Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 1998-2003 Approved FSM 05 acsy cidtc31
<< Back | HomeMost service manuals and schematics are PDF files, so You will need Adobre Acrobat Reader to view : Acrobat Download Some of the files are DjVu format. Readers and resources available here : DjVu Resources
For the compressed files, most common are zip and rar. Please, extract files with Your favorite compression software ( WinZip, WinRAR ... ) before viewing. If a document has multiple parts, You should download all, before extracting.
Good luck. Repair on Your own risk. Make sure You know what You are doing.
Image preview - the first page of the document
>> Download cidtc31 documenatation <<
Text preview - extract from the document
DI-727
DIAGNOSTICS - AIR CONDITIONING SYSTEM
DI3FF-05
DTC 31, 41 Front Air Mix Damper Position Sensor Cir-
cuit
CIRCUIT DESCRIPTION
TP terminal voltage This sensor detects the position of the air mix damper and
(V) sends the appropriate signals to the A/C control assembly.
4 The position sensor is built into the air mix damper control ser-
vomotor assembly.
1
0 100 %
(Cool) (Hot)
Damper opening angle
DTC No. Detection Item Trouble Area
Short to ground or power source circuit in front air mix damper
31 S Front air mix damper position sensor.
position sensor circuit.
SHHarness or connector between front air mix damper control
t b t f t i i d t l
Front air mix damper position sensor value does not change
servomotor assembly and A/C control assembly.
41 even if A/C control assembly operates front air mix damper
S A/C control assembly.
control servomotor.
WIRING DIAGRAM
A32
Air Mix Control
Servomotor A/C Control Assembly
6
TP 3 BR-R
A23 TPD
12
SG 1 R-W
A25 SG
1
2 W
A23 S5
S5
I14169
2001 SIENNA (RM787U)
Author : Date : 881
DI-728
DIAGNOSTICS - AIR CONDITIONING SYSTEM
INSPECTION PROCEDURE
1 Check voltage between terminals TPD and SG of A/C control assembly connec-
tor.
PREPARATION:
ON TPD Remove A/C control assembly with connectors still connected.
CHECK:
(a) Turn 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 TPD and SG of A/C control assembly
SG connector each time when the set temperature is
(-) (+) I20987 changed.
OK:
Set Temperature Voltage
Max. cool 3.5 - 4.5 V
Max. hot 0.5 - 1.5 V
HINT:
As the set temperature increases, the voltage decreases.
NG Go to step 2.
Ok
Proceed to next circuit inspection shown on problem symptoms table (See page DI-697 ). Howev-
er, if DTC 31 or 41 is displayed, check and replace A/C control assembly.
2001 SIENNA (RM787U)
Author : Date : 882
DI-729
DIAGNOSTICS - AIR CONDITIONING SYSTEM
2 Check front air mix damper position sensor.
1
PREPARATION:
Remove air mix servomotor (See page AC-90 ).
"COOL" CHECK:
Measure resistance between terminals 1 and 2 of front air mix
damper control servomotor assembly connector.
OK:
2
Resistance : 4.2 - 7.8 k
3 CHECK:
"WARM" I21007 While operating front air mix damper control servomotor, follow-
ing the procedure, measure resistance between terminals 1
and 3 of front air mix damper control servomotor assembly con-
nector.
OK:
Position Resistance
Max. cool 3.6 - 6.8 k
Max. warm 0.5 - 1.1 k
HINT:
As the front air mix damper control servomotor moves from cool
side to warm side, the resistance decreases.
NG Replace front air mix damper control servomo-
tor assembly.
OK
3 Check harness and connector between A/C control assembly and front air mix
damper control servomotor assembly (See page IN-31 ).
NG Repair or replace harness or connector.
OK
Check and replace A/C control assembly.
2001 SIENNA (RM787U)
Author : Date : 883
◦ Jabse Service Manual Search 2026 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo