Replace air mix damper TOYOTA AVENSIS 2005 Service Repair Manual

I35383
RHD Models:
MAX. COOL MAX. HOT
1
2
3
4
5
MAX HOTMAX COOL
I36141
LHD Models:
MAX. COOL MAX. HOT
MAX HOTMAX COOL
±
DIAGNOSTICS AIR CONDITIONING SYSTEM
05±1141
AVENSIS REPAIR MANUAL (RM1018E)
2INSPECT AIRMIX DAMPER SERVO SUB±ASSY
(a)Remove the air mix damper servo sub±assy.
(b)Connect the positive (+) lead from the battery to terminal
MAX HOT and negative (±) lead to terminal MAX COOL,
then check that the lever turns to ºHOTº side smoothly.
(c)Connect the positive (+) lead from the battery to terminal MAX COOL and negative (±) lead to terminal MAX HOT,
then check that the lever turns to ºCOOLº side smoothly.
NGREPLACE AIRMIX DAMPER SERVO SUB±ASSY
OK
3CHECK HARNESS AND CONNECTOR(AIRMIX DAMPER SERVO SUB±ASSY ± A/C AMPLIFIER)
(a)Check for an open or short circuit in harness and connector between air mix c\
ontrol servomotor and
A/C amplifier (See page 01±32).
NG REPAIR OR REPLACE HARNESS ORCONNECTOR
OK
REPLACE AIR CONDITIONING AMPLIFIER

I35383
LHD Models:
MAX. COOL MAX. HOT
1
2
3
4
5
MAX HOTMAX COOL
I36141
LHD Models:
MAX. COOL MAX. HOT
MAX HOTMAX COOL
±
DIAGNOSTICS AIR CONDITIONING SYSTEM
05±1135
AVENSIS REPAIR MANUAL (RM1018E)
2INSPECT AIRMIX NO.2 DAMPER SERVO SUB±ASSY
(a)Remove the air mix damper servo sub±assy.
(b)Connect the positive (+) lead from the battery to terminal
MAX HOT and negative (±) lead to terminal MAX COOL,
then check that the lever turns to ºHOTº side smoothly.
(c)Connect the positive (+) lead from the battery to terminal MAX COOL and negative (±) lead to terminal MAX HOT,
then check that the lever turns to ºCOOLº side smoothly.
NGREPLACE AIRMIX NO.2 DAMPER SERVO SUB±ASSY
OK
3CHECK HARNESS AND CONNECTOR(AIRMIX DAMPER NO.2 SERVO SUB±ASSY ± A/C AMPLIFIER)
(a)Check for an open or short circuit in harness and connector between air mix d\
amper control servomotor
and A/C amplifier (See page 01±32).
NG REPAIR OR REPLACE HARNESS ORCONNECTOR
OK
REPLACE AIR CONDITIONING AMPLIFIER

I35383
RHD Models:
MAX. COOL MAX. HOT
12345
P
T V
Z GND
I36141
LHD Models:
MAX. COOL MAX. HOT
P T VZGND
±
DIAGNOSTIC SAIR CONDITIONING SYSTEM
05± 1131
A VENSIS RE PAIR MANUAL (RM1018E)
2 INSPEC T AIRMIX DAMPER SE RVO SUB±ASSY
(a ) Remov e the air mix damper servo sub±ass y.
(b ) Measur e the resistance between terminal VZ and GND of
air mix damper servo sub±assy connecto r.
Resistance: 4.2 to 7.8 k

(c ) Whil e operating air mix damper servo sub±assy as shown
i n the procedure on page 05±1139 , measure resistance
betwee n terminal PT and GND of air mix damper servo
sub±ass y.
Resistance :
MAX. HO T: 3.4 to 6.2 k

MAX. COOL: 0.8 to 1.6 k

HIN T:
A s the air mix damper servo sub±assy moves from COOL side
t o HOT side, the resistance decreases gradually without inter-
ruption.
NG REPLAC E AIRMIX DAMPER SE RVO SUB±ASSY
OK
3 CHEC K HARNESS AND CONNEC TOR(AIRMIX DAMPER SE RVO SUB±ASSY ± A/C
AMPLIFIER)
(a ) Chec k for an open and short circuit in harness and connector between air mix damper p\
osition sensor
an d A/C amplifier ( See page 01±32 ).
NG REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

I35383
LHD Models:
MAX. COOL MAX. HOT
12345
P
T VZ GND
I36141
RHD Models:
MAX. COOL MAX. HOT
P T V
Z GND
05±
1124
±
DIAGNOSTIC SAIR CONDITIONING SYSTEM
A VENSIS RE PAIR MANUAL (RM1018E)
2 INSPEC T AIRMIX NO.2 DAMPER SE RVO SUB±ASSY
(a ) Remov e the air mix damper servo sub±ass y.
(b ) Measur e the resistance between terminal VZ and GND of
air mix damper servo sub±assy connecto r.
Resistance: 4.2 to 7.8 k

