TOYOTA AVENSIS 2005 Service Repair Manual

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

05±1132
± DIAGNOSTICSAIR CONDITIONING SYSTEM
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

TPM terminal voltage
(V)
4
1
0 100%
Damper opening angle
I35378
A25
Air Vent Mode Control Servo Motor A/C Control Assembly
M
FACE 5L±B
A15 AOF4
DEF 4LG±B
A15 AOD3
PT 3GR±R
A16 TPM19
VZ 2BR±W
A16 S5±314
GND 1G±W
A15 SG±315 05±1126
± DIAGNOSTICSAIR CONDITIONING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
DTC 33 AIR OUTLET DAMPER POSITION SENSOR
CIRCUIT
CIRCUIT DESCRIPTION
This sensor detects the position of the mode damper and sends
the appropriate signals to the A/C amplifier. The position sensor
is built in the mode damper servo sub±assy.
DTC No.Detection ItemTrouble Area
33Short to ground or power source circuit in mode damper posi-
tion sensor circuit.

Mode damper servo sub±assy (mode damper position sen-
sor)

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

A/C amplifier assy
WIRING DIAGRAM
05A7X±02

I36144
TPM SG±3
A16A15
I35385
DEF
F
ACE
12345
PTV
Z GND
±
DIAGNOSTIC SAIR CONDITIONING SYSTEM
05± 1127
A VENSIS RE PAIR MANUAL (RM1018E)
INSPECTIO N PROCEDURE
1 INSPEC T AIR CONDITIONING AMPLIFIER(TPM ± SG±3)
(a ) Remov e the A/C amplifier with being connectors con-
nected.
(b ) Tur n the ignition switch to ON.
(c ) Chang e the set to activate the mode damper sub±assy
an d measure voltage between terminal TPM and SG±3
o f A/C amplifier ass y.
Standard:
F ACE: 3.5 to 4.5 V
DEF: 0.5 to 1.5 V
HIN T:
As the is moved from F ACE side to DEF side, the voltage de-
creases gradually with out interruption.
OK PROCEE D TO NEXT CIRCUIT INSPECTION
SHOW N ON PROBLEM SYMP TOMS TABLE
NG
2 INSPECT MODE DAMPER SE RVO SUB±ASSY
(a ) Remove the mode damper servo sub±ass y.
(b ) Measur e the resistance between terminal VZ and GND of
mod e damper servo sub±assy connecto r.
Standard: 4.2 ± 7.8 k

(c ) While operating mode damper servo sub±assy as in the
procedur e on page 05± 1136 , measure the resistance be-
tween terminal PT and GND of mode damper servo sub±
assy.
Standard:
DEF: 3.4 to 6.2 k

FACE: 0.8 to 1.6 k

HINT:
As the mode damper servo sub±assy moved from DEF side to
FACE side, the resistance decreases gradually with out inter-
ruption.
NG REPLACE MODE DAMPER SERVO SUB±ASSY
OK

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