2005 TOYOTA AVENSIS Air mix damper

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

4(V)
1
0
100%
TPI terminal voltage
Damper opening angle
I35378
A23
Air Mix Control Servo Motor (Driver Side) A/C Control Assembly
M
MAX
HOT4P±L
A15 AMDH12
MAX
COOL5B
A15 AMDC11
PT 3GR
A16 TPD8
VZ 2Y±B
A16 S5±22
GND 1Y±R
A15 SG±214
± DIAGNOSTICSAIR CONDITIONING SYSTEM
05±1129
AVENSIS REPAIR MANUAL (RM1018E)
DTC 36 AIR MIX DAMPER POSITION SENSOR
CIRCUIT (DRIVER SIDE)
CIRCUIT DESCRIPTION
This sensor detects the position of the air mix damper and
sends the appropriate signals to the A/C amplifier. The position
sensor is built in the air mix damper servo sub±assy.
DTC No.Detection ItemTrouble Area
36Short to ground or power source circuit in air mix damper posi-
tion sensor circuit.

Air mix damper servo sub±assy (Air mix damper position
sensor)

Harness or connector between air mix damper servo sub±
assy (air mix damper position sensor) and A/C amplifier assy

A/C amplifier assy
WIRING DIAGRAM
05A80±02

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

4
1
0
100%Damper opening angle TPP terminal voltage (V)
I35377
A24
Air Mix Control Servo Motor (Front Passenger Side) A/C Control Assembly
MA15 AMPH W
(*1)
W
(*2) W
(*2)5
IQ1 MAX 4 (*1)
HOT 5 (*2)
A15 AMPC Y
(*1)
Y
(*2) Y
(*2)4
IQ1 MAX 5 (*1)
COOL 4 (*2)2
1
A16 TPP V
(*1)
V
(*2) V
(*2)3
IQ1 PT20
3
A16 S5±1 R
(*1)
R
(*2) R
(*2)1
IQ1 VZ 2 (*1)
1 (*2)1
A15 SG±1 P
(*1)
P
(*2) P
(*2)2
IQ1 GND
1 (*1)
2 (*2)13
*1: LHD
*2: RHD 05±1122
± DIAGNOSTICSAIR CONDITIONING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
DTC 31 AIR MIX DAMPER POSITION SENSOR
CIRCUIT(PASSENGER SIDE)
CIRCUIT DESCRIPTION
This sensor detects the position of the air mix damper and
sends the appropriate signals to the A/C amplifier. The position
sensor is built in the air mix damper servo sub±assy.
DTC No.Detection ItemTrouble Area
31Short to ground or power source circuit in air mix damper posi-
tion sensor circuit.

Air mix damper servo sub±assy (air mix damper position
sensor)

Harness or connector between air mix damper servo sub±
assy (air mix damper position sensor) and A/C amplifier assy

A/C amplifier assy
WIRING DIAGRAM
05A7T±02

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

050TM±13
05±1100
±
DIAGNOSTICS AIR CONDITIONING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
PROBLEM SYMPTOMS TABLE
If the normal code is displayed during DTC check although the problem still occurs, check the circuits for
each problem symptom in the order given in the table below, and proceed to the relevant troubleshooting.
SymptomSuspect AreaSee page
Whole functions of the A/C system does not operate.
1. IG power source circuit
2. A/C amplifier assy
3. Engine ECU 1AZ±FSE: 1AZ±FE:
1ZZ±FE/3ZZ±FE:
1CD±FTV:05±1144
05±1098 05±294
05±149 05±5
05±528
Air Flow Control : No blower operation
1. Blower motor circuit
2. Heater relay circuit
3. Blower w/fan motor sub±assy
4. A/C amplifier assy05±1148
05±1146
05±1148
05±1098
Air Flow Control : No blower control1. Blower motor circuit05±1148
Air Flow Control : Insufficient air out
1. Blower w/fan motor sub±assy
2. Blower motor circuit
3. A/C amplifier assy05±1148
05±1148
05±1098
Temperature Control : Cool air does not come out
1. Volume of refrigerant
2. Drive belt tension
3. Refrigerant pressure
4. Air conditioner magnetic valve circut
5. Pressure sensor circuit
6. Air mix control servomotor circuit
7. Air mix damper position sensor circuit
8. Room temp. sensor circuit
9. Ambient temp. sensor circuit
10.A/C amplifier assy55±24
55±46
55±24
05±1151 05±1116
05±1133
05±1122
05±1102
05±1106
05±1098
Temperature Control : Warm air does not come out
1. Air mix control servomotor circuit
2. Air mix damper position sensor circuit
3. Ambient temp. sensor circuit
4. Room temp. sensor circuit
5. A/C amplifier assy
6. Heater radiator05±1133
05±1122
05±1106
05±1102
05±1098
±
Temperature Control : Output air is warmer or cooler than the set
temperature or response is slow.
1. Room temp. sensor circuit
2. Ambient temp. sensor circuit
3. Solar sensor circuit
4. Air mix damper position sensor circuit
5. Air mix control servomotor circuit
6. Evaporator temp. sensor circuit
7. A/C amplifier assy05±1102
05±110605±1113
05±1122
05±1133
05±1109
05±1098
Temperature Control : No temperature control (only Max. cool or Max. warm)
1. Room temp. sensor circuit
2. Ambient temp. sensor circuit
3. Solar sensor circuit
4. Air mix damper position sensor circuit
5. Air mix control servomotor circuit
6. Evaporator temp. sensor circuit
7. A/C amplifier assy05±1102
05±1106
05±1113
05±1122
05±1133
05±1109
05±1098
No air inlet control1. Recirculation damper servomotor circuit
2. A/C amplifier assy05±1153
05±1098
No air outlet control
1. Air outlet damper position sensor circuit
2. Air outlet control servomotor circuit
3. A/C amplifier assy05±1126
05±1136
05±1098

I35353
Recirculation Damper Servo Sub±assy
Mode Damper Servo Sub±assy
Evaporator Temp. Sensor
Evaporator
Airmix Damper Servo Sub±assy
Airmix No.2 Damper
Servo Sub±assy
Blower Motor ControlBlower w/ Fan Motor
Sub±assy
± DIAGNOSTICSAIR CONDITIONING SYSTEM
05±1097
AVENSIS REPAIR MANUAL (RM1018E)

I35396
R±W (*2) R±W (*2, *1) G±Y (*1)
W±B (*1)
W±B
(*1) R±W (*3, *1)
R±W (*3)
R±W (*2)CB1
CK 12 Center J/BP5
Power Heater SWA/C Control Assembly
A1611
J/C
J26H
J27F3IG
IN 6
E2
A
A J16
J/C
Driver Side J/B
DC6
From
HTR Fuse
ILHOTGASIN
*1: 1CD±FTV
*2: LHD
*3: RHD
± DIAGNOSTICSAIR CONDITIONING SYSTEM
05±1159
AVENSIS REPAIR MANUAL (RM1018E)
HOT GAS HEATER SWITCH CIRCUIT
CIRCUIT DESCRIPTION
Hot gas heater performs only when its switch turns to ON and fulfill the following 6 conditions.

Hot gas heater switch is ON.

Recirculation damper position is FRS.

Blower motor switch is in the position other than OFF.

Ambient temperature varies according to the following condition;
A/C switch ONBelow ±1.5C (32F)
A/C switch OFFBelow 8C (46F)

Air mix damper position is MAX HOT.

Water temperature is 70C (158F) or less.
WIRING DIAGRAM
05C7S±01