8 7 5 3 1
Remove air outlet control servomotor (See page AC-93 ).
FACE CHECK:
(a) Connect positive (+) lead to terminal 7 and negative (-)
lead to terminal 8.
(b) Check the lever operation when the negative (-) lead is
4 2
DEF B/L connected to the terminals shown below.
OK:
FOOT/DEF FOOT
I21008 The lever moves smoothly to the position for each
mode.
Ground Terminals Mode
5 DEF.
4 FOOT/DEF
3 FOOT
2 B/L
1 FACE
NG Replace air outlet control servomotor.
OK
2001 SIENNA (RM787U)
Author : Date : 899
DI-746
DIAGNOSTICS - AIR CONDITIONING SYSTEM
3 Check harness and connector between A/C control assembly and air outlet con-
trol servomotor, air outlet control servomotor and battery, air outlet control ser-
vomotor and body ground (See page IN-31 ).
NG Repair or replace harness or connector.
OK
Repair or replace A/C control assembly.
2001 SIENNA (RM787U)
Author : Date : 900
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