2005 TOYOTA AVENSIS MOTOR

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

I35380
R±W
(*2)J26 J26HH
IE111
IE218
A157
MGV A/C Control Assembly
R±W
(*2)R±W R±B R±Y J/CC4
Condenser
Assembly
12
Driver Side J/B
DC6
DB5
R±W
(*1)
From
HTR Fuse
*1: LHD
*2: RHD
± DIAGNOSTICSAIR CONDITIONING SYSTEM
05±1157
AVENSIS REPAIR MANUAL (RM1018E)
HOT GAS HEATER MAGNETIC VALVE CIRCUIT
CIRCUIT DESCRIPTION
For the hot gas heater, it is necessary to 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
05C7R±01

I35397
R±W (*1)1
CB A15 RECR±Y A21
Air Inlet Control
Servo Motor
5 A/C Control Assembly
3 Center J/B
Driver Side J/B
From
HTR Fuse J266
CER±W (*1)
+
1
R±W (*2)
A15 FRS P±B6
R±W (*2)
J26 HHJ/C
2
R±W (*2)
R±W (*2)
DC6
*1: LHD
*2: RHD
± DIAGNOSTICSAIR CONDITIONING SYSTEM
05±1153
AVENSIS REPAIR MANUAL (RM1018E)
RECIRCULATION DAMPER SERVOMOTOR CIRCUIT
CIRCUIT DESCRIPTION
The recirculation damper servomotor is controlled by the A/C amplifier and moves the air inlet damper to the
desired position.
WIRING DIAGRAM
05C7Q±01

I36092
LHD Models:
FRSREC
I36094
I36093
RHD Models:
FRS
REC
I36094
± DIAGNOSTICSAIR CONDITIONING SYSTEM
05±1155
AVENSIS REPAIR MANUAL (RM1018E)
2 INSPECT RECIRCULATION DAMPER SERVO SUB±ASSY
(a) Remove the recirculation damper servo sub±assy.
(b) Connect the positive (+) lead to from the battery to termi-
nal 3 and negative (±) lead to terminal 2, then check that
the arm turns to ºFRSº side smoothly.
(c) Connect the positive (+) lead to from the battery to termi-
nal 3 and negative (±) lead to terminal 1, then check that
the arm turns to ºRECº side smoothly.
If operattions are not as specified, replace the mode damper
servomotor.
NG REPLACE RECIRCULATION DAMPER SERVO
SUB±ASSY
OK

I36148
Duty Ratio =A + BA
x 100 (%)
ON 0 VOFF 5 VA
1 cycle Blower Level (Reference)
Si duty (%)
B HI
M8
M7
M6
M5
M4
M3
M2
M1
LO
26.3
30.937.8
44.751.6
58.465.3
74.583.7 100.0
I36133
B5
Blower Motor
Controller
A/C Control Assembly
SI
+B
VM
GND2
3
4
1LB
M
2
1 L±BL±BR
Driver Side J/B
DF2From
HTR
RELAY
L±B
J15
J/C A
IK5
A16 BLW L±B
2
IJ2
1
IJ2
4
IJ2 B±WB
W±B 3
IJ2
B4
Blower Motor
W±B 05±1148
± DIAGNOSTICSAIR CONDITIONING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
BLOWER MOTOR CIRCUIT
CIRCUIT DESCRIPTION
The blower motor is operated by signals from the A/C amplifier. Blower motor speed signals are transmitted
by changes in the Duty Ratio.
Duty Ratio
The duty ratio is the ratio of the period of continuity in one cycle. For example, if A is the period of continuity
in one cycle, and then B is the period of non±continuity.
WIRING DIAGRAM
05C7O±01

I30151
2
1
LHD
RHD
±
DIAGNOSTICS AIR CONDITIONING SYSTEM
05±1149
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1PERFORM ACTUATOR CHECK
(a)Set to actuator check mode (See page 05±1091).
(b)Press the DEF switch and change to step operation.
(c)Check the air flow level by hand.
Display CodeBlower level
00
11
216
316
416
516
616
716
816
931
OKPROCEED TO NEXT CIRCUIT INSPECTION
SHOWN ON PROBLEM SYMPTOMS TABLE
NG
2INSPECT BLOWER W/FAN MOTOR SUB±ASSY
(a)Connect the positive (+) lead from the battery to terminal 1 and negative (±) to terminal 2.
Standard: Blower motor operates smoothly.
If operation is not as specified, replace the blower motor.
NGREPLACE BLOWER W/FAN MOTOR SUB±ASSY
OK
3CHECK HARNESS AND CONNECTOR(BLOWER W/FAN MOTOR SUB±ASSY ± BLOWER MOTOR CONTROL)
(a)Check for an open or short circuit in harness and connector between blow\
er w/fan motor sub±assy
and blower motor control (See page 01±32).
NG REPAIR OR REPLACE HARNESS ORCONNECTOR
OK


I37588
B5
GND
1234
I36144
BLW
A16A15
I31456
GND
2V/
Division
500
s sec. / Division
05±1150
±
DIAGNOSTICS AIR CONDITIONING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
4CHECK HARNESS AND CONNECTOR(BLOWER MOTOR CONTROL ± BODY GROUND)
(a)Check for an open circuit in harness and connector be-
tween terminal GND of blower motor control and body
ground (See page 01±32).
NGREPAIR OR REPLACE HARNESS OR CONNECTOR
OK
5INSPECT AIR CONDITIONING AMPLIFIER(BLW)
(a)Remove the A/C amplifier with connectors being con- nected.
(b)Turn the ignition switch ON.
(c)Blower switch is ON.
(d)Measure the waveform between terminal BLW of A/C am- plifier and body ground.
OK: Pulse generation
HINT:

The correct waveform is as shown.

Waveform varies with blower level.
NGREPLACE AIR CONDITIONING AMPLIFIER
OK
6CHECK HARNESS OR CONNECTOR(A/C AMPLIFIER ± BLOWER MOTOR CONTROL)
(a)Check for an open or short circuit in harness and connector between A/C amplifier and\
blower motor
control (See page 01±32).
NG REPAIR OR REPLACE HARNESS ORCONNECTOR
OK
REPLACE BLOWER MOTOR CONTROL

I35394
Driver Side J/B
L2
DP
1
DN
5
DH B±G (*1)
B±L (*2)
G±Y9
DA
1
DH4
DF2
DF34
DA HTR HTR Relay
12
53
4L±B
To
Blower Motor GR±R
W±BA1617 A/C Control Assembly
HR
W±B
AM153
12IG1 Relay
I13
Ignition SW
G±R G±Y
AM1 IG1 1 3
G±Y
B±L (*2)1
ED1W (*2)Engine Room R/B No.3
3
3140A
ALT
1 23B (*2)
B±G (*1)W (*2) Engine Room R/B
No.1 & Engine Room J/B No.1
L
11B1 HTR
1 2
Engine Room R/B No.4
1
4C
4D1120A ALT (*3)
100A ALT (*4)
4B1
B±G (*1)
B (*2)
W±B
W±B FL MAIN
BatteryIJ
*1: Gasoline
*2: 1CD±FTV*3: 1AZ±FSE, 1AZ±FE
*4: 1ZZ±FE, 3ZZ±FE 05±1146
± DIAGNOSTICSAIR CONDITIONING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
HEATER RELAY CIRCUIT
CIRCUIT DESCRIPTION
The heater relay is switched on by signals from the A/C amplifier. It supplies power to the blower motor.
WIRING DIAGRAM
050U2±12