(c ) Whil e operating air mix damper servo sub±assy as shown
i n the procedure on page 05±1133 , measure the resis-
tanc e between terminal PT and GND of air mix damper
serv o sub±ass y.
Standard:
MAX. HO T: 3.4 to 6.2 V
MAX. COOL: 0.8 to 1.6 V
HIN T:
A s the air mix damper servo sub±assy moves from COOL side
t o HOT side, the resistance decreases gradually without inter-
ruption.
NG REPLAC E AIRMIX NO.2 DAMPER SE RVO
SUB±ASSY
OK
3 CHEC K HARNESS AND CONNEC TOR(AIRMIX NO.2 DAMPER SE RVO SUB±ASSY
± A/C AMPLIFIER)
(a ) Chec k for an open or short circuit in harness and connector between air mix d\
amper position sensor
an d A/C amplifier ( See page 01±32 ).
NG REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

I30157
I30162
To ºMAX HOTº
To ºMAX COOLº
± HEATER & AIR CONDITIONERAIR CONDITIONING SYSTEM
55±9
AVENSIS REPAIR MANUAL (RM1018E)
4. INSPECT AIRMIX DAMPER SERVO SUB±ASSY
(MANUAL AIR CONDITIONING)
(a) Inspect servomotor operation.
(1) Connect the positive (+) lead from the battery to ter-
minal 4 and negative (±) lead to terminal 5, then
check that the arm turns to ºMAX COOLº side
smoothly.
(2) Connect the positive (+) lead from the battery to ter-
minal 5 and negative (±) lead to terminal 4, then
check that the arm turns to ºMAX HOTº side
smoothly.
If operations are not as specified, replace the servomotor.

550RQ±02
55±6
±
HEATER & AIR CONDITIONER AIR CONDITIONING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
PROBLEM SYMPTOMS TABLE
Use the table below to help you find the cause of the problem. The numbers \
indicate the priority of the likely
cause of the problem. Check each part in order. If necessary, replace these parts.
SymptomSuspect AreaSee page
Whole functions of the A/C system does not operate.
4. ECU±B fuse
5. A/C amplifier assy
6. Wire harness or connector±
55±3 ±
Air Flow Control : No blower operation
1. Blower resistor
2. Heater relay
3. Blower w/ fan motor sub±assy
4. A/C amplifier assy
5. Wire harness or connector55±7
55±7
55±7
55±3±
Air Flow Control : No blower control
1. Blower w/fan motor sub±assy
2. Blower resistor
3. A/C amplifier assy
4. Wire harness or connector55±7
55±7
55±3
±
Air Flow Control : Insufficient air out
1. Blower w/fan motor sub±assy
2. Blower resistor
3. A/C amplifier assy
4. Wire harness or connector55±7
55±7
55±3±
Temperature Control : No cool air comes out
1. Volume of refrigerant
2. Drive belt tension
3. Refrigerant pressure
4. Cooler compressor assy
5. Pressure sensor
6. Condenser fan
7. Air mix damper servo sub±assy
8. A/C amplifier assy
9. Wire harness or connector55±24
55±46
55±2455±7
55±3 ±
55±7
55±3 ±
Temperature Control : No warm air comes out
1. Engine coolant volume
2. Cooler thermistor No.1
3. Air mix damper servo sub±assy
4. A/C amplifier assy
5. Heater radiator unit sub±assy
6. Wire harness or connector55±7
55±3
55±7
55±3±
±
Temperature Control : Output air is warmer or cooler than the set
temperature or response is slow.1. A/C amplifier assy
2. Air mix damper servo sub±assy
3. Air mix level55±3
55±7
±
Temperature Control : No temperature control
1. A/C amplifier assy
2. Air mix damper servo sub±assy
3. Air mix level55±3
55±7±
No air inlet control
1. Recirculation damper servo sub±assy
2. A/C amplifier assy
3. Wire harness or connector55±7
55±3±
No air outlet control
1. A/C amplifier assy
2. Mode damper servo sub±assy
3. Mode lever55±3
55±7±
Engine idle up does not occur, or is continuous
1. Idle up switch
2. Cooler compressor assy
3. A/C amplifier assy
4. Wire harness or connector55±7
55±7
55±3±
Brightness does not changes when rheostat volume or light con-
trol switch it turned.1. Illumination light system
2. A/C amplifier assy
3. Wire harness or connector±
55±3 ±