2005 TOYOTA AVENSIS air conditioning

05±1128
±
DIAGNOSTICS AIR CONDITIONING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
3CHECK HARNESS AND CONNECTOR(MODE DAMPER SERVO SUB±ASSY ± A/C AMPLIFIER)
(a)Check for an open or short circuit in harness and connector between mode damp\
er position sensor
and A/C amplifier (See page 01±32).
NG REPAIR OR REPLACE HARNESS ORCONNECTOR
OK
4 READ OUTPUT DTC
(a) Clear the DTCs.
(b) Read the DTC at least 1.0 minutes after turnig the ignition switch ON. Standard: Normal codes are output.
NG REPLACE AIR CONDITIONING AMPLIFIER
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE

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

I36144
TPPSG±1
A16A15
± DIAGNOSTICSAIR CONDITIONING SYSTEM
05±1123
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1 INSPECT AIR CONDITIONING AMPLIFIER(TPP ± SG±1)
(a) Remove the A/C amplifier with connectors being con-
nected.
(b) Turn the ignition switch to ON.
(c) Change the set temperature to activate the air mix damp-
er and measure the voltage between terminal TPP and
SG±1 of A/C amplifier assy.
Standard:
MAX. COOL: 3.5 to 4.5 V
MAX. HOT: 0.5 to 1.8 V
HINT:
As the set temperature increases, the voltage decreases grad-
ually without interruption.
OK PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN ON PROBLEM SYMPTOMS TABLE
NG

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

± DIAGNOSTICSAIR CONDITIONING SYSTEM
05±1125
AVENSIS REPAIR MANUAL (RM1018E)
4 READ OUTPUT DTC
(a) Clear the DTCs.
(b) Read the DTC at least 1.0 minutes after turning the ignition switch ON.
Standard: Normal codes are output.
NG REPLACE AIR CONDITIONING AMPLIFIER
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE

Resistance of photodiode
Strength of solar radiationWeak Strong
High
Low
I35375
TSP A16 L21 A18
A/C Solar Sensor
2IF11A/C Control Assembly
L
TSD A16 LG9
3IF12
LG
S5±4 A16 O15
1IF13
O
± DIAGNOSTICSAIR CONDITIONING SYSTEM
05±1119
AVENSIS REPAIR MANUAL (RM1018E)
DTC 24 SOLAR SENSOR CIRCUIT (DRIVER SIDE)
CIRCUIT DESCRIPTION
A photo diode in the solar sensor detects solar radiation and
sends signals to the A/C amplifier.
DTC No.Detection ItemTrouble Area
Open or short in solar sensor circuit
Automatic light control sensor (solar sensor)
24
Open or short in solar sensor circuit.
(If the checking is being performed in a dark place, DTC 24g()

Harness or connector between automatic light control sensor
(solar sensor) and A/C amplifier assy(gg ,
could be displayed.)(solar sensor) and A/C amplifier assy

A/C amplifier assy
WIRING DIAGRAM
05C7N±01

I33908
1
3
I37731
A16
TSD
TSP S5±4
1 23 45 67 89101112
13141516171819202123 2224
05±1120
±
DIAGNOSTICS AIR CONDITIONING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1INSPECT COOLER (SOLAR SENSOR) THERMISTOR
(a)Remove cooler (solar sensor) thermistor.
(b)Cover the sensor with a cloth, and check the cooler (solar sensor) thermistor resistance.
(1)Measure resistance between terminals 1 and 3 of
the cooler (solar sensor) thermistor.
Resistance:

(No continuity)
HINT:
Connect the ohmmter positive (+) lead to terminal 3 and the
ohmmeter negative (±) lead to terminal 1 of the cooler (solar
sensor) thermistor.
(c)Remove the cloth from the cooler (solar sensor) thermis- tor, and subject the sensor to the electric light and check
the cooler (solar sensor) thermistor resistance.
(1)Measure resistance between terminal 1 and 3 of the
cooler (solar sensor) thermistor.
Resistance: Approx. 10 k
(Continuity)
HINT:
Connect the positive (+) lead to ohmmeter to terminal 3 and
negative (±) lead to terminal 1 of the cooler (solar sensor)
thermistor.
NGREPLACE COOLER (SOLAR SENSOR) THERMISTOR
OK
2CHECK HARNESS AND CONNECTOR(COOLER (SOLAR SENSOR) THERMISTOR ± A/C AMPLIFIER)
(a)Check for open or short circuit in harness and connector
between solor sansor and A/C amplifier
(See page 01±32).
NG REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

± DIAGNOSTICSAIR CONDITIONING SYSTEM
05±1121
AVENSIS REPAIR MANUAL (RM1018E)
3 READ OUTPUT DTC
(a) Clear the DTCs.
(b) Read the DTC at least 8.5 minutes after turning the ignition switch ON.
Standard: Normal codes are output.
NG REPLACE AIR CONDITIONING AMPLIFIER
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE